/* ============================================================
   AI STEAM PLUS — Premium Futuristic Education Platform CSS
   ============================================================ */

/* -------------------------------------------------------
   0. CSS Custom Properties
   ------------------------------------------------------- */
:root {
  /* Color Palette */
  --navy: #0A0F1E;
  --navy-light: #111827;
  --surface: #1a1f2e;
  --surface-hover: #252b3d;
  --green: #00FF88;
  --green-dark: #00cc6a;
  --green-glow: rgba(0, 255, 136, 0.15);
  --purple: #7B5EA7;
  --purple-light: #9b7ec7;
  --white: #FFFFFF;
  --text: #e0e0e0;
  --text-muted: #8892a4;
  --border: #2a3042;
  --danger: #ff4757;
  --warning: #ffa502;
  --info: #3b82f6;

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-body: 1.6;
  --line-height-heading: 1.2;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Borders & Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-green: 0 0 20px rgba(0, 255, 136, 0.2);
  --shadow-green-lg: 0 0 40px rgba(0, 255, 136, 0.3);
  --shadow-purple: 0 0 20px rgba(123, 94, 167, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Z-Index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-sidebar: 300;
  --z-modal-overlay: 400;
  --z-modal: 500;
  --z-tooltip: 600;
  --z-ai-panel: 700;
}

/* -------------------------------------------------------
   1. Global Reset & Base
   ------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-body);
  color: var(--text);
  background-color: var(--navy);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--navy-light);
}

::-webkit-scrollbar-thumb {
  background: var(--green-dark);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--green);
}

/* Firefox Scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--green-dark) var(--navy-light);
}

/* Selection */
::selection {
  background: var(--green);
  color: var(--navy);
}

/* Base Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-heading);
  color: var(--white);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  color: var(--text);
  margin-bottom: var(--space-md);
}

a {
  color: var(--green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--green-dark);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Skip to Content — Accessibility */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  background: var(--green);
  color: var(--navy);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-md);
}

/* -------------------------------------------------------
   2. Layout Utilities
   ------------------------------------------------------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  max-width: 720px;
}

.container-wide {
  max-width: 1440px;
}

.section {
  padding: var(--space-3xl) 0;
}

.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.text-center { text-align: center; }
.text-green { color: var(--green); }
.text-muted { color: var(--text-muted); }
.text-white { color: var(--white); }

/* -------------------------------------------------------
   3. Components — Buttons
   ------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 28px;
  font-weight: var(--font-weight-semibold);
  font-size: 0.9375rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
  user-select: none;
  min-height: 44px;
  min-width: 44px;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--green);
  color: var(--navy);
  box-shadow: var(--shadow-green);
}

.btn-primary:hover {
  background: var(--green-dark);
  box-shadow: var(--shadow-green-lg);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,0.2) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover::after {
  opacity: 1;
}

.btn-secondary {
  background: transparent;
  color: var(--purple-light);
  border: 2px solid var(--purple);
}

.btn-secondary:hover {
  background: var(--purple);
  color: var(--white);
  box-shadow: var(--shadow-purple);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  padding: 12px 20px;
}

.btn-ghost:hover {
  color: var(--white);
  background: rgba(255, 255, 255, 0.05);
}

.btn-danger {
  background: var(--danger);
  color: var(--white);
}

.btn-danger:hover {
  background: #e8414f;
  box-shadow: 0 0 20px rgba(255, 71, 87, 0.3);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.8125rem;
  min-height: 36px;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.0625rem;
}

.btn-icon {
  padding: 10px;
  min-width: 44px;
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* -------------------------------------------------------
   4. Components — Cards
   ------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--surface-hover);
  background: var(--surface-hover);
}

.card-glass {
  background: rgba(26, 31, 46, 0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  transition: all var(--transition-base);
}

.card-glass:hover {
  background: rgba(37, 43, 61, 0.7);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* -------------------------------------------------------
   5. Components — Form Fields
   ------------------------------------------------------- */
.input-field,
.select-field,
.textarea-field {
  width: 100%;
  padding: 12px 16px;
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.input-field:focus,
.select-field:focus,
.textarea-field:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px var(--green-glow);
}

.input-field::placeholder {
  color: var(--text-muted);
}

.textarea-field {
  resize: vertical;
  min-height: 120px;
}

.select-field {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238892a4' d='M1.41 0L6 4.58 10.59 0 12 1.41l-6 6-6-6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.form-label {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text);
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.form-error {
  font-size: 0.75rem;
  color: var(--danger);
}

.input-field.error {
  border-color: var(--danger);
}

.input-field.error:focus {
  box-shadow: 0 0 0 3px rgba(255, 71, 87, 0.15);
}

/* -------------------------------------------------------
   6. Components — Badge
   ------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-green {
  background: var(--green-glow);
  color: var(--green);
}

.badge-purple {
  background: rgba(123, 94, 167, 0.2);
  color: var(--purple-light);
}

.badge-danger {
  background: rgba(255, 71, 87, 0.15);
  color: var(--danger);
}

.badge-warning {
  background: rgba(255, 165, 2, 0.15);
  color: var(--warning);
}

.badge-info {
  background: rgba(59, 130, 246, 0.15);
  color: var(--info);
}

/* -------------------------------------------------------
   7. Components — Progress
   ------------------------------------------------------- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--navy-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--green-dark), var(--green));
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.2) 50%,
    transparent 100%
  );
  animation: shimmer 2s infinite;
}

.progress-bar-sm {
  height: 4px;
}

.progress-bar-lg {
  height: 12px;
}

/* Circular Progress Ring */
.progress-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.progress-ring svg {
  transform: rotate(-90deg);
}

.progress-ring-track {
  fill: none;
  stroke: var(--navy-light);
  stroke-width: 6;
}

.progress-ring-fill {
  fill: none;
  stroke: var(--green);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset var(--transition-slow);
}

.progress-ring-text {
  position: absolute;
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

/* -------------------------------------------------------
   8. Components — Modal
   ------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 15, 30, 0.85);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-modal);
  transform: scale(0.95) translateY(10px);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.modal-title {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

.modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--surface-hover);
  color: var(--white);
}

.modal-body {
  margin-bottom: var(--space-lg);
}

.modal-footer {
  display: flex;
  gap: var(--space-sm);
  justify-content: flex-end;
}

/* -------------------------------------------------------
   9. Components — Tooltip
   ------------------------------------------------------- */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 6px 12px;
  background: var(--surface-hover);
  color: var(--white);
  font-size: 0.75rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
  pointer-events: none;
  box-shadow: var(--shadow-md);
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* -------------------------------------------------------
   10. Components — Alerts
   ------------------------------------------------------- */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  border-left: 4px solid;
}

.alert-success {
  background: var(--green-glow);
  border-color: var(--green);
  color: var(--green);
}

.alert-warning {
  background: rgba(255, 165, 2, 0.1);
  border-color: var(--warning);
  color: var(--warning);
}

.alert-error {
  background: rgba(255, 71, 87, 0.1);
  border-color: var(--danger);
  color: var(--danger);
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--info);
  color: var(--info);
}

/* -------------------------------------------------------
   11. Components — Tabs
   ------------------------------------------------------- */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  gap: var(--space-xs);
  overflow-x: auto;
}

.tab {
  padding: 12px 20px;
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-height: 44px;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--green);
  border-bottom-color: var(--green);
}

.tab-content {
  display: none;
  padding: var(--space-lg) 0;
  animation: fadeIn var(--transition-base);
}

.tab-content.active {
  display: block;
}

/* -------------------------------------------------------
   12. Components — Accordion
   ------------------------------------------------------- */
.accordion {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion-item {
  border-bottom: 1px solid var(--border);
}

.accordion-item:last-child {
  border-bottom: none;
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  width: 100%;
  text-align: left;
  color: var(--white);
  font-weight: var(--font-weight-medium);
  transition: background var(--transition-fast);
  min-height: 52px;
}

.accordion-header:hover {
  background: var(--surface-hover);
}

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-base);
  color: var(--text-muted);
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 0 var(--space-lg) var(--space-lg);
  display: none;
  animation: fadeIn var(--transition-fast);
}

.accordion-item.open .accordion-body {
  display: block;
}

/* -------------------------------------------------------
   13. Components — Avatar
   ------------------------------------------------------- */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 2px solid var(--border);
  object-fit: cover;
  flex-shrink: 0;
}

.avatar-sm {
  width: 32px;
  height: 32px;
}

.avatar-lg {
  width: 56px;
  height: 56px;
}

.avatar-xl {
  width: 80px;
  height: 80px;
}

.avatar-green-border {
  border-color: var(--green);
}

.avatar-group {
  display: flex;
}

.avatar-group .avatar {
  margin-left: -8px;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

/* -------------------------------------------------------
   14. Components — Skeleton Loading
   ------------------------------------------------------- */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface) 25%,
    var(--surface-hover) 50%,
    var(--surface) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-sm);
}

.skeleton-text:last-child {
  width: 60%;
}

.skeleton-heading {
  height: 24px;
  width: 40%;
  margin-bottom: var(--space-md);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

.skeleton-card {
  height: 200px;
}

.skeleton-image {
  height: 180px;
}

/* -------------------------------------------------------
   15. Loading Spinner
   ------------------------------------------------------- */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--green);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-sm {
  width: 20px;
  height: 20px;
  border-width: 2px;
}

.spinner-lg {
  width: 48px;
  height: 48px;
  border-width: 4px;
}

/* -------------------------------------------------------
   16. Landing Page — Navbar
   ------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(10, 15, 30, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  letter-spacing: -0.02em;
}

.navbar-brand span {
  color: var(--green);
}

.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.navbar-link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--white);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--navy);
  padding: var(--space-lg);
  flex-direction: column;
  gap: var(--space-md);
  z-index: var(--z-sidebar);
}

.mobile-nav.open {
  display: flex;
}

.mobile-nav .navbar-link {
  font-size: 1.125rem;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
}

/* -------------------------------------------------------
   17. Landing Page — Hero
   ------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 50%, rgba(123, 94, 167, 0.15) 100%);
  animation: heroGradient 8s ease infinite alternate;
  background-size: 200% 200%;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(0, 255, 136, 0.05), transparent 60%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--navy), transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 16px;
  background: var(--green-glow);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--green);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: var(--space-lg);
  line-height: 1.1;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xl);
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
}

.hero-stat-value {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------
   18. Landing Page — Features
   ------------------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  padding: var(--space-xl);
  text-align: center;
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  background: var(--green-glow);
  border-radius: var(--radius-lg);
  color: var(--green);
  font-size: 1.5rem;
}

.feature-title {
  font-size: 1.125rem;
  margin-bottom: var(--space-sm);
}

.feature-description {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------
   19. Landing Page — Grade Band Cards
   ------------------------------------------------------- */
.grade-bands-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.grade-band-card {
  border-top: 3px solid;
  padding-top: var(--space-lg);
}

.grade-band-card.elementary {
  border-top-color: var(--green);
}

.grade-band-card.middle {
  border-top-color: var(--purple);
}

.grade-band-card.high {
  border-top-color: var(--info);
}

.grade-band-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.grade-band-range {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

/* -------------------------------------------------------
   20. Landing Page — Pricing
   ------------------------------------------------------- */
.pricing-card {
  border: 2px solid var(--border);
  padding: var(--space-xl);
  border-radius: var(--radius-2xl);
  text-align: center;
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card.featured {
  border-color: var(--green);
  box-shadow: var(--shadow-green-lg);
}

.pricing-card.featured::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--radius-2xl);
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  z-index: -1;
  opacity: 0.15;
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--green);
  color: var(--navy);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.pricing-price {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  margin: var(--space-md) 0;
}

.pricing-price span {
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: var(--font-weight-normal);
}

.pricing-features {
  text-align: left;
  margin: var(--space-lg) 0;
}

.pricing-feature {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: 0.875rem;
  color: var(--text);
}

.pricing-feature-check {
  color: var(--green);
  flex-shrink: 0;
}

/* -------------------------------------------------------
   21. Landing Page — Stats Bar
   ------------------------------------------------------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--green);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* -------------------------------------------------------
   22. Landing Page — Enrollment Modal
   ------------------------------------------------------- */
.enrollment-modal .modal {
  max-width: 480px;
}

.enrollment-modal .modal-header {
  text-align: center;
  flex-direction: column;
}

.enrollment-steps {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.enrollment-step {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8125rem;
  font-weight: var(--font-weight-bold);
  background: var(--navy-light);
  color: var(--text-muted);
  border: 2px solid var(--border);
}

.enrollment-step.active {
  background: var(--green);
  color: var(--navy);
  border-color: var(--green);
}

.enrollment-step.completed {
  background: var(--green-glow);
  color: var(--green);
  border-color: var(--green);
}

/* -------------------------------------------------------
   23. Footer
   ------------------------------------------------------- */
.footer {
  background: var(--navy-light);
  border-top: 1px solid var(--border);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  margin-bottom: var(--space-md);
}

.footer-brand span {
  color: var(--green);
}

.footer-description {
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 300px;
}

.footer-heading {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--green);
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-socials {
  display: flex;
  gap: var(--space-md);
}

.footer-social {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  transition: all var(--transition-fast);
}

.footer-social:hover {
  color: var(--green);
  background: var(--green-glow);
}

/* -------------------------------------------------------
   24. Login Page
   ------------------------------------------------------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background: var(--navy);
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: var(--space-2xl);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
}

.login-title {
  font-size: 1.5rem;
  text-align: center;
  margin-bottom: var(--space-xs);
}

.login-subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-xl);
}

.login-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
  color: var(--text-muted);
  font-size: 0.8125rem;
}

.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.login-footer {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--space-lg);
}

.social-login {
  display: flex;
  gap: var(--space-sm);
}

.social-login-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 10px;
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 0.875rem;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.social-login-btn:hover {
  border-color: var(--text-muted);
  background: var(--surface-hover);
}

/* -------------------------------------------------------
   25. Dashboard — Layout
   ------------------------------------------------------- */
.dashboard-layout {
  display: flex;
  min-height: 100vh;
  padding-top: 0;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--navy-light);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: var(--z-sidebar);
  transition: transform var(--transition-base);
}

.sidebar-header {
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.sidebar-nav {
  flex: 1;
  padding: var(--space-md);
  overflow-y: auto;
}

.sidebar-section {
  margin-bottom: var(--space-lg);
}

.sidebar-section-title {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-xs);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.sidebar-link:hover {
  color: var(--text);
  background: var(--surface);
}

.sidebar-link.active {
  color: var(--green);
  background: var(--green-glow);
}

.sidebar-link-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-link-badge {
  margin-left: auto;
  padding: 2px 8px;
  background: var(--green);
  color: var(--navy);
  font-size: 0.6875rem;
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
}

.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
}

.sidebar-user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user-name {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-role {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Dashboard main */
.dashboard-main {
  flex: 1;
  margin-left: 260px;
  min-height: 100vh;
}

/* Top Bar */
.topbar {
  height: 64px;
  background: var(--navy);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-lg);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.topbar-title {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.ai-assistant-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 16px;
  background: var(--green-glow);
  border: 1px solid rgba(0, 255, 136, 0.2);
  border-radius: var(--radius-full);
  color: var(--green);
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.ai-assistant-btn:hover {
  background: rgba(0, 255, 136, 0.25);
  box-shadow: var(--shadow-green);
}

.dashboard-content {
  padding: var(--space-lg);
}

/* Progress Cards */
.progress-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.progress-card {
  padding: var(--space-lg);
  display: flex;
  gap: var(--space-md);
}

.progress-card-info {
  flex: 1;
}

.progress-card-title {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.progress-card-value {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

/* Skill Tree */
.skill-tree {
  position: relative;
  padding: var(--space-lg);
}

.skill-node {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  color: var(--text);
  transition: all var(--transition-fast);
}

.skill-node.completed {
  border-color: var(--green);
  color: var(--green);
}

.skill-node.current {
  border-color: var(--green);
  background: var(--green-glow);
  color: var(--green);
  box-shadow: var(--shadow-green);
}

.skill-node.locked {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Weekly Summary */
.weekly-summary {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--space-sm);
}

.weekly-day {
  text-align: center;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: var(--surface);
  border: 1px solid var(--border);
}

.weekly-day-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
}

.weekly-day-value {
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
}

.weekly-day.active {
  border-color: var(--green);
  background: var(--green-glow);
}

/* Grade Band Colors (Dashboard) */
.grade-elementary { color: var(--green); }
.grade-middle { color: var(--purple-light); }
.grade-high { color: var(--info); }

.grade-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  display: inline-block;
}

.grade-dot.elementary { background: var(--green); }
.grade-dot.middle { background: var(--purple); }
.grade-dot.high { background: var(--info); }

/* Activity Feed */
.activity-feed {
  display: flex;
  flex-direction: column;
}

.activity-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--green);
  margin-top: 6px;
  flex-shrink: 0;
}

.activity-text {
  font-size: 0.875rem;
  color: var(--text);
}

.activity-time {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* -------------------------------------------------------
   26. Course Player — Layout
   ------------------------------------------------------- */
.course-player {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* Lesson Sidebar */
.lesson-sidebar {
  width: 320px;
  background: var(--navy-light);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
}

.lesson-sidebar-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
}

.lesson-sidebar-title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lesson-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-sm) 0;
}

.lesson-module {
  border-bottom: 1px solid var(--border);
}

.lesson-module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  transition: background var(--transition-fast);
  min-height: 44px;
}

.lesson-module-header:hover {
  background: var(--surface);
}

.lesson-module-title {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--text);
}

.lesson-module-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px var(--space-lg) 10px calc(var(--space-lg) + var(--space-md));
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  cursor: pointer;
  min-height: 44px;
}

.lesson-item:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.02);
}

.lesson-item.active {
  color: var(--green);
  background: var(--green-glow);
}

.lesson-item.completed {
  color: var(--text);
}

.lesson-item-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.lesson-item-check {
  color: var(--green);
}

.lesson-item-duration {
  margin-left: auto;
  font-size: 0.6875rem;
  color: var(--text-muted);
}

/* Course Progress Bar (bottom) */
.course-progress-bar {
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border);
}

.course-progress-text {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  justify-content: space-between;
}

/* Main Content Area */
.lesson-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.lesson-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  min-height: 56px;
  background: var(--navy);
}

.lesson-topbar-title {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

.lesson-content-area {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xl);
}

.lesson-text-content {
  max-width: 800px;
  margin: 0 auto;
}

.lesson-text-content h2 {
  margin: var(--space-xl) 0 var(--space-md);
}

.lesson-text-content h3 {
  margin: var(--space-lg) 0 var(--space-md);
}

.lesson-text-content p {
  margin-bottom: var(--space-md);
}

.lesson-text-content ul,
.lesson-text-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-lg);
}

.lesson-text-content li {
  list-style: disc;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.lesson-text-content ol li {
  list-style: decimal;
}

.lesson-text-content code {
  background: var(--navy-light);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.875em;
  color: var(--green);
}

.lesson-text-content pre {
  background: var(--navy-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

.lesson-text-content pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.7;
}

.lesson-text-content blockquote {
  border-left: 3px solid var(--green);
  padding-left: var(--space-md);
  margin: var(--space-md) 0;
  color: var(--text-muted);
  font-style: italic;
}

.lesson-text-content img {
  border-radius: var(--radius-md);
  margin: var(--space-md) 0;
}

.lesson-text-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-md);
}

.lesson-text-content th,
.lesson-text-content td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  text-align: left;
  font-size: 0.875rem;
}

.lesson-text-content th {
  background: var(--navy-light);
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

/* Navigation Footer */
.lesson-nav-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border);
  background: var(--navy);
}

/* -------------------------------------------------------
   27. Quiz Cards
   ------------------------------------------------------- */
.quiz-container {
  max-width: 720px;
  margin: 0 auto;
}

.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
}

.quiz-progress {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.quiz-timer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

.quiz-timer.warning {
  border-color: var(--warning);
  color: var(--warning);
}

.quiz-timer.danger {
  border-color: var(--danger);
  color: var(--danger);
  animation: pulse 1s infinite;
}

.quiz-question {
  margin-bottom: var(--space-xl);
}

.quiz-question-text {
  font-size: 1.125rem;
  font-weight: var(--font-weight-medium);
  color: var(--white);
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 52px;
}

.quiz-option:hover {
  border-color: var(--text-muted);
  background: var(--surface-hover);
}

.quiz-option.selected {
  border-color: var(--green);
  background: var(--green-glow);
}

.quiz-option.correct {
  border-color: var(--green);
  background: var(--green-glow);
}

.quiz-option.incorrect {
  border-color: var(--danger);
  background: rgba(255, 71, 87, 0.1);
}

.quiz-option-label {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 2px solid var(--border);
  font-size: 0.8125rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.quiz-option.selected .quiz-option-label {
  background: var(--green);
  border-color: var(--green);
  color: var(--navy);
}

.quiz-option-text {
  font-size: 0.9375rem;
  color: var(--text);
}

.quiz-explanation {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: var(--surface);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--green);
  font-size: 0.875rem;
  color: var(--text);
}

/* -------------------------------------------------------
   28. Lab / Simulation Container
   ------------------------------------------------------- */
.lab-container {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--navy-light);
}

.lab-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  min-height: 44px;
}

.lab-toolbar-title {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

.lab-toolbar-actions {
  display: flex;
  gap: var(--space-sm);
}

.lab-canvas {
  width: 100%;
  min-height: 400px;
  background: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lab-canvas canvas {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.lab-controls {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.lab-control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.lab-control-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.lab-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 150px;
  height: 4px;
  background: var(--border);
  border-radius: var(--radius-full);
  outline: none;
}

.lab-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--green);
  border-radius: var(--radius-full);
  cursor: pointer;
  box-shadow: var(--shadow-green);
}

.lab-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--green);
  border-radius: var(--radius-full);
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-green);
}

.lab-data-table {
  width: 100%;
  border-collapse: collapse;
}

.lab-data-table th,
.lab-data-table td {
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--border);
  font-size: 0.8125rem;
  text-align: left;
}

.lab-data-table th {
  background: var(--surface);
  color: var(--white);
  font-weight: var(--font-weight-semibold);
}

.lab-data-table td {
  color: var(--text);
}

/* -------------------------------------------------------
   29. Code Editor Container
   ------------------------------------------------------- */
.code-editor-container {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--navy-light);
}

.code-editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.code-editor-tabs {
  display: flex;
  gap: 2px;
}

.code-editor-tab {
  padding: 6px 14px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.code-editor-tab.active {
  background: var(--navy-light);
  color: var(--white);
}

.code-editor-body {
  min-height: 300px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  padding: var(--space-md);
  color: var(--text);
}

.code-editor-output {
  border-top: 1px solid var(--border);
  padding: var(--space-md);
  background: var(--navy);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  color: var(--green);
  max-height: 200px;
  overflow-y: auto;
}

.code-editor-output.error {
  color: var(--danger);
}

/* -------------------------------------------------------
   30. Vocabulary Cards
   ------------------------------------------------------- */
.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--space-md);
}

.vocab-card {
  padding: var(--space-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.vocab-card:hover {
  transform: rotateY(5deg);
}

.vocab-card.flipped {
  background: var(--green-glow);
  border-color: var(--green);
}

.vocab-term {
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.vocab-definition {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.vocab-card.flipped .vocab-definition {
  color: var(--text);
}

/* -------------------------------------------------------
   31. Project Workspace
   ------------------------------------------------------- */
.project-workspace {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.project-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.project-canvas {
  min-height: 500px;
  background: var(--navy);
  padding: var(--space-lg);
}

.project-sidebar-panel {
  width: 280px;
  background: var(--navy-light);
  border-left: 1px solid var(--border);
  padding: var(--space-md);
}

/* -------------------------------------------------------
   32. AI Tutor Panel
   ------------------------------------------------------- */
.ai-tutor-panel {
  position: fixed;
  top: 0;
  right: -400px;
  width: 400px;
  height: 100vh;
  background: var(--navy-light);
  border-left: 1px solid var(--border);
  z-index: var(--z-ai-panel);
  display: flex;
  flex-direction: column;
  transition: right var(--transition-base);
  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
}

.ai-tutor-panel.open {
  right: 0;
}

.ai-tutor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  min-height: 56px;
}

.ai-tutor-title {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
}

.ai-tutor-indicator {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--green);
  animation: pulse 2s infinite;
}

.ai-tutor-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Chat Bubbles */
.chat-bubble {
  max-width: 85%;
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  line-height: 1.5;
  animation: fadeIn var(--transition-fast);
}

.chat-bubble.user {
  align-self: flex-end;
  background: var(--surface);
  color: var(--text);
  border-bottom-right-radius: var(--radius-sm);
}

.chat-bubble.ai {
  align-self: flex-start;
  background: var(--green-glow);
  color: var(--text);
  border-bottom-left-radius: var(--radius-sm);
  border: 1px solid rgba(0, 255, 136, 0.15);
}

.chat-bubble.ai .chat-bubble-label {
  font-size: 0.6875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--green);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Typing Indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-md);
  align-self: flex-start;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--green);
  animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
  animation-delay: 0.4s;
}

/* Chat Input */
.ai-tutor-input {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
}

.ai-tutor-input-wrapper {
  display: flex;
  gap: var(--space-sm);
}

.ai-tutor-input-field {
  flex: 1;
  padding: 10px 16px;
  background: var(--navy);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--white);
  font-size: 0.875rem;
  min-height: 44px;
}

.ai-tutor-input-field:focus {
  outline: none;
  border-color: var(--green);
}

.ai-tutor-send-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green);
  color: var(--navy);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.ai-tutor-send-btn:hover {
  background: var(--green-dark);
  box-shadow: var(--shadow-green);
}

/* -------------------------------------------------------
   33. Keyframe Animations
   ------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideRight {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
  }
  50% {
    box-shadow: 0 0 40px rgba(0, 255, 136, 0.4);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes typing {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  30% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes heroGradient {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Scroll Reveal (JS toggles .revealed) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.revealed {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right.revealed {
  opacity: 1;
  transform: translateX(0);
}

/* Page Transition */
.page-transition {
  animation: fadeIn 0.3s ease;
}

/* -------------------------------------------------------
   34. Responsive — Breakpoints
   ------------------------------------------------------- */

/* <= 1280px */
@media (max-width: 1280px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .ai-tutor-panel {
    width: 360px;
    right: -360px;
  }
}

/* <= 1024px */
@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grade-bands-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .lesson-sidebar {
    width: 280px;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .dashboard-main {
    margin-left: 0;
  }

  .weekly-summary {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* <= 768px */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .hamburger {
    display: flex;
  }

  .navbar-links,
  .navbar-actions .btn {
    display: none;
  }

  .features-grid,
  .grade-bands-grid,
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 80px;
    min-height: auto;
    padding-bottom: var(--space-3xl);
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  /* Course player stacked */
  .course-player {
    flex-direction: column;
    height: auto;
    min-height: 100vh;
  }

  .lesson-sidebar {
    width: 100%;
    max-height: 50vh;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sidebar);
    transform: translateY(calc(100% - 56px));
    transition: transform var(--transition-base);
    border-right: none;
    border-top: 1px solid var(--border);
  }

  .lesson-sidebar.expanded {
    transform: translateY(0);
  }

  .lesson-main {
    padding-bottom: 56px;
  }

  .ai-tutor-panel {
    width: 100%;
    right: -100%;
  }

  .weekly-summary {
    grid-template-columns: repeat(4, 1fr);
  }

  .modal {
    margin: var(--space-md);
    max-height: calc(100vh - var(--space-xl));
  }

  .vocab-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

/* <= 480px */
@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .btn {
    padding: 10px 20px;
    font-size: 0.875rem;
    width: 100%;
    justify-content: center;
  }

  .btn-sm {
    width: auto;
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

  .weekly-summary {
    grid-template-columns: repeat(3, 1fr);
  }

  .quiz-option {
    padding: var(--space-md);
  }

  .login-card {
    padding: var(--space-lg);
  }

  .social-login {
    flex-direction: column;
  }

  .progress-cards-grid {
    grid-template-columns: 1fr;
  }

  .lab-controls {
    flex-direction: column;
  }
}

/* -------------------------------------------------------
   35. Accessibility
   ------------------------------------------------------- */

/* Focus visible */
*:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right {
    opacity: 1;
    transform: none;
  }

  .hero {
    animation: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --border: #555;
    --text-muted: #aaa;
    --surface: #1a1a1a;
    --surface-hover: #2a2a2a;
  }

  .card,
  .card-glass {
    border-width: 2px;
  }

  .btn-primary {
    border: 2px solid var(--green);
  }

  .btn-secondary {
    border-width: 3px;
  }

  .quiz-option {
    border-width: 3px;
  }
}

/* Forced colors (Windows High Contrast) */
@media (forced-colors: active) {
  .btn-primary {
    border: 2px solid ButtonText;
  }

  .progress-bar-fill {
    background: Highlight;
  }

  .sidebar-link.active {
    border: 2px solid Highlight;
  }
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* -------------------------------------------------------
   36. Print Styles
   ------------------------------------------------------- */
@media print {
  *,
  *::before,
  *::after {
    background: white !important;
    color: black !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .navbar,
  .sidebar,
  .topbar,
  .ai-tutor-panel,
  .hamburger,
  .mobile-nav,
  .btn,
  .footer,
  .lesson-nav-footer,
  .ai-assistant-btn,
  .modal-overlay {
    display: none !important;
  }

  .dashboard-main {
    margin-left: 0 !important;
  }

  .course-player {
    display: block;
  }

  .lesson-sidebar {
    display: none !important;
  }

  .lesson-main {
    margin: 0;
  }

  .lesson-content-area {
    padding: 0;
  }

  .card,
  .card-glass {
    border: 1px solid #ccc !important;
    page-break-inside: avoid;
  }

  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }

  img {
    max-width: 100% !important;
    page-break-inside: avoid;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666 !important;
  }

  .progress-bar {
    border: 1px solid #ccc !important;
  }

  .progress-bar-fill {
    background: #333 !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  @page {
    margin: 2cm;
  }
}

/* -------------------------------------------------------
   37. Utility Classes
   ------------------------------------------------------- */
.hidden { display: none !important; }
.visible { display: block !important; }
.invisible { visibility: hidden; }
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }
.pointer-events-none { pointer-events: none; }
.select-none { user-select: none; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.border { border: 1px solid var(--border); }
.border-green { border-color: var(--green); }
.border-purple { border-color: var(--purple); }

.bg-navy { background: var(--navy); }
.bg-navy-light { background: var(--navy-light); }
.bg-surface { background: var(--surface); }
.bg-green-glow { background: var(--green-glow); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

/* -------------------------------------------------------
   38. AI STEAM Plus — Lesson 3-Part Structure + Enriched Schema
   (added 2026-05-04 — supports parts[], differentiation,
    aiSupport, assessmentRubric, misconceptions, closingMessage,
    lesson-level vocabulary)
   ------------------------------------------------------- */

/* 38.1 Three-part lesson plan accordion ------------------ */
.lesson-parts-section {
  background: linear-gradient(180deg, rgba(0, 255, 136, 0.04) 0%, rgba(123, 94, 167, 0.04) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.lesson-parts-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.lesson-part-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-base);
}

.lesson-part-block[open] {
  border-color: var(--green);
  box-shadow: var(--shadow-green);
}

.lesson-part-block.part-1[open] { border-color: #3b82f6; box-shadow: 0 0 18px rgba(59, 130, 246, 0.25); }
.lesson-part-block.part-2[open] { border-color: var(--green); box-shadow: var(--shadow-green); }
.lesson-part-block.part-3[open] { border-color: var(--purple); box-shadow: var(--shadow-purple); }

.lesson-part-summary {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  cursor: pointer;
  list-style: none;
  font-weight: var(--font-weight-semibold);
  user-select: none;
}

.lesson-part-summary::-webkit-details-marker { display: none; }
.lesson-part-summary::marker { content: ''; }

.lesson-part-summary::after {
  content: '▾';
  margin-left: auto;
  color: var(--text-muted);
  transition: transform var(--transition-base);
}

.lesson-part-block[open] .lesson-part-summary::after { transform: rotate(180deg); }

.lesson-part-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: var(--font-weight-bold);
  background: var(--surface-hover);
  color: var(--text);
  flex-shrink: 0;
}

.part-1 .lesson-part-badge { background: rgba(59, 130, 246, 0.18); color: #60a5fa; }
.part-2 .lesson-part-badge { background: rgba(0, 255, 136, 0.18); color: var(--green); }
.part-3 .lesson-part-badge { background: rgba(123, 94, 167, 0.22); color: var(--purple-light); }

.lesson-part-title { color: var(--white); }

.lesson-part-duration {
  margin-left: var(--space-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.lesson-part-body {
  padding: 0 var(--space-lg) var(--space-lg) var(--space-lg);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.lesson-part-section {
  background: var(--navy-light);
  border-left: 3px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
}

.part-1 .lesson-part-section { border-left-color: #3b82f6; }
.part-2 .lesson-part-section { border-left-color: var(--green); }
.part-3 .lesson-part-section { border-left-color: var(--purple); }

.lesson-part-section-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.lesson-part-section-mins {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  background: rgba(255, 255, 255, 0.05);
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.lesson-part-section-title {
  color: var(--white);
  font-weight: var(--font-weight-semibold);
  font-size: 0.95rem;
}

.lesson-part-section-body { color: var(--text); }
.lesson-part-section-body p { margin-bottom: var(--space-sm); line-height: var(--line-height-body); }
.lesson-part-section-body p:last-child { margin-bottom: 0; }

.lesson-part-materials {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.lesson-part-materials-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
}

.lesson-part-materials-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.lesson-part-assessment {
  background: rgba(0, 255, 136, 0.06);
  border-left: 3px solid var(--green);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--text);
  font-size: 0.95rem;
}

/* 38.2 AI-Supported Learning callout --------------------- */
.ai-support-callout {
  background: linear-gradient(135deg, rgba(0, 200, 255, 0.08) 0%, rgba(0, 255, 136, 0.05) 100%);
  border: 1px solid rgba(0, 200, 255, 0.25);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.ai-support-tools {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.ai-tool-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(0, 200, 255, 0.18);
  color: #5dd1ff;
  border: 1px solid rgba(0, 200, 255, 0.35);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  font-size: 0.85rem;
  font-weight: var(--font-weight-medium);
}

.ai-support-rationale {
  color: var(--text);
  line-height: var(--line-height-body);
  margin: 0;
}

/* 38.3 Differentiation grid ------------------------------ */
.differentiation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.differentiation-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  border-left-width: 4px;
}

.differentiation-support { border-left-color: var(--green); background: rgba(0, 255, 136, 0.05); }
.differentiation-challenge { border-left-color: var(--warning); background: rgba(255, 165, 2, 0.05); }

.differentiation-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-sm);
}

.differentiation-support .differentiation-label { color: var(--green); }
.differentiation-challenge .differentiation-label { color: var(--warning); }

.differentiation-card p { color: var(--text); margin: 0; line-height: var(--line-height-body); }

/* 38.4 Assessment rubric --------------------------------- */
.assessment-rubric-section {
  background: rgba(0, 255, 136, 0.04);
  border: 1px solid rgba(0, 255, 136, 0.18);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.assessment-rubric-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.assessment-rubric-item {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  border-left: 3px solid var(--green);
}

.assessment-rubric-criterion { color: var(--white); font-weight: var(--font-weight-medium); margin-bottom: 4px; }
.assessment-rubric-evidence { color: var(--text-muted); font-size: 0.85rem; font-style: italic; }

/* 38.5 Misconception cards ------------------------------- */
.misconception-section {
  background: rgba(255, 71, 87, 0.04);
  border: 1px solid rgba(255, 71, 87, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.misconception-card {
  background: var(--surface);
  border-left: 4px solid var(--danger);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-sm);
}

.misconception-card:last-child { margin-bottom: 0; }
.misconception-belief { color: var(--text); margin-bottom: var(--space-xs); }
.misconception-correction { color: var(--green); }

/* 38.6 Closing transcendence message --------------------- */
.closing-message-section {
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.04) 0%, rgba(123, 94, 167, 0.04) 100%);
  border: none;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
}

.closing-message {
  font-style: italic;
  color: var(--text);
  font-size: 1.05rem;
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
  letter-spacing: 0.2px;
}

/* 38.7 Lesson-level vocabulary card grid ----------------- */
.lesson-vocab-section { margin-bottom: var(--space-xl); }

.vocab-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.vocab-card-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  cursor: pointer;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: all var(--transition-base);
  position: relative;
}

.vocab-card-item:hover {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-green);
}

.vocab-card-item .vocab-front,
.vocab-card-item .vocab-back {
  width: 100%;
}

.vocab-card-item .vocab-back { display: none; font-size: 0.85rem; color: var(--text); }
.vocab-card-item.flipped .vocab-front { display: none; }
.vocab-card-item.flipped .vocab-back { display: block; }
.vocab-card-item.flipped { background: var(--surface-hover); border-color: var(--green); }

/* -------------------------------------------------------
   39. AI STEAM Plus — Grade-band visual coding
   (added 2026-05-04 — extracted from authoritative HTML
    so each band has a distinctive accent that surfaces in
    dashboard banners, course headers, sidebar markers)
   ------------------------------------------------------- */

:root {
  --band-early-years: #0e7c7b;   /* KG3-G2 — Wonder & Exploration (teal) */
  --band-primary:     #1a6440;   /* G3-G5 — Investigation & Connection (green) */
  --band-middle:      #1a4480;   /* G6-G8 — Analysis & Systems (blue) */
  --band-secondary:   #5c2d91;   /* G9-G10 — Research & Modelling (purple) */
  --band-advanced:    #b53015;   /* G11-G12 — Mastery & Innovation (red) */
}

/* Per-band utility classes — apply as `data-band` on dashboard root or
   on course-header so the accent threads through the page. */
[data-band="early-years"] {
  --band-accent: var(--band-early-years);
  --band-accent-glow: rgba(14, 124, 123, 0.35);
}
[data-band="primary"] {
  --band-accent: var(--band-primary);
  --band-accent-glow: rgba(26, 100, 64, 0.35);
}
[data-band="middle"] {
  --band-accent: var(--band-middle);
  --band-accent-glow: rgba(26, 68, 128, 0.35);
}
[data-band="secondary"] {
  --band-accent: var(--band-secondary);
  --band-accent-glow: rgba(92, 45, 145, 0.35);
}
[data-band="advanced"] {
  --band-accent: var(--band-advanced);
  --band-accent-glow: rgba(181, 48, 21, 0.35);
}

/* Banner strip — top of dashboard.html / course.html, themed per band. */
.band-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: linear-gradient(
    135deg,
    var(--band-accent, var(--green)) 0%,
    rgba(0,0,0,0.25) 100%
  );
  color: #fff;
  font-family: var(--font-family);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 4px 18px var(--band-accent-glow, rgba(0,0,0,0.3));
}

.band-banner-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.band-banner-meta {
  font-size: 0.78rem;
  opacity: 0.9;
}

/* Subtle band tint behind active sidebar items + progress rings. */
.band-tint { color: var(--band-accent, var(--green)); }
.band-tint-bg { background: var(--band-accent, var(--green)); color: #fff; }

/* Honor band-specific tint inside the parts accordion. */
[data-band="early-years"] .lesson-part-block.part-2[open] {
  border-color: var(--band-early-years);
  box-shadow: 0 0 18px rgba(14,124,123,0.35);
}
[data-band="primary"] .lesson-part-block.part-2[open] {
  border-color: var(--band-primary);
  box-shadow: 0 0 18px rgba(26,100,64,0.35);
}
[data-band="middle"] .lesson-part-block.part-2[open] {
  border-color: var(--band-middle);
  box-shadow: 0 0 18px rgba(26,68,128,0.35);
}
[data-band="secondary"] .lesson-part-block.part-2[open] {
  border-color: var(--band-secondary);
  box-shadow: 0 0 18px rgba(92,45,145,0.35);
}
[data-band="advanced"] .lesson-part-block.part-2[open] {
  border-color: var(--band-advanced);
  box-shadow: 0 0 18px rgba(181,48,21,0.35);
}

/* -------------------------------------------------------
   40. AI STEAM Plus — Tier 3 dashboard widgets (lab + quiz)
   (added 2026-05-04 — surfaces backend lab_progress JSONB
    + quiz_attempts data in the standalone dashboard)
   ------------------------------------------------------- */

/* Per-unit pills (lab count + quiz count + average score) */
.unit-extras {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.55rem;
}

.unit-extra-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.72rem;
  font-weight: var(--font-weight-medium);
  background: rgba(0, 255, 136, 0.08);
  color: var(--green);
  border: 1px solid rgba(0, 255, 136, 0.24);
  border-radius: var(--radius-full);
  padding: 0.18rem 0.6rem;
  letter-spacing: 0.2px;
}

/* Quiz history widget */
.quiz-history-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-md);
  padding: var(--space-md) 0 var(--space-lg) 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-md);
}

.quiz-history-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.quiz-history-stat-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  font-weight: var(--font-weight-medium);
}

.quiz-history-stat-value {
  font-size: 1.4rem;
  font-weight: var(--font-weight-bold);
  color: var(--green);
}

.quiz-history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.quiz-history-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.55rem 0.85rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--green);
}

.quiz-history-lesson {
  color: var(--white);
  font-weight: var(--font-weight-medium);
  font-size: 0.92rem;
}

.quiz-history-meta {
  font-size: 0.78rem;
  color: var(--text);
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.quiz-history-when {
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-left: auto;
}

/* -------------------------------------------------------
   41. AI STEAM Plus — Tier 4 project / capstone CTAs
   ------------------------------------------------------- */

/* End-of-unit project CTA in the lesson page */
.unit-project-cta {
  background: linear-gradient(135deg, rgba(123,94,167,0.10) 0%, rgba(0,255,136,0.06) 100%);
  border: 1px solid rgba(123,94,167,0.30);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
}

.unit-project-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-lg);
}

.unit-project-text { min-width: 0; }

.unit-project-title {
  font-size: 1.15rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  margin-bottom: 0.4rem;
}

.unit-project-desc {
  color: var(--text);
  margin: 0 0 0.5rem 0;
  line-height: var(--line-height-body);
}

.unit-project-deliv {
  color: var(--purple-light);
  font-size: 0.92rem;
  margin: 0;
}

.unit-project-deliv strong {
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-size: 0.78rem;
  font-weight: var(--font-weight-bold);
  color: var(--purple-light);
}

.unit-project-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1.4rem;
  background: linear-gradient(135deg, #7B5EA7 0%, #00FF88 100%);
  border: none;
  border-radius: 999px;
  color: #020812;
  font-weight: var(--font-weight-bold);
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 4px 18px rgba(123,94,167,0.35);
  transition: transform 0.15s, box-shadow 0.2s;
}

.unit-project-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0,255,136,0.4);
}

@media (max-width: 720px) {
  .unit-project-card { grid-template-columns: 1fr; }
}

/* Capstone CTA in the dashboard — surfaces year-end project for any grade */
.capstone-cta-card {
  background: linear-gradient(135deg, rgba(255,215,0,0.06) 0%, rgba(123,94,167,0.10) 50%, rgba(0,255,136,0.06) 100%);
  border: 1px solid rgba(255,215,0,0.25);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-lg);
  align-items: center;
}

.capstone-cta-icon {
  font-size: 2.2rem;
  flex-shrink: 0;
}

.capstone-cta-text { min-width: 0; }

.capstone-cta-eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-weight: var(--font-weight-bold);
  color: #ffd84d;
  margin-bottom: 0.3rem;
}

.capstone-cta-title {
  font-size: 1.2rem;
  font-weight: var(--font-weight-bold);
  color: #fff;
  margin-bottom: 0.3rem;
}

.capstone-cta-desc {
  color: var(--text);
  margin: 0;
  line-height: 1.5;
}

.capstone-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.85rem 1.6rem;
  background: linear-gradient(135deg, #ffd84d 0%, #b53015 100%);
  border: none;
  border-radius: 999px;
  color: #020812;
  font-weight: var(--font-weight-bold);
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  box-shadow: 0 4px 18px rgba(255,216,77,0.35);
  transition: transform 0.15s, box-shadow 0.2s;
}

.capstone-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(255,216,77,0.55);
}

@media (max-width: 720px) {
  .capstone-cta-card { grid-template-columns: 1fr; text-align: center; }
}

/* -------------------------------------------------------
   42. AI STEAM Plus — Tier 5 ET+ CTA + PWA install prompt
   ------------------------------------------------------- */

.ai-support-actions {
  margin-top: var(--space-md);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.ask-et-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.2rem;
  background: linear-gradient(135deg, #00B4FF 0%, #00FF88 100%);
  border: none;
  border-radius: 999px;
  color: #020812;
  font-weight: var(--font-weight-bold);
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 4px 16px rgba(0, 200, 255, 0.3);
  transition: transform 0.15s, box-shadow 0.2s;
}

.ask-et-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(0, 255, 136, 0.45);
}

/* PWA install prompt — appears at bottom-right when the browser
   fires beforeinstallprompt. Hidden by default. */
.pwa-install-prompt {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 800;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: 360px;
  font-family: var(--font-family);
  color: var(--text);
}

.pwa-install-prompt-text { flex: 1; min-width: 0; }
.pwa-install-prompt-title { color: var(--white); font-weight: 700; margin-bottom: 0.2rem; font-size: 0.95rem; }
.pwa-install-prompt-body { font-size: 0.84rem; color: var(--text-muted); line-height: 1.45; }

.pwa-install-btn {
  background: var(--green);
  color: #020812;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-full);
  padding: 0.55rem 1.1rem;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.pwa-install-btn:hover { background: var(--green-dark); }

.pwa-install-dismiss {
  background: transparent;
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0 0.35rem;
}

.pwa-install-dismiss:hover { color: var(--white); }

/* Offline banner — shown when service worker reports navigator is offline */
.pwa-offline-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  background: var(--warning);
  color: #020812;
  text-align: center;
  padding: 0.4rem;
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 0.85rem;
}

/* -------------------------------------------------------
   43. AI STEAM Plus — i18n (locale switcher + RTL support)
   ------------------------------------------------------- */

.aisteam-locale-switcher select {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-md);
  color: var(--text);
  padding: 0.35rem 0.55rem;
  font-family: inherit;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'><path d='M2 4l3 3 3-3' stroke='%23999' fill='none' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat;
  background-position: right 0.4rem center;
  padding-right: 1.5rem;
}

.aisteam-locale-switcher select:hover {
  border-color: var(--green);
  color: var(--white);
}

.aisteam-locale-switcher select:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.25);
}

/* Floating fallback location for the switcher (when there's no
   topbar mount point — e.g., some lab pages). */
.aisteam-locale-switcher.aisteam-locale-floating {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 200;
}

/* RTL mirrored layout — used when a right-to-left locale is active.
   The Latin font stack still works for Arabic since Inter handles
   Arabic glyphs reasonably; specific Arabic font would need to be
   self-hosted (similar to JetBrains Mono / Inter for Latin). */
html[dir="rtl"] .sidebar {
  left: auto;
  right: 0;
  border-right: none;
  border-left: 1px solid rgba(123, 94, 167, 0.12);
}

html[dir="rtl"] .main-content {
  margin-left: 0;
  margin-right: 220px;
}

html[dir="rtl"] .sidebar-item {
  border-left: none;
  border-right: 3px solid transparent;
}

html[dir="rtl"] .sidebar-item.active {
  border-left-color: transparent;
  border-right-color: var(--green);
}

html[dir="rtl"] .lesson-part-section {
  border-left: none;
  border-right: 3px solid var(--border);
}

html[dir="rtl"] .differentiation-card {
  border-left: none;
  border-right-width: 4px;
  border-right-style: solid;
}

html[dir="rtl"] .differentiation-support {
  border-right-color: var(--green);
}

html[dir="rtl"] .differentiation-challenge {
  border-right-color: var(--warning);
}

html[dir="rtl"] .misconception-card {
  border-left: none;
  border-right: 4px solid var(--danger);
}

html[dir="rtl"] .quiz-history-item {
  border-left: none;
  border-right: 3px solid var(--green);
}

html[dir="rtl"] .lesson-part-assessment {
  border-left: none;
  border-right: 3px solid var(--green);
}

html[dir="rtl"] .pwa-install-prompt {
  right: auto;
  left: 24px;
}

/* RTL mobile sidebar slide-in */
@media (max-width: 768px) {
  html[dir="rtl"] .sidebar {
    transform: translateX(100%);
  }
  html[dir="rtl"] .sidebar.open {
    transform: translateX(0);
  }
  html[dir="rtl"] .main-content {
    margin-right: 0;
  }
}

/* Slightly looser line-height for Arabic + Chinese — both render
   taller glyphs than Latin */
html.i18n-ar body, html.i18n-zh body { line-height: 1.7; }

/* -------------------------------------------------------
   44. AI STEAM Plus — Skill Spine (KG3 → G12 progression)
   ------------------------------------------------------- */

#skillSpineTracks {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.skill-track {
  background: rgba(255, 255, 255, 0.025);
  border-left: 3px solid var(--thread-color, var(--green));
  border-radius: var(--radius-md);
  padding: 0.65rem 0.95rem;
}

.skill-track-header {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.55rem;
  font-size: 0.92rem;
}

.skill-track-icon { font-size: 1.05rem; }

.skill-track-label {
  color: var(--white);
  font-weight: var(--font-weight-semibold);
  flex: 1;
  min-width: 0;
}

.skill-track-progress {
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.skill-track-line {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: 0.25rem;
  padding: 0.15rem 0;
  position: relative;
}

/* Connecting line behind the dots — shows the "spine" continuity */
.skill-track-line::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 12px;
  right: 12px;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    var(--thread-color, var(--green)) 12%,
    var(--thread-color, var(--green)) 88%,
    transparent 100%
  );
  opacity: 0.28;
  z-index: 0;
}

.skill-dot {
  position: relative;
  z-index: 1;
  height: 30px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.62rem;
  font-weight: var(--font-weight-bold);
  cursor: help;
  transition: transform 0.12s, box-shadow 0.18s;
  text-align: center;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.skill-dot-empty {
  background: transparent;
  border-style: dashed;
  border-color: rgba(255, 255, 255, 0.06);
  opacity: 0.35;
}

.skill-dot-locked {
  /* Available in this grade but no lessons completed yet */
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.18);
  color: var(--text-muted);
}

.skill-dot-partial {
  background: linear-gradient(135deg, rgba(255,255,255,0.04), color-mix(in srgb, var(--thread-color, #00FF88) 22%, transparent));
  border-color: var(--thread-color, var(--green));
  color: var(--white);
}

.skill-dot-full {
  background: var(--thread-color, var(--green));
  border-color: var(--thread-color, var(--green));
  color: #020812;
  box-shadow: 0 0 12px color-mix(in srgb, var(--thread-color, #00FF88) 40%, transparent);
}

.skill-dot:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.4);
}

.skill-dot-label {
  pointer-events: none;
  user-select: none;
  letter-spacing: 0.5px;
}

/* Compact view on narrow screens */
@media (max-width: 720px) {
  .skill-track-line {
    grid-template-columns: repeat(13, minmax(20px, 1fr));
    gap: 0.15rem;
  }
  .skill-dot { height: 24px; }
  .skill-dot-label { font-size: 0.55rem; }
}

html[dir="rtl"] .skill-track {
  border-left: none;
  border-right: 3px solid var(--thread-color, var(--green));
}

/* -------------------------------------------------------
   45. AI STEAM Plus — Skill Spine click-through modal
   ------------------------------------------------------- */

.skill-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(2, 8, 18, 0.78);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: aisteam-fade-in 0.18s ease-out;
}

@keyframes aisteam-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.skill-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: min(640px, 100%);
  max-height: min(80vh, 720px);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  font-family: var(--font-family);
  animation: aisteam-pop-in 0.22s cubic-bezier(0.34, 1.32, 0.64, 1);
}

/* Skill-dot keyboard focus ring — explicit so keyboard / screen-reader
 * users can see which dot will fire on Enter/Space. Falls under the
 * existing :hover rule's :focus-visible cousin. */
.skill-dot:focus-visible {
  outline: 2px solid var(--thread-color, #00FF88);
  outline-offset: 3px;
}

/* Skill-track progress percentage — replaces the inline opacity:0.6
 * which sat at the WCAG AA contrast edge. 0.78 gives a clean
 * separation while keeping the visual hierarchy. */
.skill-track-progress-pct {
  opacity: 0.78;
  font-size: 0.85em;
}

/* ── Adaptive pacing chip (dashboard hint) ─────────────── */
.pacing-chip {
  display: flex; gap: 0.85rem; align-items: flex-start;
  padding: 0.85rem 1.1rem;
  margin: 1rem auto;
  max-width: 1200px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--green, #96D35F);
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
}
.pacing-chip-fast { border-left-color: #00FF88; }
.pacing-chip-remediate { border-left-color: #ffa05c; }
.pacing-chip-stay { border-left-color: #9AA6BD; }
.pacing-chip-icon {
  font-size: 1.4rem; line-height: 1.2;
  flex-shrink: 0;
}
.pacing-chip-body { flex: 1; min-width: 0; }
.pacing-chip-label {
  font-size: 0.95rem; font-weight: 700;
  color: var(--text-primary, #C7D0E0);
  margin-bottom: 0.2rem;
  letter-spacing: 0.2px;
}
.pacing-chip-reason {
  font-size: 0.86rem; line-height: 1.45;
  color: var(--text-secondary, #9AA6BD);
}
@media (prefers-contrast: more) {
  .pacing-chip-reason { color: var(--text-primary, #C7D0E0); }
}

/* ── Capstone Showcase (G12 cohort gallery + submit modal) ─ */
.cap-showcase-section {
  max-width: 1200px;
  margin: 3rem auto 4rem;
  padding: 0 1.5rem;
}
.cap-showcase-head {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 0.8rem;
  margin-bottom: 0.5rem;
}
.cap-showcase-title {
  font-size: 1.6rem; font-weight: 700;
  color: var(--text-primary, #C7D0E0); margin: 0;
}
.cap-showcase-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.cap-showcase-sub {
  color: var(--text-secondary, #9AA6BD);
  font-size: 0.92rem; margin-bottom: 1.2rem;
}
.cap-showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.2rem;
}
.cap-showcase-empty {
  grid-column: 1 / -1;
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--text-secondary, #9AA6BD);
  background: var(--surface);
  border: 1px dashed rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
}
.cap-showcase-empty.cap-showcase-err { color: #ff6b6b; border-color: rgba(255,107,107,0.4); }
.cap-showcase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.2rem; display: flex; flex-direction: column; gap: 0.5rem;
  transition: transform 0.16s, border-color 0.16s, box-shadow 0.16s;
  position: relative;
}
.cap-showcase-card:hover {
  transform: translateY(-2px);
  border-color: rgba(150,211,95,0.35);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}
.cap-card-venue {
  display: inline-block; align-self: flex-start;
  padding: 0.18rem 0.55rem; border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem; letter-spacing: 0.08em;
  background: rgba(150,211,95,0.12);
  color: var(--green, #96D35F);
  border: 1px solid rgba(150,211,95,0.3);
}
.cap-card-date {
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem; color: var(--text-secondary, #9AA6BD);
}
.cap-card-title {
  font-size: 1.1rem; font-weight: 700; line-height: 1.3;
  color: var(--text-primary, #C7D0E0); margin: 0.2rem 0 0;
}
.cap-card-author {
  font-size: 0.82rem; color: var(--text-secondary, #9AA6BD);
}
.cap-card-abstract {
  font-size: 0.88rem; line-height: 1.45;
  color: var(--text-secondary, #9AA6BD);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0.3rem 0;
}
.cap-card-skills { display: flex; gap: 0.35rem; flex-wrap: wrap; margin-top: auto; }
.cap-card-skill {
  font-size: 0.7rem; padding: 0.18rem 0.55rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 999px; color: var(--text-secondary, #9AA6BD);
}
.cap-card-skill-more { background: rgba(150,211,95,0.05); color: var(--green, #96D35F); }
.cap-card-links { display: flex; gap: 0.7rem; flex-wrap: wrap; margin-top: 0.4rem; }
.cap-card-link {
  font-size: 0.82rem; color: var(--green, #96D35F); font-weight: 600;
  text-decoration: none; transition: color 0.16s;
}
.cap-card-link:hover { color: #fff; }
.cap-card-link:focus-visible { outline: 2px solid var(--green, #96D35F); outline-offset: 2px; }
.cap-btn {
  padding: 0.55rem 1.2rem; border-radius: 999px; font-size: 0.88rem; font-weight: 700;
  cursor: pointer; transition: all 0.16s; font-family: inherit; border: 1px solid transparent;
}
.cap-btn:focus-visible { outline: 2px solid var(--green, #96D35F); outline-offset: 2px; }
.cap-btn-primary { background: var(--green, #96D35F); color: #02060E; }
.cap-btn-primary:hover { background: #fff; }
.cap-btn-ghost {
  background: transparent; color: var(--text-primary, #C7D0E0);
  border-color: rgba(255,255,255,0.15);
}
.cap-btn-ghost:hover { border-color: var(--green, #96D35F); color: var(--green, #96D35F); }
.cap-btn-secondary {
  background: rgba(255,255,255,0.04); color: var(--text-primary, #C7D0E0);
  border-color: rgba(255,255,255,0.1);
}

/* Submit modal */
.cap-submit-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(2,8,18,0.78); backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.cap-submit-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: min(640px, 100%);
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  padding: 1.6rem;
  font-family: var(--font-family);
}
.cap-submit-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 1.2rem;
}
.cap-submit-header h3 { margin: 0; font-size: 1.3rem; color: var(--text-primary, #C7D0E0); }
.cap-submit-close {
  background: transparent; border: 0; color: var(--text-secondary, #9AA6BD);
  font-size: 1.6rem; cursor: pointer;
}
.cap-submit-close:hover { color: var(--text-primary, #C7D0E0); }
.cap-submit-form { display: flex; flex-direction: column; gap: 0.85rem; }
.cap-submit-form label {
  display: flex; flex-direction: column; gap: 0.3rem;
  font-size: 0.82rem; color: var(--text-secondary, #9AA6BD);
}
.cap-submit-form input,
.cap-submit-form textarea {
  padding: 0.6rem 0.85rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  color: var(--text-primary, #C7D0E0);
  font-family: inherit; font-size: 0.92rem;
}
.cap-submit-form input:focus,
.cap-submit-form textarea:focus {
  outline: 2px solid var(--green, #96D35F); outline-offset: 1px;
  border-color: rgba(150,211,95,0.4);
}
.cap-submit-actions {
  display: flex; gap: 0.6rem; justify-content: flex-end;
  margin-top: 0.5rem;
}
.cap-submit-status {
  text-align: right; font-size: 0.85rem;
  color: var(--text-secondary, #9AA6BD); min-height: 1.2rem;
}
.cap-submit-status.is-ok { color: var(--green, #96D35F); font-weight: 700; }
.cap-submit-status.is-err { color: #ff6b6b; }
@media (prefers-reduced-motion: reduce) {
  .cap-showcase-card { transition: none; }
  .cap-btn { transition: none; }
  .cap-card-link { transition: none; }
}

/* ── Vocabulary SRS (spaced-repetition flashcards) ──────────
 * Mounted by assets/js/vocab-srs.js into a host element. Cyberpunk
 * theme aligned with the rest of the dashboard. */
.aisteam-vocab-srs { display: block; padding: 1rem 0; }
.vocab-srs-root {
  max-width: 720px; margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2rem;
  font-family: var(--font-family);
}
.vocab-srs-header { margin-bottom: 1.4rem; text-align: center; }
.vocab-srs-eyebrow {
  font-family: var(--font-mono, monospace);
  font-size: 0.7rem; letter-spacing: 0.22em;
  color: var(--green, #96D35F); text-transform: uppercase;
}
.vocab-srs-title {
  font-size: 1.6rem; font-weight: 700;
  margin: 0.3rem 0 0.5rem; color: var(--text-primary, #C7D0E0);
}
.vocab-srs-meta {
  font-family: var(--font-mono, monospace);
  font-size: 0.8rem; color: var(--text-secondary, #9AA6BD);
}
.vocab-srs-card {
  background: linear-gradient(135deg, rgba(150,211,95,0.05) 0%, rgba(150,211,95,0.01) 100%);
  border: 1px solid rgba(150,211,95,0.18);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  min-height: 240px;
  display: flex; flex-direction: column; justify-content: center;
}
.vocab-srs-prompt { text-align: center; }
.vocab-srs-unit {
  font-size: 0.78rem; color: var(--text-secondary, #9AA6BD);
  font-family: var(--font-mono, monospace);
  margin-bottom: 1rem;
  text-transform: uppercase; letter-spacing: 0.12em;
}
.vocab-srs-term {
  font-size: 2.1rem; font-weight: 700;
  color: var(--text-primary, #C7D0E0);
  margin-bottom: 1.4rem;
  line-height: 1.2;
}
.vocab-srs-reveal {
  background: var(--green, #96D35F); color: #02060E;
  border: 0; border-radius: 999px;
  padding: 0.7rem 1.6rem; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; transition: transform 0.16s, box-shadow 0.16s;
  font-family: inherit;
}
.vocab-srs-reveal:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(150,211,95,0.35); }
.vocab-srs-reveal:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }
.vocab-srs-answer {
  margin-top: 1.4rem; padding-top: 1.4rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.vocab-srs-definition {
  font-size: 1.1rem; line-height: 1.5; text-align: center;
  color: var(--text-primary, #C7D0E0);
  margin-bottom: 1.4rem;
}
.vocab-srs-quality { text-align: center; }
.vocab-srs-quality-prompt {
  font-size: 0.85rem; color: var(--text-secondary, #9AA6BD);
  margin-bottom: 0.8rem;
}
.vocab-srs-quality-buttons {
  display: flex; gap: 0.5rem; justify-content: center; flex-wrap: wrap;
}
.vocab-srs-q-btn {
  background: rgba(255,255,255,0.04);
  color: var(--text-primary, #C7D0E0);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px;
  padding: 0.55rem 1.05rem;
  font-size: 0.85rem; font-weight: 600;
  cursor: pointer; transition: all 0.16s; font-family: inherit;
}
.vocab-srs-q-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
}
.vocab-srs-q-btn:focus-visible { outline: 2px solid var(--green, #96D35F); outline-offset: 2px; }
.vocab-srs-q-0 { color: #ff6b6b; }
.vocab-srs-q-2 { color: #ffa05c; }
.vocab-srs-q-3 { color: #ffd866; }
.vocab-srs-q-4 { color: #96D35F; }
.vocab-srs-q-5 { color: #00FFD2; }
.vocab-srs-loading, .vocab-srs-empty {
  text-align: center; padding: 2rem 0;
  color: var(--text-secondary, #9AA6BD);
  font-family: var(--font-mono, monospace);
  font-size: 0.9rem;
}
@media (max-width: 640px) {
  .vocab-srs-root { padding: 1.2rem; }
  .vocab-srs-term { font-size: 1.7rem; }
}
@media (prefers-reduced-motion: reduce) {
  .vocab-srs-reveal { transition: none; }
  .vocab-srs-q-btn { transition: none; }
}
@media (prefers-contrast: more) {
  .vocab-srs-meta, .vocab-srs-unit, .vocab-srs-quality-prompt {
    color: var(--text-primary, #C7D0E0);
  }
}

/* prefers-contrast: more — users who request high contrast get full
 * opacity on faded helper text + thicker focus outlines. */
@media (prefers-contrast: more) {
  .skill-track-progress-pct { opacity: 1; }
  .skill-modal-next-thread { color: var(--text-primary, #C7D0E0); }
  .skill-modal-next-count { color: var(--text-primary, #C7D0E0); }
  .skill-dot:focus-visible { outline-width: 3px; }
  .skill-modal-next-btn:focus-visible { outline-width: 3px; }
}

/* "Up next" preview row inside the skill-lesson modal — additive UX
 * showing the trajectory beyond current grade in this skill thread.
 * Renders only when the next grade has at least 1 lesson tagged with
 * the current thread. */
.skill-modal-next {
  margin-top: 1.25rem;
  padding: 0.85rem 1rem;
  background: linear-gradient(135deg, rgba(150, 211, 95, 0.06) 0%, rgba(150, 211, 95, 0.02) 100%);
  border: 1px solid rgba(150, 211, 95, 0.18);
  border-radius: var(--radius-lg);
}
.skill-modal-next-eyebrow {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: var(--green, #96D35F);
  margin-bottom: 0.4rem;
  font-weight: 700;
}
.skill-modal-next-row {
  display: flex; align-items: center; gap: 0.8rem; flex-wrap: wrap;
}
.skill-modal-next-grade {
  font-weight: 700; font-size: 0.95rem; color: var(--text-primary, #C7D0E0);
  letter-spacing: 0.4px;
}
.skill-modal-next-thread {
  flex: 1; min-width: 0; color: var(--text-secondary, #9AA6BD);
  font-size: 0.86rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.skill-modal-next-count {
  color: var(--text-secondary, #9AA6BD);
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  padding: 0.18rem 0.55rem;
  background: rgba(255,255,255,0.04);
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.06);
}
.skill-modal-next-btn {
  background: transparent;
  color: var(--green, #96D35F);
  border: 1px solid var(--green, #96D35F);
  padding: 0.36rem 0.95rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.16s;
  font-family: inherit;
}
.skill-modal-next-btn:hover {
  background: var(--green, #96D35F);
  color: #02060E;
}
.skill-modal-next-btn:focus-visible {
  outline: 2px solid var(--green, #96D35F);
  outline-offset: 2px;
}
@media (max-width: 640px) {
  .skill-modal-next-row { gap: 0.5rem; }
  .skill-modal-next-thread { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .skill-modal-next-btn { transition: none; }
}

/* On phones (≤640px) drop the overlay padding so the modal uses more
 * of the viewport, and let it fill the available height so long lesson
 * lists don't push the close button off-screen. */
@media (max-width: 640px) {
  .skill-modal-overlay { padding: 0.75rem; }
  .skill-modal {
    width: 100%;
    max-height: calc(100vh - 1.5rem);
    border-radius: var(--radius-lg);
  }
}

@keyframes aisteam-pop-in {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

.skill-modal-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.25rem;
  background: linear-gradient(135deg, var(--thread-color, var(--green)) 0%, transparent 200%);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.skill-modal-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 0;
}

.skill-modal-header > * { position: relative; z-index: 1; }

.skill-modal-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
}

.skill-modal-titles { flex: 1; min-width: 0; }

.skill-modal-eyebrow {
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 0.18rem;
}

.skill-modal-title {
  font-size: 1.15rem;
  font-weight: var(--font-weight-bold);
  color: var(--white);
  margin: 0;
}

.skill-modal-close {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  width: 32px;
  height: 32px;
  font-size: 1.2rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.skill-modal-close:hover {
  background: rgba(255, 71, 87, 0.85);
}

.skill-modal-body {
  padding: 1.25rem;
  overflow-y: auto;
  background: var(--navy-light);
}

.skill-modal-lesson-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.skill-modal-lesson {
  display: grid;
  grid-template-columns: auto auto 1fr auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.6rem 0.85rem;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  transition: all 0.15s;
}

.skill-modal-lesson:hover {
  border-color: var(--green);
  background: rgba(0, 255, 136, 0.05);
}

.skill-modal-lesson.is-done {
  background: rgba(0, 255, 136, 0.07);
  border-color: rgba(0, 255, 136, 0.28);
}

.skill-modal-lesson-check {
  font-size: 1.1rem;
  font-weight: var(--font-weight-bold);
  color: var(--text-muted);
  width: 1.2rem;
  text-align: center;
}

.skill-modal-lesson.is-done .skill-modal-lesson-check {
  color: var(--green);
}

.skill-modal-lesson-meta {
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.skill-modal-lesson-title {
  color: var(--text);
  font-size: 0.92rem;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.skill-modal-lesson.is-done .skill-modal-lesson-title { color: var(--white); }

.skill-modal-lesson-open {
  font-family: var(--font-family-mono, ui-monospace, 'SF Mono', monospace);
  font-size: 0.7rem;
  color: var(--green);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: var(--font-weight-bold);
  padding: 0.3rem 0.65rem;
  border: 1px solid rgba(0, 255, 136, 0.3);
  border-radius: var(--radius-full);
  white-space: nowrap;
  transition: all 0.15s;
}

.skill-modal-lesson-open:hover {
  background: var(--green);
  color: #020812;
}

@media (max-width: 720px) {
  .skill-modal { max-height: 92vh; }
  .skill-modal-lesson { grid-template-columns: auto 1fr auto; gap: 0.5rem; }
  .skill-modal-lesson-meta { display: none; }
}

html[dir="rtl"] .skill-modal-header {
  background: linear-gradient(225deg, var(--thread-color, var(--green)) 0%, transparent 200%);
}

/* ============================================================
 * Section 45 — Study Insights (Phase C, 2026-05-08)
 * Time on task / Lab completion / Vocab SRS chip widgets.
 * ============================================================ */
.study-insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 0.5rem;
}
.insight-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.25rem;
}
.insight-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.insight-body { display: flex; flex-direction: column; gap: 0.5rem; }
.widget-row {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.875rem;
}
.widget-label { color: rgba(255, 255, 255, 0.65); }
.widget-value {
  font-weight: 700;
  color: var(--accent-green, #00FF88);
  font-family: 'JetBrains Mono', monospace;
}
.widget-empty {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
  font-style: italic;
}
.widget-circle {
  display: flex; flex-direction: column; align-items: center;
  gap: 0.25rem; padding: 0.5rem 0;
}
.widget-circle-num {
  font-size: 1.875rem; font-weight: 800;
  color: var(--accent-cyan, #00B4FF);
  font-family: 'JetBrains Mono', monospace;
}
.widget-circle-label {
  font-size: 0.7rem; color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.vocab-chip-link {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.6rem 1rem; border-radius: 9999px;
  background: linear-gradient(135deg, rgba(123, 94, 167, 0.25), rgba(0, 255, 136, 0.18));
  border: 1px solid rgba(123, 94, 167, 0.4);
  color: var(--accent-green, #00FF88);
  font-weight: 600; font-size: 0.875rem;
  text-decoration: none;
  transition: transform 0.15s ease;
}
.vocab-chip-link:hover { transform: translateY(-1px); }

@media (max-width: 720px) {
  .study-insights-grid { grid-template-columns: 1fr; }
  .insight-card { padding: 1rem; }
}

/* Welcome-banner continuity cue (Phase C, 2026-05-08) */
.green-quiet {
  color: rgba(0, 255, 136, 0.55);
  font-weight: 500;
  font-size: 0.875em;
  font-style: italic;
}

/* ============================================================
 * Standards alignment + authoritative-source plan
 * (Phase D/E — 2026-05-08 authoritative rebuild)
 * ============================================================ */
.standards-alignment {
  background: rgba(123,94,167,0.05);
  border-color: rgba(123,94,167,0.18);
}
.standards-grid {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.75rem;
}
.standard-chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.4rem 0.85rem; border-radius: 9999px;
  background: rgba(123,94,167,0.18);
  border: 1px solid rgba(123,94,167,0.4);
  font-size: 0.82rem;
}
.standard-chip strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; color: #b29ee0;
  text-transform: uppercase; letter-spacing: 0.05em;
}

.authoritative-plan {
  background: linear-gradient(135deg, rgba(0,180,255,0.04) 0%, rgba(0,255,136,0.03) 100%);
  border-color: rgba(0,180,255,0.18);
}
.auth-sections { display: flex; flex-direction: column; gap: 1rem; margin-top: 0.75rem; }
.auth-section {
  padding: 0.85rem 1rem;
  border-left: 3px solid rgba(0,180,255,0.4);
  background: rgba(0,180,255,0.04);
  border-radius: 0 6px 6px 0;
}
.auth-section-head {
  display: flex; align-items: center; gap: 0.5rem; margin-bottom: 0.4rem;
}
.auth-section-timing {
  font-family: 'JetBrains Mono', monospace; font-size: 0.7rem;
  text-transform: uppercase; letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem; border-radius: 4px;
  background: rgba(0,180,255,0.18); color: #6ec5ff;
}
.auth-section-label {
  font-weight: 600; color: rgba(255,255,255,0.92); font-size: 0.95rem;
}
.auth-section-body p {
  color: rgba(255,255,255,0.78); line-height: 1.6; margin: 0.35rem 0;
}
.auth-materials {
  display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center;
  margin-top: 0.85rem; padding-top: 0.85rem;
  border-top: 1px dashed rgba(255,255,255,0.08);
  font-size: 0.85rem; color: rgba(255,255,255,0.7);
}
.auth-materials .material-tag {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 0.15rem 0.55rem; border-radius: 4px; font-size: 0.78rem;
  color: rgba(255,255,255,0.85);
}
.auth-callouts {
  display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.85rem;
}
.auth-callout {
  padding: 0.6rem 0.9rem; border-radius: 6px; font-size: 0.85rem;
  border: 1px solid transparent; line-height: 1.5;
}
.auth-callout-sim { background: rgba(0,180,255,0.06); border-color: rgba(0,180,255,0.2); color: #d6e9ff; }
.auth-callout-ai { background: rgba(0,255,136,0.06); border-color: rgba(0,255,136,0.2); color: #d6ffe8; }
.auth-callout-misc { background: rgba(255,77,77,0.06); border-color: rgba(255,77,77,0.2); color: #ffd6d6; }
.auth-callout-hw { background: rgba(255,165,2,0.06); border-color: rgba(255,165,2,0.2); color: #ffe4b5; }

@media (max-width: 720px) {
  .auth-section { padding: 0.7rem 0.85rem; }
  .auth-section-head { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
}

/* ============================================================
 * Section 46 — WCAG 2.1 AA accessibility (Phase 9, 2026-05-08)
 * ============================================================ */
.aisteam-skip-link {
  position: absolute; top: -40px; left: 0;
  background: #00FF88; color: #0A0F1E;
  padding: 0.5rem 1rem; font-weight: 700;
  text-decoration: none; z-index: 10000;
  transition: top 0.2s;
}
.aisteam-skip-link:focus {
  top: 0;
  outline: 3px solid #FFFFFF;
}

/* High-contrast mode (prefers-contrast: more) */
.aisteam-high-contrast .widget-label,
.aisteam-high-contrast .widget-empty,
.aisteam-high-contrast .stat-label,
.aisteam-high-contrast .auth-section-body p,
.aisteam-high-contrast .steam-hint-body,
.aisteam-high-contrast .insight-body {
  color: rgba(255, 255, 255, 0.95) !important;
}
.aisteam-high-contrast .vocab-card-item,
.aisteam-high-contrast .quiz-q,
.aisteam-high-contrast .insight-card,
.aisteam-high-contrast .auth-section,
.aisteam-high-contrast .standard-chip {
  border-width: 2px !important;
}
.aisteam-high-contrast a:focus-visible,
.aisteam-high-contrast button:focus-visible,
.aisteam-high-contrast input:focus-visible,
.aisteam-high-contrast [tabindex]:focus-visible {
  outline: 3px solid #00FF88 !important;
  outline-offset: 2px !important;
}

/* Default focus-visible — applied always */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid #00FF88;
  outline-offset: 2px;
}

/* ============================================================
 * Section 47 — Free-text quiz grader (item 11, 2026-05-08)
 * ============================================================ */
.quiz-q-free-text { margin-top: 1rem; }
.quiz-rubric { margin: 0.5rem 0; }
.quiz-rubric summary {
  cursor: pointer; font-size: 0.85rem;
  color: rgba(255,255,255,0.65); user-select: none;
}
.quiz-rubric ul {
  list-style: '• '; padding-left: 1.5rem; margin: 0.5rem 0;
  color: rgba(255,255,255,0.78); font-size: 0.85rem;
}
.quiz-free-text-input {
  width: 100%; min-height: 6rem; padding: 0.75rem;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  color: #FFFFFF; font-family: inherit; font-size: 0.95rem;
  resize: vertical; line-height: 1.5;
}
.quiz-free-text-input:focus {
  outline: 2px solid #00FF88; outline-offset: 2px;
  border-color: rgba(0, 255, 136, 0.5);
}
.quiz-free-text-actions {
  display: flex; align-items: center; gap: 1rem;
  margin-top: 0.6rem;
}
.quiz-free-text-status {
  font-size: 0.85rem; color: rgba(255,255,255,0.6);
}
.free-text-grading-card {
  margin-top: 1rem; padding: 1rem;
  background: rgba(0, 180, 255, 0.06);
  border: 1px solid rgba(0, 180, 255, 0.2);
  border-radius: 8px;
}
.free-text-grading-head {
  display: flex; align-items: center; gap: 1rem; margin-bottom: 0.5rem;
}
.free-text-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem; font-weight: 800;
  padding: 0.3rem 0.8rem; border-radius: 9999px;
}
.free-text-score-success { background: rgba(0,255,136,0.18); color: #00FF88; }
.free-text-score-mid { background: rgba(255,165,2,0.18); color: #ffa500; }
.free-text-score-low { background: rgba(255,77,77,0.18); color: #ff4d4d; }
.free-text-score-unknown { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.7); }
.free-text-feedback {
  color: #d6e9ff; line-height: 1.55; margin: 0.5rem 0;
  font-size: 0.95rem;
}
.free-text-rubric-list {
  list-style: none; padding: 0; margin: 0.5rem 0 0;
  display: flex; flex-direction: column; gap: 0.25rem;
  font-size: 0.85rem;
}
.rubric-hit { color: #00FF88; }
.rubric-miss { color: rgba(255,255,255,0.55); }
.free-text-missing {
  margin-top: 0.75rem; padding-top: 0.5rem;
  border-top: 1px dashed rgba(255,255,255,0.1);
  font-size: 0.85rem; color: rgba(255,255,255,0.7);
}

/* ============================================
 * Section 48 — Project arcs widget (item 15 follow-on, 2026-05-09)
 * ============================================ */
.pa-section-header { margin-bottom: 1rem; }
.pa-section-header h2 {
  margin: 0 0 0.25rem 0;
  font-size: 1.15rem; color: #E8F5D9; font-weight: 600;
}
.pa-section-sub {
  margin: 0; font-size: 0.85rem; color: #9AA6BD;
}
.pa-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.pa-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(154,166,189,0.2);
  border-radius: 14px; padding: 1rem 1.1rem;
  border-left: 3px solid var(--pa-accent, #96D35F);
  transition: border-color 0.18s ease, transform 0.18s ease;
}
.pa-card:hover {
  border-color: var(--pa-accent, #96D35F);
}
.pa-header {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 0.75rem; margin-bottom: 0.5rem;
}
.pa-title {
  margin: 0; font-size: 0.98rem; color: #E8F5D9; font-weight: 600;
}
.pa-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.18em;
  color: #5C6478; text-transform: uppercase;
  flex-shrink: 0;
}
.pa-progress {
  position: relative;
  background: rgba(154,166,189,0.15);
  height: 8px; border-radius: 4px; overflow: hidden;
  margin-bottom: 0.85rem;
}
.pa-progress-fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  background: var(--pa-accent, #96D35F);
  transition: width 0.32s ease;
}
.pa-progress-label {
  display: block; margin-top: 0.4rem;
  font-size: 0.72rem; color: #9AA6BD;
  letter-spacing: 0.04em;
}
.pa-milestone-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.35rem;
  margin-bottom: 0.85rem;
}
.pa-milestone {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.85rem;
  padding: 0.3rem 0.4rem; border-radius: 6px;
  transition: background 0.15s ease;
}
.pa-milestone:hover { background: rgba(255,255,255,0.03); }
.pa-ms-toggle {
  width: 22px; height: 22px; flex-shrink: 0;
  border: 1.5px solid rgba(154,166,189,0.4);
  background: transparent; color: #9AA6BD;
  border-radius: 50%; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; line-height: 1;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.pa-ms-toggle:hover {
  border-color: var(--pa-accent, #96D35F);
  color: var(--pa-accent, #96D35F);
}
.pa-ms-toggle:focus-visible {
  outline: 2px solid var(--pa-accent, #96D35F);
  outline-offset: 2px;
}
.pa-ms-done .pa-ms-toggle {
  background: var(--pa-accent, #96D35F);
  border-color: var(--pa-accent, #96D35F);
  color: #05060B;
}
.pa-ms-label {
  flex: 1; color: #C7D0E0;
}
.pa-ms-done .pa-ms-label {
  color: #9AA6BD; text-decoration: line-through;
}
.pa-ms-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem; color: #5C6478;
  flex-shrink: 0;
}
.pa-footer {
  display: flex; justify-content: flex-end;
  border-top: 1px dashed rgba(154,166,189,0.2);
  padding-top: 0.65rem;
}
.pa-deliverable-link, .pa-deliverable-set {
  font-size: 0.78rem; color: #96D35F;
  background: transparent; border: 1px solid rgba(150,211,95,0.3);
  padding: 0.4rem 0.85rem; border-radius: 999px;
  cursor: pointer; text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
  font-family: inherit;
}
.pa-deliverable-link:hover, .pa-deliverable-set:hover {
  background: rgba(150,211,95,0.08);
  border-color: #96D35F;
}
.pa-deliverable-link:focus-visible, .pa-deliverable-set:focus-visible {
  outline: 2px solid #96D35F; outline-offset: 2px;
}
.pa-empty {
  background: rgba(255,255,255,0.02);
  border: 1px dashed rgba(154,166,189,0.25);
  border-radius: 14px; padding: 1.5rem;
  text-align: center; color: #9AA6BD;
}
.pa-empty h3 {
  margin: 0 0 0.5rem; color: #E8F5D9; font-size: 1rem;
}
.pa-empty p { margin: 0; font-size: 0.85rem; line-height: 1.5; }
@media (prefers-reduced-motion: reduce) {
  .pa-progress-fill { transition: none; }
  .pa-card { transition: none; }
}

/* ============================================
 * Section 49 — Top Scores leaderboard (item D follow-on, 2026-05-09)
 * ============================================ */
.cap-leaderboard {
  margin-top: 2rem;
}
.cap-leaderboard:empty { display: none; }
.cap-leaderboard-header { margin-bottom: 1rem; }
.cap-leaderboard-header h3 {
  margin: 0 0 0.25rem 0; font-size: 1.05rem; color: #E8F5D9; font-weight: 600;
}
.cap-leaderboard-sub {
  margin: 0; font-size: 0.85rem; color: #9AA6BD;
}
.cap-leaderboard-list {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.5rem;
  counter-reset: lb-rank;
}
.cap-leaderboard-row {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  align-items: center; gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(154,166,189,0.18);
  border-left: 3px solid var(--lb-accent, #96D35F);
  border-radius: 10px;
}
.cap-leaderboard-rank {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.25rem; color: var(--lb-accent, #96D35F);
  font-weight: 600; text-align: center;
}
.cap-leaderboard-info { min-width: 0; }
.cap-leaderboard-title {
  font-size: 0.95rem; color: #E8F5D9; font-weight: 500;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.cap-leaderboard-author {
  font-size: 0.75rem; color: #9AA6BD; margin-top: 0.15rem;
}
.cap-leaderboard-score {
  display: flex; flex-direction: column; align-items: flex-end;
  font-family: 'JetBrains Mono', monospace;
}
.cap-leaderboard-pct {
  font-size: 1.1rem; color: #E8F5D9; font-weight: 600;
}
.cap-leaderboard-num {
  font-size: 0.7rem; color: #5C6478; margin-top: 0.15rem;
}

/* ============================================
 * Section 50 — AI tutor health card (item E, 2026-05-09)
 * ============================================ */
.tutor-health-card {
  display: flex; align-items: center; gap: 0.75rem;
  padding: 0.75rem 1rem; border-radius: 10px;
  border: 1px solid rgba(154,166,189,0.2);
  background: rgba(255,255,255,0.02);
  font-size: 0.85rem;
}
.tutor-health-card[data-state="ok"] { border-color: rgba(150,211,95,0.4); background: rgba(150,211,95,0.05); }
.tutor-health-card[data-state="degraded"] { border-color: rgba(245,166,35,0.4); background: rgba(245,166,35,0.05); }
.tutor-health-card[data-state="unavailable"] { border-color: rgba(255,107,107,0.4); background: rgba(255,107,107,0.05); }
.tutor-health-dot {
  width: 10px; height: 10px; border-radius: 50%;
  flex-shrink: 0;
}
.tutor-health-card[data-state="ok"] .tutor-health-dot { background: #96D35F; box-shadow: 0 0 6px rgba(150,211,95,0.6); }
.tutor-health-card[data-state="degraded"] .tutor-health-dot { background: #F5A623; }
.tutor-health-card[data-state="unavailable"] .tutor-health-dot { background: #FF6B6B; }
.tutor-health-label {
  font-weight: 500;
}
.tutor-health-card[data-state="ok"] .tutor-health-label { color: #96D35F; }
.tutor-health-card[data-state="degraded"] .tutor-health-label { color: #F5A623; }
.tutor-health-card[data-state="unavailable"] .tutor-health-label { color: #FF6B6B; }
.tutor-health-msg {
  color: #9AA6BD; flex: 1;
}

/* ============================================
 * Section 51 — TTS read-aloud buttons (item 7, 2026-05-09)
 * ============================================ */
.tts-read-btn {
  background: transparent;
  border: 1px solid rgba(150,211,95,0.3);
  color: #96D35F;
  border-radius: 50%;
  width: 24px; height: 24px;
  font-size: 11px; line-height: 1;
  margin-left: 0.4em;
  cursor: pointer; padding: 0;
  vertical-align: middle;
  transition: background 0.15s ease, transform 0.15s ease;
}
.tts-read-btn:hover { background: rgba(150,211,95,0.15); transform: scale(1.1); }
.tts-read-btn:focus-visible { outline: 2px solid #96D35F; outline-offset: 2px; }

/* ============================================
 * Section 52 — Lab auto-grading verdict (item 1, 2026-05-09)
 * ============================================ */
.lg-verdict {
  border-radius: 10px;
  padding: 0.75rem 1rem;
  margin-top: 0.75rem;
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  font-size: 0.9rem;
}
.lg-pass { border-left: 4px solid #96D35F; }
.lg-fail { border-left: 4px solid #FF6B6B; }
.lg-info { border-left: 4px solid #22D3EE; }
.lg-pending {
  border-left: 4px solid #A78BFA;
  font-style: italic; color: #9AA6BD;
}
.lg-verdict-head {
  display: flex; align-items: baseline; gap: 0.75rem;
  margin-bottom: 0.4rem;
}
.lg-verdict-icon {
  font-size: 1.4rem; font-weight: 600;
}
.lg-pass .lg-verdict-icon { color: #96D35F; }
.lg-fail .lg-verdict-icon { color: #FF6B6B; }
.lg-verdict-score {
  font-family: 'JetBrains Mono', monospace;
  color: #E8F5D9; font-size: 1rem;
}
.lg-verdict-body {
  color: #C7D0E0; line-height: 1.5;
}

/* ============================================
 * Section 53 — Quiz performance trends (item 3, 2026-05-09)
 * ============================================ */
.qt-card {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.qt-card.qt-empty { color: #9AA6BD; font-style: italic; text-align: center; }
.qt-card h3 {
  margin: 0 0 0.75rem; color: #E8F5D9; font-size: 1rem; font-weight: 600;
}
.qt-row {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem; margin-bottom: 0.75rem;
}
.qt-stat {
  text-align: center;
  border-right: 1px solid rgba(154,166,189,0.1);
  padding-right: 0.75rem;
}
.qt-stat:last-child { border-right: none; }
.qt-pct {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.5rem; color: #E8F5D9;
}
.qt-lbl { font-size: 0.7rem; color: #9AA6BD; margin-top: 0.2rem; }
.qt-delta {
  font-size: 0.85rem;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(154,166,189,0.18);
  text-align: center;
}
.qt-up { color: #96D35F; }
.qt-down { color: #FF6B6B; }
.qt-flat { color: #9AA6BD; }

/* ============================================
 * Section 54 — Concept search palette (item 18, 2026-05-09)
 * ============================================ */
[data-concept-search-mount] {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.cs-form { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.cs-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; letter-spacing: 0.18em; color: #5C6478;
  text-transform: uppercase;
  width: 100%;
}
.cs-form input[type="search"] {
  flex: 1; min-width: 200px;
  background: rgba(0,0,0,0.2);
  border: 1px solid rgba(154,166,189,0.25);
  color: #E8F5D9;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.95rem;
  outline: none;
}
.cs-form input[type="search"]:focus { border-color: #96D35F; }
.cs-btn {
  background: #96D35F; color: #05060B;
  padding: 0.5rem 1rem; border-radius: 8px;
  border: none; cursor: pointer;
  font-weight: 600; font-size: 0.85rem;
}
.cs-btn:hover { background: #8BC450; }
.cs-results { margin-top: 0.75rem; }
.cs-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.cs-result {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(154,166,189,0.12);
  border-radius: 8px;
  padding: 0.75rem 0.9rem;
}
.cs-result a { text-decoration: none; color: inherit; }
.cs-result-title { display: block; color: #E8F5D9; font-weight: 500; }
.cs-result-course {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; letter-spacing: 0.12em; color: #5C6478;
  text-transform: uppercase; margin-left: 0.5em;
}
.cs-result-snippet {
  margin: 0.4rem 0 0; color: #9AA6BD; font-size: 0.85rem; line-height: 1.4;
}
.cs-pending, .cs-empty, .cs-error {
  color: #9AA6BD; font-style: italic; padding: 0.5rem 0;
}
.cs-error { color: #FF6B6B; }

/* ============================================
 * Section 55 — Tutor feedback bar (item 25, 2026-05-09)
 * ============================================ */
.tf-bar {
  display: flex; align-items: center; gap: 0.4rem;
  margin-top: 0.5rem; padding-top: 0.5rem;
  border-top: 1px dashed rgba(154,166,189,0.15);
  font-size: 0.85rem;
}
.tf-btn {
  background: transparent;
  border: 1px solid rgba(154,166,189,0.25);
  color: #9AA6BD;
  border-radius: 999px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.tf-btn:hover { color: #96D35F; border-color: #96D35F; }
.tf-btn:disabled { cursor: default; opacity: 0.55; }
.tf-btn.tf-active { background: rgba(150,211,95,0.15); color: #96D35F; border-color: #96D35F; }
.tf-status { color: #9AA6BD; font-size: 0.8rem; margin-left: 0.4em; }

/* ============================================
 * Section 56 — Lab portfolio page (item 4, 2026-05-09)
 * ============================================ */
.lp-header { margin-bottom: 1.5rem; }
.lp-header h1 { color: #E8F5D9; margin: 0 0 0.4rem; }
.lp-sub { color: #9AA6BD; max-width: 720px; line-height: 1.5; margin: 0; }
.lp-section-title {
  margin-top: 2rem; color: #E8F5D9; font-size: 1.15rem;
}
.lp-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem; margin: 1.5rem 0;
}
.lp-stat {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(154,166,189,0.18);
  border-radius: 10px; padding: 1rem;
  text-align: center;
}
.lp-stat-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem; color: #96D35F;
}
.lp-stat-lbl { font-size: 0.8rem; color: #9AA6BD; margin-top: 0.4rem; }
.lp-stat-loading { color: #9AA6BD; font-style: italic; padding: 1rem; }
.lp-grid {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.lp-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(154,166,189,0.18);
  border-left: 3px solid var(--lp-accent, #22D3EE);
  border-radius: 12px;
  padding: 1rem;
}
.lp-card-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 0.4rem;
}
.lp-card-icon { font-size: 1.1rem; }
.lp-card-date {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; color: #5C6478;
}
.lp-card-title {
  margin: 0 0 0.4rem; color: #E8F5D9; font-size: 0.95rem; font-weight: 500;
}
.lp-card-meta { font-size: 0.75rem; color: #9AA6BD; margin-bottom: 0.6rem; }
.lp-card-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem; color: #E8F5D9;
}
.lp-card-link {
  font-size: 0.8rem; color: #96D35F; text-decoration: none;
}
.lp-card-link:hover { text-decoration: underline; }
.lp-empty {
  grid-column: 1 / -1;
  color: #9AA6BD; font-style: italic; padding: 1.5rem; text-align: center;
}
.skip-link {
  position: absolute; top: -40px; left: 0;
  background: #96D35F; color: #05060B;
  padding: 0.5rem 1rem;
  border-radius: 0 0 8px 0;
  z-index: 1000;
  text-decoration: none;
}
.skip-link:focus { top: 0; }
.aisteam-page { background: #05060B; color: #C7D0E0; min-height: 100vh; }
.topnav {
  background: rgba(5,6,11,0.95); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(154,166,189,0.15);
  position: sticky; top: 0; z-index: 50;
}
.topnav__inner {
  display: flex; justify-content: space-between; align-items: center;
  max-width: 1200px; margin: 0 auto;
  padding: 0.75rem 1.5rem;
  gap: 1rem;
}
.topnav__brand { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; }
.topnav__brand-mark {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #96D35F, #22D3EE, #A78BFA);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.topnav__brand-text {
  font-family: 'JetBrains Mono', monospace; color: #E8F5D9;
  font-size: 0.85rem; letter-spacing: 0.08em;
}
.topnav__nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.topnav__nav a { color: #9AA6BD; text-decoration: none; font-size: 0.9rem; }
.topnav__nav a:hover { color: #96D35F; }
.topnav__active { color: #96D35F !important; font-weight: 600; }
.topnav__logout {
  background: transparent; border: 1px solid rgba(154,166,189,0.3);
  color: #9AA6BD; padding: 0.4rem 0.85rem; border-radius: 8px;
  font-size: 0.8rem; cursor: pointer;
}
.topnav__logout:hover { color: #FF6B6B; border-color: #FF6B6B; }

/* ============================================
 * Section 57 — 50-batch widgets (2026-05-09)
 * ============================================ */
.streak-chip {
  display: inline-flex; align-items: center; gap: 0.4em;
  background: linear-gradient(135deg, rgba(255,107,107,0.15), rgba(245,166,35,0.15));
  border: 1px solid rgba(255,107,107,0.4);
  border-radius: 999px;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem; color: #E8F5D9;
}
.streak-chip-empty {
  background: transparent; border-color: rgba(154,166,189,0.25); color: #9AA6BD;
}
.streak-chip strong { color: #F5A623; }

.ach-card, .ach-empty {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.ach-card h3, .ach-empty h3 { margin: 0 0 0.75rem; color: #E8F5D9; font-size: 1rem; }
.ach-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.ach-item {
  display: inline-flex; align-items: center; gap: 0.4em;
  background: rgba(150,211,95,0.08);
  border: 1px solid rgba(150,211,95,0.25);
  border-radius: 999px; padding: 0.35rem 0.7rem;
  font-size: 0.8rem; color: #C7D0E0;
}
.ach-icon { font-size: 1rem; }

.ln-form, .rc-form, .ft-card, .gdpr-card, .a11y-card, .ct-card, .cp-card {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.ln-form h3, .rc-form h3, .ft-card h3, .gdpr-card h3, .a11y-card h3, .ct-card h3, .cp-card h3 {
  margin: 0 0 0.75rem; color: #E8F5D9; font-size: 1rem;
}
.ln-form label, .rc-form label {
  display: block; margin-bottom: 0.75rem;
  font-size: 0.85rem; color: #9AA6BD;
}
.ln-form textarea, .rc-form textarea {
  width: 100%; margin-top: 0.3rem;
  background: rgba(0,0,0,0.2); border: 1px solid rgba(154,166,189,0.25);
  border-radius: 8px; padding: 0.5rem 0.75rem;
  color: #E8F5D9; font-family: inherit; font-size: 0.9rem;
  outline: none; resize: vertical;
}
.ln-form textarea:focus, .rc-form textarea:focus { border-color: #96D35F; }
.ln-submit, .rc-submit, .gdpr-btn, .ft-locate {
  background: #96D35F; color: #05060B; border: none;
  padding: 0.5rem 1rem; border-radius: 8px;
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
}
.ln-submit:hover, .rc-submit:hover, .gdpr-btn:hover, .ft-locate:hover { background: #8BC450; }
.ln-status, .rc-result, .gdpr-status, .ft-results {
  margin-top: 0.75rem; font-size: 0.85rem; color: #9AA6BD;
}
.ln-success, .gdpr-success { color: #96D35F; }
.ln-fail, .rc-fail, .gdpr-fail { color: #FF6B6B; }
.rc-verdict {
  border-left: 3px solid #22D3EE; padding-left: 0.75rem;
  margin-top: 0.5rem;
}
.rc-verdict.rc-high { border-color: #96D35F; }
.rc-verdict.rc-mid { border-color: #F5A623; }
.rc-verdict.rc-low { border-color: #FF6B6B; }
.rc-coverage { color: #E8F5D9; font-size: 0.95rem; margin-bottom: 0.5rem; }
.rc-suggestions { list-style: disc inside; padding-left: 0.5em; }
.rc-suggestions li { margin-bottom: 0.25rem; font-size: 0.85rem; }
.rc-miss { font-size: 0.8rem; color: #9AA6BD; }
.rc-miss code {
  background: rgba(255,255,255,0.05);
  padding: 0.1em 0.4em; border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.ct-list { list-style: none; margin: 0; padding: 0; counter-reset: ct; }
.ct-list li {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  align-items: center; gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px dashed rgba(154,166,189,0.1);
  font-size: 0.85rem;
}
.ct-rank { font-family: 'JetBrains Mono', monospace; color: #96D35F; }
.ct-name { color: #E8F5D9; }
.ct-xp { font-family: 'JetBrains Mono', monospace; color: #22D3EE; }
.ct-help { font-size: 0.75rem; color: #5C6478; margin-top: 0.5rem; font-style: italic; }

.cp-aim { color: #E8F5D9; margin-bottom: 0.5rem; }
.cp-instructions { padding-left: 1.2em; color: #C7D0E0; font-size: 0.9rem; }

.ft-list { list-style: none; margin: 0.5rem 0 0; padding: 0; }
.ft-list li {
  padding: 0.35rem 0;
  border-bottom: 1px dashed rgba(154,166,189,0.1);
  color: #C7D0E0; font-size: 0.85rem;
}
.ft-discipline {
  font-family: 'JetBrains Mono', monospace; font-size: 0.7rem;
  color: #5C6478; margin-left: 0.5em; text-transform: uppercase;
  letter-spacing: 0.12em;
}

.a11y-card label {
  display: flex; align-items: center; gap: 0.6em;
  margin: 0.4rem 0; color: #C7D0E0; font-size: 0.9rem;
  cursor: pointer;
}

.misconception-banner {
  background: linear-gradient(90deg, rgba(245,166,35,0.15), transparent);
  border-left: 4px solid #F5A623;
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  border-radius: 0 8px 8px 0;
  color: #C7D0E0;
}
.misconception-banner em { color: #E8F5D9; }
.mb-correction {
  display: block; margin-top: 0.4rem;
  color: #96D35F; font-size: 0.9rem;
}

/* Section 58 — Accessibility prefs (toggle classes) */
body.a11y-dyslexia {
  font-family: 'OpenDyslexic', 'Comic Sans MS', sans-serif !important;
  letter-spacing: 0.04em;
  word-spacing: 0.16em;
}
body.a11y-cognitive {
  line-height: 1.8;
  letter-spacing: 0.03em;
  font-size: 1.05rem;
}
body.a11y-cognitive p, body.a11y-cognitive li {
  max-width: 60ch !important;
}
body.a11y-colorblind {
  /* Replace red/green with blue/orange for protanopia/deuteranopia */
  --pa-accent: #0066CC;
  --pa-accent-success: #FF8800;
  --color-success: #FF8800;
  --color-danger: #0066CC;
}
body.a11y-print {
  background: #FFF !important;
  color: #000 !important;
}
body.a11y-print .topnav, body.a11y-print .ai-tutor-panel,
body.a11y-print .topnav__logout, body.a11y-print .ai-input-bar {
  display: none !important;
}
@media print {
  .topnav, .ai-tutor-panel, .topnav__logout, .ai-input-bar { display: none !important; }
  body { background: #FFF; color: #000; }
}

/* ============================================
 * Section 59 — v3 fresh-50 widget styling (2026-05-09)
 * ============================================ */
.ncam-card, .sketch-card, .ap-card, .cn-card, .fc-card, .mast-card,
.bud-card, .qa-card, .wn-card, .pex-card, .pc-card, .sg-form {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.ncam-card h3, .sketch-card h3, .ap-card h3, .cn-card h3, .fc-card h3,
.mast-card h3, .bud-card h3, .qa-card h3, .wn-card h3, .pex-card h3,
.pc-card h3, .sg-form h3 {
  margin: 0 0 0.75rem; color: #E8F5D9; font-size: 1rem; font-weight: 600;
}
.ncam-help, .sketch-help, .ap-help, .fc-help, .mast-help, .pex-card p,
.pc-help, .qa-empty, .qa-card p, .bud-card p, .wn-help { color: #9AA6BD; font-size: 0.85rem; }
.ncam-input, .ncam-submit, .sketch-clear, .sketch-submit, .ap-btn,
.cn-generate, .bud-request, .qa-form button, .pex-btn, .ap-send-tutor,
.cn-print, .sg-form button {
  background: #96D35F; color: #05060B; border: none;
  padding: 0.5rem 1rem; border-radius: 8px;
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
  margin-top: 0.5rem;
}
.ncam-input { background: rgba(0,0,0,0.2); color: #E8F5D9; border: 1px solid rgba(154,166,189,0.25); padding: 0.4rem; }
.ncam-preview img, .sketch-canvas { max-width: 100%; border-radius: 8px; }
.sketch-canvas { background: #FFF; border: 1px solid rgba(154,166,189,0.25); cursor: crosshair; }
.ncam-feedback, .sketch-feedback, .ap-result, .cn-result, .ap-pending,
.ap-fail, .ncam-fail, .sketch-fail, .cn-fail {
  margin-top: 0.75rem; color: #C7D0E0; font-size: 0.9rem;
}
.ncam-note { color: #5C6478; font-size: 0.75rem; font-style: italic; }

.cn-table {
  width: 100%; border-collapse: collapse; margin-top: 0.75rem; font-size: 0.85rem;
}
.cn-table th, .cn-table td {
  border: 1px solid rgba(154,166,189,0.2); padding: 0.5rem; vertical-align: top;
}
.cn-table th { background: rgba(154,166,189,0.05); color: #5C6478; }
.cn-cue { width: 30%; color: #96D35F; font-family: 'JetBrains Mono', monospace; font-size: 0.8rem; }
.cn-note { color: #C7D0E0; }
.cn-detailed p { margin: 0.5rem 0; color: #C7D0E0; line-height: 1.5; }
.cn-summary {
  margin-top: 0.75rem; padding: 0.75rem; border-radius: 8px;
  background: rgba(150,211,95,0.05); color: #E8F5D9; font-size: 0.9rem;
}

.fc-list, .qa-list, .wn-list, .pc-table tbody {
  list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 0.5rem;
}
.fc-item a, .qa-item, .wn-item {
  display: block; padding: 0.5rem 0.75rem;
  background: rgba(255,255,255,0.02);
  border-radius: 8px; text-decoration: none; color: inherit;
}
.fc-item a:hover, .wn-item:hover { background: rgba(255,255,255,0.04); }
.fc-title { color: #E8F5D9; }
.fc-stat { color: #F5A623; font-family: 'JetBrains Mono', monospace; font-size: 0.75rem; margin-left: 0.5em; }

.mast-bar {
  background: rgba(154,166,189,0.15);
  height: 12px; border-radius: 6px; overflow: hidden;
  margin-bottom: 0.5rem;
}
.mast-fill {
  height: 100%; background: linear-gradient(90deg, #96D35F, #22D3EE);
  transition: width 0.4s ease;
}
.mast-stat { color: #E8F5D9; font-size: 0.95rem; font-family: 'JetBrains Mono', monospace; }

.qa-item { display: block; padding: 0.5rem 0.75rem; }
.qa-title { color: #E8F5D9; font-weight: 500; margin-bottom: 0.25rem; }
.qa-body { color: #9AA6BD; font-size: 0.85rem; line-height: 1.4; }
.qa-form { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem; padding-top: 0.5rem; border-top: 1px dashed rgba(154,166,189,0.15); }
.qa-form input, .qa-form textarea, .sg-form input, .sg-form textarea {
  background: rgba(0,0,0,0.2); border: 1px solid rgba(154,166,189,0.25);
  border-radius: 8px; padding: 0.5rem 0.75rem;
  color: #E8F5D9; font-family: inherit; font-size: 0.9rem; outline: none;
}
.qa-form input:focus, .qa-form textarea:focus,
.sg-form input:focus, .sg-form textarea:focus { border-color: #96D35F; }

.wn-item { display: block; padding: 0.5rem 0.75rem; color: #C7D0E0; font-size: 0.9rem; }
.wn-kind {
  font-family: 'JetBrains Mono', monospace; font-size: 0.7rem;
  color: #5C6478; text-transform: uppercase; letter-spacing: 0.12em;
  margin-right: 0.5em;
}
.wn-list a { color: #96D35F; text-decoration: none; }
.wn-list a:hover { text-decoration: underline; }

.pc-table { width: 100%; border-collapse: collapse; margin-top: 0.75rem; font-size: 0.85rem; }
.pc-table th, .pc-table td { border: 1px solid rgba(154,166,189,0.2); padding: 0.4rem 0.6rem; }
.pc-table th { background: rgba(154,166,189,0.05); color: #5C6478; text-align: left; font-weight: 500; }
.pc-table code { font-family: 'JetBrains Mono', monospace; color: #22D3EE; font-size: 0.8rem; }
.pc-note { font-size: 0.75rem; color: #5C6478; margin-top: 0.5rem; font-style: italic; }

.sg-form label { display: block; margin-bottom: 0.6rem; color: #9AA6BD; font-size: 0.85rem; }
.sg-form input, .sg-form textarea { width: 100%; margin-top: 0.3rem; }
.sg-success, .pex-success { color: #96D35F; }
.sg-fail, .pex-fail { color: #FF6B6B; }

.pex-status { margin-top: 0.5rem; font-size: 0.85rem; }

.bud-success { color: #96D35F; font-size: 0.85rem; }
.bud-waiting { color: #F5A623; font-size: 0.85rem; }
.bud-fail { color: #FF6B6B; font-size: 0.85rem; }
.bud-status { margin-top: 0.5rem; }
.bud-empty .bud-request { display: inline-block; }
.bud-card code { font-family: 'JetBrains Mono', monospace; color: #22D3EE; }

.ap-prompt summary { cursor: pointer; color: #96D35F; font-size: 0.85rem; }
.ap-prompt pre {
  background: rgba(0,0,0,0.3); padding: 0.75rem; border-radius: 8px;
  white-space: pre-wrap; font-size: 0.8rem; color: #C7D0E0;
  font-family: 'JetBrains Mono', monospace; margin-top: 0.5rem;
}

/* ============================================
 * Section 60 — v4 pedagogy-deep widget styling (2026-05-09)
 * ============================================ */
.fe-card, .il-card, .pf-card, .ci-card, .dm-card, .rd-card, .pg-card,
.cv-card, .sj-card, .mh-card, .ac-card, .tt-card {
  border: 1px solid rgba(154,166,189,0.18);
  background: rgba(255,255,255,0.02);
  border-radius: 14px;
  padding: 1rem 1.1rem;
}
.fe-card h3, .il-card h3, .pf-card h3, .ci-card h3, .dm-card h3, .rd-card h3,
.pg-card h3, .cv-card h3, .sj-card h3, .mh-card h3, .ac-card h3, .tt-card h3 {
  margin: 0 0 0.75rem; color: #E8F5D9; font-size: 1rem; font-weight: 600;
}
.fe-help, .il-help, .ci-help, .cv-help, .ac-help, .tt-help {
  color: #9AA6BD; font-size: 0.85rem;
}
.rd-card { border-left: 4px solid #F5A623; background: rgba(245,166,35,0.05); }
.rd-card p { color: #C7D0E0; font-size: 0.9rem; line-height: 1.5; }

.fe-slider { width: 100%; margin: 0.5rem 0; }
.fe-load, .il-load, .pf-load, .ci-form button, .dm-form button,
.cv-form button, .sj-form button, .ac-form button, .tt-form button,
.pg-form button, .tt-send-tutor {
  background: #96D35F; color: #05060B; border: none;
  padding: 0.5rem 1rem; border-radius: 8px;
  cursor: pointer; font-size: 0.85rem; font-weight: 600;
  margin-top: 0.5rem;
}
.fe-steps { padding-left: 1.5em; color: #C7D0E0; font-size: 0.9rem; }
.fe-steps li { margin: 0.4rem 0; }
.fe-faded { opacity: 0.7; }
.fe-faded input {
  width: 100%; background: rgba(0,0,0,0.2);
  border: 1px solid rgba(154,166,189,0.25);
  border-radius: 6px; padding: 0.4rem 0.75rem;
  color: #E8F5D9; font-family: inherit; font-size: 0.85rem;
  margin-top: 0.25rem;
}

.il-list { list-style: decimal inside; padding: 0; }
.il-q { padding: 0.5rem 0; border-bottom: 1px dashed rgba(154,166,189,0.15); }
.il-from { font-size: 0.7rem; color: #5C6478; font-family: 'JetBrains Mono', monospace; text-transform: uppercase; letter-spacing: 0.12em; }
.il-stem { color: #E8F5D9; font-size: 0.9rem; margin-top: 0.3rem; }

.pf-prompt, .dm-prompt, .tt-prompt {
  background: rgba(0,0,0,0.3); padding: 0.75rem;
  border-radius: 8px; white-space: pre-wrap;
  font-size: 0.85rem; color: #C7D0E0;
  font-family: 'JetBrains Mono', monospace;
  margin-top: 0.5rem; max-height: 300px; overflow-y: auto;
}

.ci-form, .dm-form, .pg-form, .cv-form, .sj-form, .ac-form, .tt-form {
  display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem;
}
.ci-form input, .dm-form textarea, .pg-form input, .cv-form input,
.sj-form input, .sj-form textarea, .ac-form select, .ac-form textarea,
.tt-form input {
  background: rgba(0,0,0,0.2);
  border: 1px solid rgba(154,166,189,0.25);
  border-radius: 8px; padding: 0.5rem 0.75rem;
  color: #E8F5D9; font-family: inherit; font-size: 0.9rem; outline: none;
}
.ci-form input:focus, .dm-form textarea:focus, .pg-form input:focus,
.cv-form input:focus, .sj-form input:focus, .sj-form textarea:focus,
.ac-form select:focus, .ac-form textarea:focus, .tt-form input:focus {
  border-color: #96D35F;
}
.sj-form label, .ac-form select { color: #C7D0E0; font-size: 0.85rem; }

.cv-list, .sj-entries { margin-top: 0.75rem; padding: 0; list-style: none; }
.cv-list li {
  padding: 0.4rem 0.75rem; background: rgba(255,255,255,0.02);
  border-radius: 6px; color: #C7D0E0; font-size: 0.85rem; margin-bottom: 0.3rem;
}
.sj-entry { padding: 0.5rem 0.75rem; background: rgba(255,255,255,0.02); border-radius: 8px; margin-bottom: 0.4rem; }
.sj-entry h4 { margin: 0 0 0.25rem; color: #E8F5D9; font-size: 0.9rem; }
.sj-entry p { color: #9AA6BD; font-size: 0.8rem; line-height: 1.4; margin: 0; }

.mh-card { border-left: 4px solid #22D3EE; background: rgba(34,211,238,0.04); }
.mh-msg { color: #E8F5D9; font-weight: 500; margin-bottom: 0.5rem; }
.mh-list { list-style: none; padding: 0; margin: 0; }
.mh-list li { padding: 0.4rem 0; color: #C7D0E0; font-size: 0.9rem; border-bottom: 1px dashed rgba(154,166,189,0.12); }
.mh-list a { color: #96D35F; text-decoration: none; }
.mh-list a:hover { text-decoration: underline; }

.ac-card { border-left: 4px solid #FF6B6B; }
.ac-status { margin-top: 0.5rem; font-size: 0.85rem; }
.ac-ok { color: #96D35F; }
.ac-fail { color: #FF6B6B; }

.tt-ack { color: #96D35F; font-size: 0.9rem; margin: 0.5rem 0; }

.crisis-banner {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,107,107,0.95);
  color: white; padding: 1rem 1.5rem;
  text-align: center; z-index: 9999;
  font-size: 0.95rem;
  border-bottom: 2px solid rgba(255,255,255,0.4);
  backdrop-filter: blur(8px);
}

/* ============================================================================
 * Section 61 — AI STEAM Plus v5 (a11y / collab / assessment-depth) (2026-05-09)
 * ============================================================================ */

/* A11y palette overrides via [data-a11y-palette] on <html> */
html[data-a11y-palette="protanopia"] {
  --accent-cyan: #4DA8DA;
  --accent-yellow: #FFD93D;
  --accent-magenta: #B27DA8;
}
html[data-a11y-palette="deuteranopia"] {
  --accent-cyan: #3FB1E0;
  --accent-yellow: #FFC02E;
  --accent-magenta: #C7689E;
}
html[data-a11y-palette="tritanopia"] {
  --accent-cyan: #5FAFC9;
  --accent-yellow: #FFB55F;
  --accent-magenta: #FF6B7A;
}
html[data-a11y-palette="high_contrast"] {
  --bg-card: #000000;
  --text-primary: #FFFFFF;
  --text-muted: #E5E5E5;
}
html[data-a11y-palette="high_contrast"] body {
  background: #000;
  color: #fff;
}
html[data-a11y-palette="high_contrast"] .v5-card,
html[data-a11y-palette="high_contrast"] .card {
  border: 2px solid #FFFFFF !important;
  background: #000000 !important;
  color: #FFFFFF !important;
}

html[data-a11y-font="dyslexia_friendly"] body,
html[data-a11y-font="dyslexia_friendly"] * {
  font-family: "OpenDyslexic", "Comic Sans MS", "Trebuchet MS", system-ui, sans-serif !important;
  letter-spacing: 0.04em;
}
html[data-a11y-font="larger"] body {
  font-size: 1.125rem;
  line-height: var(--a11y-line-height, 1.65);
}
html[data-a11y-motion="reduced"] *,
html[data-a11y-motion="reduced"] *::before,
html[data-a11y-motion="reduced"] *::after {
  animation-duration: 0s !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0s !important;
  scroll-behavior: auto !important;
}
html[data-a11y-focus="visible"] :focus,
html[data-a11y-focus="visible"] :focus-visible {
  outline: 3px solid #00D4FF !important;
  outline-offset: 2px !important;
}

/* v5 card baseline */
.v5-card {
  background: #11141B;
  border: 1px solid rgba(154, 166, 189, 0.18);
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  margin: 1rem 0;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  color: #C7D0E0;
}
.v5-card-title {
  font-family: 'Space Grotesk', 'Inter', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0 0 0.35rem 0;
  color: #E8F5D9;
  letter-spacing: 0.01em;
}
.v5-card-sub {
  margin: 0 0 0.9rem 0;
  font-size: 0.88rem;
  color: #9AA6BD;
}

.v5-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: 0.5rem 0;
}
.v5-row-label {
  flex: 0 0 11rem;
  font-size: 0.88rem;
  color: #9AA6BD;
}
.v5-input,
select.v5-input,
input.v5-input {
  flex: 1 1 14rem;
  background: #0A0E15;
  color: #C7D0E0;
  border: 1px solid rgba(154, 166, 189, 0.25);
  border-radius: 8px;
  padding: 0.55rem 0.8rem;
  font-size: 0.9rem;
}
.v5-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #C7D0E0;
}
.v5-actions {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.8rem;
}
.v5-btn {
  background: linear-gradient(180deg, #96D35F, #6FB247);
  color: #0A1220;
  font-weight: 700;
  border: 0;
  border-radius: 8px;
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  font-size: 0.9rem;
}
.v5-btn:hover { filter: brightness(1.08); }
.v5-btn-secondary {
  background: #1B2030;
  color: #E8F5D9;
  border: 1px solid rgba(150, 211, 95, 0.3);
  border-radius: 8px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
  font-size: 0.88rem;
}
.v5-btn-secondary:hover { background: #232A3D; }
.v5-btn-small { padding: 0.25rem 0.5rem; font-size: 0.8rem; }
.v5-status { font-size: 0.85rem; color: #96D35F; }
.v5-tag {
  display: inline-block;
  padding: 0.15rem 0.55rem;
  background: rgba(150, 211, 95, 0.12);
  border: 1px solid rgba(150, 211, 95, 0.3);
  color: #96D35F;
  border-radius: 12px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-right: 0.4rem;
  letter-spacing: 0.01em;
}

.v5-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-top: 0.6rem;
}
.v5-mini-card {
  background: #0A0E15;
  border: 1px solid rgba(154, 166, 189, 0.18);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}
.v5-mini-title {
  font-weight: 700;
  color: #E8F5D9;
  margin-bottom: 0.4rem;
  font-size: 0.95rem;
}
.v5-mini-row {
  font-size: 0.82rem;
  color: #C7D0E0;
  margin: 0.15rem 0;
}
.v5-mini-skills {
  font-size: 0.78rem;
  color: #9AA6BD;
  margin-top: 0.4rem;
  line-height: 1.4;
}
.v5-list {
  list-style: none;
  padding: 0;
  margin: 0.6rem 0 0 0;
}
.v5-list-item {
  padding: 0.55rem 0;
  border-bottom: 1px dashed rgba(154, 166, 189, 0.12);
  font-size: 0.88rem;
  color: #C7D0E0;
}
.v5-link {
  color: #96D35F;
  text-decoration: none;
  font-weight: 600;
}
.v5-link:hover { text-decoration: underline; }

.v5-poll-area { margin-top: 0.8rem; }
.v5-poll-q {
  font-size: 1rem;
  font-weight: 700;
  color: #E8F5D9;
  margin-bottom: 0.6rem;
}
.v5-poll-opts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}
.v5-poll-tally {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.v5-poll-bar { display: flex; flex-direction: column; gap: 0.25rem; }
.v5-poll-bar-label {
  font-size: 0.82rem;
  color: #C7D0E0;
}
.v5-poll-bar-track {
  background: #0A0E15;
  border: 1px solid rgba(154, 166, 189, 0.2);
  border-radius: 6px;
  height: 12px;
  overflow: hidden;
}
.v5-poll-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #96D35F, #4DA8DA);
  transition: width 300ms ease-out;
}

.v5-quiz-q {
  margin: 0.65rem 0;
  padding: 0.6rem 0.8rem;
  background: #0A0E15;
  border: 1px solid rgba(154, 166, 189, 0.15);
  border-radius: 8px;
}
.v5-quiz-prompt {
  font-weight: 600;
  color: #E8F5D9;
  margin-bottom: 0.4rem;
}
.v5-quiz-opt {
  display: block;
  padding: 0.25rem 0;
  font-size: 0.88rem;
  color: #C7D0E0;
}

.v5-pre {
  background: #0A0E15;
  color: #E8F5D9;
  padding: 0.9rem 1.1rem;
  border-radius: 8px;
  border: 1px solid rgba(154, 166, 189, 0.18);
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 0.78rem;
  white-space: pre-wrap;
  max-height: 360px;
  overflow: auto;
  margin-top: 0.6rem;
}

@media (max-width: 720px) {
  .v5-row-label { flex-basis: 100%; }
  .v5-grid { grid-template-columns: 1fr; }
}