/* ============================================================
   E-Learning Module — Modern Light Redesign
   Audience: Vietnamese teachers (formal). Clean, calm, modern.
   One brand blue + neutrals; green/red reserved for semantics.
   ============================================================ */

/* MuseoRMITVN — RMIT brand heading font (all weights) */
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-300.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-500.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'MuseoRMITVN';
  src: url('Font/MuseoRMITVN-700.otf') format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Design Tokens ---------- */
:root {
  /* — RMIT Brand Colours — */
  --rmit-blue: #000054;      /* RMIT Blue — primary */
  --rmit-red:  #E61E2A;      /* RMIT Red  — accent  */

  /* Neutrals */
  --bg:       #ffffff;
  --bg-soft:  #F4F4F9;       /* blue-tinted off-white */
  --bg-softer:#FAFAFC;
  --panel:    #ffffff;

  /* Ink / text */
  --ink:   #000000;          /* Ink — black */
  --ink-2: #000000;          /* body text — black */
  --ink-3: #7A7A95;          /* muted labels */

  /* Lines */
  --line:   #E5E5EF;
  --line-2: #D0D0DF;

  /* Brand (RMIT Blue) — buttons, active states, interactive */
  --brand:       #000054;
  --brand-hover: #00003A;
  --brand-ink:   #000054;
  --brand-tint:  #EBEBF5;
  --brand-tint-2:#D6D6EC;

  /* Accent (RMIT Red) — progress, brand mark, eyebrow, incorrect */
  --accent:       #E61E2A;
  --accent-hover: #C4191F;
  --accent-tint:  #FDECED;

  /* Semantic — always differentiated from brand/accent */
  --ok:      #1A7D4F;
  --ok-tint: #E7F3EC;
  --err:     #E61E2A;        /* = RMIT Red */
  --err-tint:#FDECED;

  /* Effects */
  --ring:      0 0 0 4px rgba(0, 0, 84, 0.14);
  --shadow-sm: 0 1px 2px rgba(0, 0, 40, 0.07);
  --shadow-md: 0 8px 24px rgba(0, 0, 40, 0.08);
  --shadow-lg: 0 24px 60px rgba(0, 0, 40, 0.16);

  /* Radius */
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 18px;

  --transition-speed: 0.42s;
  --transition-cubic: cubic-bezier(0.22, 1, 0.36, 1);
  --sidebar-width: 344px;

  /* ----- Legacy variable aliases ----- */
  --bg-primary:    var(--bg);
  --bg-secondary:  var(--bg-soft);
  --bg-tertiary:   #EAEAF2;
  --text-primary:  var(--ink);
  --text-secondary:var(--ink-2);
  --border-color:  var(--line);
  --accent-navy:   var(--ink);
  --accent-teal:   var(--brand);
  --accent-teal-hover: var(--brand-hover);
  --accent-emerald:var(--ok);
  --accent-purple: var(--brand);
  --glass-bg:      #ffffff;
  --glass-border:  var(--line);
  --card-shadow:   var(--shadow-md);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'MuseoRMITVN', 'Quicksand', Georgia, serif;
  font-weight: 500;
  letter-spacing: -0.011em;
  color: var(--ink);
  text-wrap: balance;
}

strong { font-weight: 600; color: var(--ink); }
a { color: var(--brand); }

::selection { background: var(--brand-tint-2); }

/* ---------- App Layout ---------- */
.app-container { display: flex; width: 100vw; height: 100vh; overflow: hidden; }
.main-workspace { display: flex; flex: 1; width: 100%; height: 100%; overflow: hidden; }

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-softer);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  flex-shrink: 0;
}

/* Header (replaces the old dark banner) */
.sidebar-top-banner {
  position: relative;
  padding: 1.75rem 1.5rem 1.5rem;
  background: var(--bg-softer);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  display: block;
  height: auto;
}
.banner-overlay { display: none; }
.banner-content { position: static; }

.brand-logo-container {
  width: 100%;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: inherit;
  text-decoration: none;
  border-radius: 8px;
}
.brand-logo-container:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
.brand-logo {
  height: auto;
  max-height: 40px;
  object-fit: contain;
}
.logo-moet {
  max-width: 56%;
}
.logo-rmit {
  max-width: 38%;
}
.brand-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
}
.brand-dot {
  width: 26px; height: 26px; flex-shrink: 0;
  border-radius: 7px;
  background: var(--rmit-red);
  position: relative;
  box-shadow: var(--shadow-sm);
}
.brand-dot::after {
  content: "";
  position: absolute; inset: 7px;
  border: 2px solid #fff;
  border-radius: 3px;
  border-right-color: transparent;
  border-bottom-color: transparent;
}
.brand-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  line-height: 1.3;
}

.sidebar-top-banner h1,
.sidebar-title {
  font-size: 1.06rem;
  font-weight: 500;
  line-height: 1.32;
  margin-bottom: 1.35rem;
  color: var(--ink);
  letter-spacing: -0.008em;
}

.progress-block { display: block; }
.progress-percent,
#progress-percent-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
  color: var(--brand);
  display: block;
}
.progress-bar-total {
  height: 7px;
  background-color: var(--line-2);
  border-radius: 99px;
  overflow: hidden;
}
.progress-bar-fill-total {
  height: 100%;
  background: var(--rmit-red);
  border-radius: 99px;
  transition: width 0.5s var(--transition-cubic);
}

/* Navigation */
.sidebar-nav { flex: 1; overflow-y: auto; padding: 1rem 0.85rem; }
.sidebar-nav ul { list-style: none; display: flex; flex-direction: column; gap: 0.2rem; }

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.8rem 0.85rem;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease;
  border-radius: var(--border-radius-md);
  background: transparent;
  color: var(--ink-2);
  font-size: 0.9rem;
  font-weight: 600;
  position: relative;
  border: 0;
}
.nav-item:hover { background-color: var(--bg-soft); color: var(--ink); }

.nav-item.active {
  background-color: var(--brand-tint);
  color: var(--brand-ink);
  font-weight: 700;
}
.nav-item.active::before {
  content: "";
  position: absolute;
  left: -0.85rem; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 22px;
  background: var(--brand);
  border-radius: 0 3px 3px 0;
}
.nav-title { flex: 1; line-height: 1.35; }

.nav-chevron {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--ink-3);
  transition: transform 0.2s ease, color 0.2s ease;
}
.nav-chevron svg { width: 16px; height: 16px; }
.nav-item[aria-expanded="true"] .nav-chevron {
  color: var(--brand);
  transform: rotate(180deg);
}

.nav-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 1.5px solid var(--line-2);
  background: var(--bg);
  transition: all 0.2s;
  flex-shrink: 0;
  font-size: 0.7rem;
  color: var(--ink-3);
}
.nav-item.active .nav-check { border-color: var(--brand-tint-2); }
.nav-item.completed .nav-check {
  background-color: var(--ok);
  border-color: var(--ok);
  color: white;
}

.nav-item.locked {
  opacity: 0.42;
  cursor: not-allowed;
}
.nav-item.locked:hover {
  background: transparent;
  color: var(--ink-2);
}
.nav-item.locked .nav-chevron { color: var(--ink-3); }

.nav-subsection.locked {
  opacity: 0.38;
  cursor: not-allowed;
  pointer-events: none;
}

.nav-subsections {
  padding: 0.15rem 0 0.35rem 1rem;
  gap: 0.1rem !important;
}
.nav-subsections[hidden] { display: none; }

.nav-subsection-item { display: block; }

.nav-subsection {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.58rem 0.7rem 0.58rem 0.85rem;
  border: 0;
  border-left: 2px solid var(--line);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  background: transparent;
  color: var(--ink-3);
  font-family: inherit;
  font-size: 0.79rem;
  font-weight: 500;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}
.nav-subsection:hover {
  background: var(--bg-soft);
  color: var(--ink);
}
.nav-subsection.active {
  background: var(--brand-tint);
  border-left-color: var(--brand);
  color: var(--brand-ink);
  font-weight: 700;
}

.nav-subsection-title { flex: 1; }

.nav-subcheck {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1.5px solid var(--line-2);
  border-radius: 50%;
  background: var(--bg);
  color: white;
  font-size: 0.62rem;
  transition: all 0.2s ease;
}
.nav-subsection.active .nav-subcheck { border-color: var(--brand-tint-2); }
.nav-subsection.completed .nav-subcheck {
  background: var(--ok);
  border-color: var(--ok);
}

/* Sidebar footer */
.sidebar-footer {
  padding: 0.9rem 1rem;
  border-top: 1px solid var(--line);
  background-color: var(--bg-softer);
  display: none;
  gap: 0.5rem;
  align-items: center;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.62rem 1.15rem;
  font-family: inherit;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.18s var(--transition-cubic);
  font-size: 0.88rem;
  letter-spacing: -0.005em;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }

.btn-primary {
  background-color: var(--brand);
  color: white;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) { background-color: var(--brand-hover); transform: translateY(-1px); }

.btn-secondary {
  background-color: var(--bg);
  color: var(--ink);
  border-color: var(--line-2);
}
.btn-secondary:hover:not(:disabled) { background-color: var(--bg-soft); border-color: var(--ink-3); }

.btn-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  padding: 0;
  background-color: var(--bg);
  color: var(--ink);
  border: 1px solid var(--line-2);
  flex-shrink: 0;
}
.btn-icon:hover { background-color: var(--bg-soft); }

.icon { width: 18px; height: 18px; }

/* ============================================================
   CONTENT AREA
   ============================================================ */
.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg);
  height: 100%;
  overflow: hidden;
}

.slide-viewport-wrapper { flex: 1; position: relative; overflow: hidden; width: 100%; }

.glass-card {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  padding: 3rem 3.5rem 2rem;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform var(--transition-speed) var(--transition-cubic),
              opacity var(--transition-speed) ease;
  opacity: 1;
  transform: translateX(0);
}

.slide-out-left  { transform: translateX(-28px); opacity: 0; }
.slide-out-right { transform: translateX(28px);  opacity: 0; }
.slide-in-right  { transform: translateX(28px);  opacity: 0; }
.slide-in-left   { transform: translateX(-28px); opacity: 0; }

/* Slide content column */
.slide-content { width: 100%; max-width: 920px; margin: 0 auto; }

.slide-header { margin-bottom: 1.75rem; text-align: left; }

.slide-eyebrow,
.slide-subtitle {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--rmit-red);
  margin-bottom: 0.7rem;
}
.slide-title-underline { display: none; }

.slide-title {
  font-family: 'MuseoRMITVN', 'Be Vietnam Pro', Georgia, serif;
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--rmit-blue);
  margin-bottom: 0;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.slide-body {
  font-size: 1.02rem;
  line-height: 1.68;
  color: var(--ink-2);
  width: 100%;
}
.slide-body p { margin-bottom: 0.9rem; }
.slide-body p:last-child { margin-bottom: 0; }

/* Cover image */
.slide-cover-image {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--border-radius-lg);
  margin-top: 0.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
}

/* Image placeholder (when real image not present) */
.img-ph {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  min-height: 220px;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--line-2);
  background-color: var(--bg-soft);
  background-image: repeating-linear-gradient(
    -45deg, transparent 0 11px, rgba(36, 85, 201, 0.04) 11px 22px);
  color: var(--ink-3);
  padding: 1.5rem;
  text-align: center;
}
.img-ph-cover { min-height: 260px; max-width: 100%; margin-top: 0.5rem; }
.img-ph-tag {
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--brand);
  background: var(--brand-tint); padding: 0.3rem 0.7rem; border-radius: 99px;
}
.img-ph-name {
  font-family: 'SFMono-Regular', ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.78rem; color: var(--ink-3);
}

/* ---------- Grid & list helpers ---------- */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 0.5rem;
  align-items: start;
}

.bullet-list { list-style: none; margin-top: 0.75rem; }
.bullet-list li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: 0.65rem;
  line-height: 1.6;
}
.bullet-list li::before {
  content: "";
  position: absolute;
  left: 0.1rem; top: 0.62rem;
  width: 6px; height: 6px;
  border-radius: 50%;
  background-color: var(--brand);
}

/* ---------- Info cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.1rem;
  margin-top: 1rem;
}

.info-card {
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  padding: 1.6rem;
  transition: transform 0.2s var(--transition-cubic), box-shadow 0.2s, border-color 0.2s;
  box-shadow: var(--shadow-sm);
}
.info-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-2);
  box-shadow: var(--shadow-md);
}

.info-card-icon {
  width: 42px; height: 42px;
  background-color: var(--brand-tint);
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 1.1rem;
}
.info-card h4 { font-size: 1.06rem; font-weight: 500; margin-bottom: 0.45rem; color: var(--ink); }
.info-card p  { font-size: 0.92rem; color: var(--ink-2); line-height: 1.6; }

/* ============================================================
   ACCORDION
   ============================================================ */
.accordion-container {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-top: 1.25rem;
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}
.accordion-item { border-bottom: 1px solid var(--line); background-color: var(--panel); }
.accordion-item:last-child { border-bottom: none; }

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.15rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.18s;
}
.accordion-header:hover { background-color: var(--bg-soft); }
.accordion-item.active .accordion-header { color: var(--brand-ink); }

.accordion-icon {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--ink-3);
  transition: transform 0.25s var(--transition-cubic);
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 7px;
  background: var(--bg-soft);
  flex-shrink: 0;
}
.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
  background: var(--brand-tint);
  color: var(--brand);
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--ink-2);
  font-size: 0.95rem;
  line-height: 1.65;
}
.accordion-item.active .accordion-body { padding: 0 1.5rem 1.25rem; }

/* ============================================================
   SORTING GAME
   ============================================================ */
.game-container { display: flex; flex-direction: column; gap: 1.4rem; margin-top: 1rem; }
.game-instruction {
  font-size: 0.92rem;
  color: var(--ink-2);
  background: var(--brand-tint);
  border: 1px solid var(--brand-tint-2);
  padding: 0.8rem 1rem;
  border-radius: var(--border-radius-md);
  font-style: normal;
}
.game-arena { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; min-height: 180px; }

.card-deck {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  justify-content: center;
  align-items: center;
  background-color: var(--bg-soft);
  border: 1.5px dashed var(--line-2);
  border-radius: var(--border-radius-lg);
  padding: 1.25rem;
  min-height: 80px;
}

.drag-card {
  background-color: var(--panel);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: 0.6rem 1.1rem;
  cursor: grab;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  user-select: none;
  transition: all 0.18s;
}
.drag-card:hover { border-color: var(--brand); color: var(--brand-ink); }
.drag-card:active { cursor: grabbing; }
.drag-card.dragging { opacity: 0.4; }
.drag-card.selected-device {
  outline: none;
  border-color: var(--brand);
  box-shadow: var(--ring);
}

.drop-zone {
  display: flex;
  flex-direction: column;
  background-color: var(--bg-softer);
  border: 1.5px solid var(--line);
  border-radius: var(--border-radius-lg);
  padding: 1.1rem;
  transition: all 0.18s;
}
.drop-zone.dragover { border-color: var(--brand); background-color: var(--brand-tint); }
.drop-zone h4 {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.85rem;
  color: var(--brand);
}
.drop-zone-items { width: 100%; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }

.placed-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 0.6rem 0.85rem;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--ink);
}
.placed-card.correct   { border-color: var(--ok);  background-color: var(--ok-tint); }
.placed-card.incorrect { border-color: var(--err); background-color: var(--err-tint); }
.placed-card-feedback { font-weight: 700; }
.placed-card-feedback.correct   { color: var(--ok); }
.placed-card-feedback.incorrect { color: var(--err); }

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

/* ============================================================
   PROMPT COMPARISON (re-uses equality/equity classes)
   ============================================================ */
.equality-equity-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  margin-top: 1rem;
}
.ee-card {
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  box-shadow: var(--shadow-sm);
}
.ee-header { display: flex; align-items: center; gap: 0.75rem; }
.ee-badge {
  padding: 0.3rem 0.6rem;
  border-radius: 7px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.ee-badge.equality { background-color: var(--err-tint); color: var(--err); }
.ee-badge.equity   { background-color: var(--ok-tint);  color: var(--ok); }
.ee-header h4 { font-size: 0.95rem; font-weight: 700; color: var(--ink); }

/* (equality/equity illustration — kept for completeness, unused) */
.ee-illustration {
  height: 120px; display: flex; justify-content: space-around; align-items: flex-end;
  border-bottom: 2px solid var(--ink-3); padding-bottom: 8px; position: relative;
}
.ee-observer { width: 28px; background: var(--brand); border-radius: 4px 4px 0 0; }
.ee-box { width: 36px; border: 2px solid var(--brand); background: var(--bg-soft); border-radius: 4px; }

/* ============================================================
   QUIZ
   ============================================================ */
.quiz-container { margin-top: 0.5rem; width: 100%; }
.quiz-q-header {
  font-size: 0.74rem; font-weight: 700; color: var(--rmit-red);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.2rem;
}
.quiz-q-index {
  font-size: 1.1rem; font-weight: 700; color: var(--ink-3);
  margin-bottom: 1rem; font-family: 'Quicksand', sans-serif;
}
.quiz-q-index b { color: var(--ink); }
.quiz-divider { display: none; }

.quiz-card { display: flex; flex-direction: column; gap: 1.6rem; }
.quiz-question { font-size: 1.3rem; font-weight: 700; color: var(--ink); line-height: 1.4; letter-spacing: -0.01em; }

.quiz-options { display: flex; flex-direction: column; gap: 0.7rem; }

/* Full clickable option cards */
.quiz-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  user-select: none;
  padding: 1rem 1.15rem;
  border: 1.5px solid var(--line-2);
  border-radius: var(--border-radius-md);
  background: var(--panel);
  transition: all 0.16s var(--transition-cubic);
}
.quiz-option:hover { border-color: var(--brand); background: var(--brand-tint); }

.quiz-option-checkbox {
  width: 22px; height: 22px;
  border: 2px solid var(--line-2);
  border-radius: 6px;
  display: inline-block;
  flex-shrink: 0;
  position: relative;
  transition: all 0.16s;
  background-color: var(--bg);
}
.quiz-options.single .quiz-option-checkbox { border-radius: 50%; }

.quiz-option.selected { border-color: var(--brand); background: var(--brand-tint); }
.quiz-option.selected .quiz-option-checkbox { background-color: var(--brand); border-color: var(--brand); }
.quiz-option.selected .quiz-option-checkbox::after {
  content: "";
  position: absolute;
  left: 7px; top: 3px;
  width: 5px; height: 10px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.quiz-options.single .quiz-option.selected .quiz-option-checkbox::after {
  left: 6px; top: 6px; width: 7px; height: 7px;
  border: none; border-radius: 50%; background: #fff; transform: none;
}

.quiz-option-text { font-size: 0.98rem; font-weight: 500; color: var(--ink); line-height: 1.45; }
.quiz-option.selected .quiz-option-text { color: var(--brand-ink); font-weight: 600; }

.quiz-submit-area { display: flex; justify-content: flex-start; margin-top: 0.5rem; }

.btn-pill-submit {
  background-color: var(--brand);
  color: white;
  border-radius: 10px;
  padding: 0.8rem 2.5rem;
  border: none;
  font-size: 0.82rem;
  font-weight: 700;
  font-family: inherit;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all 0.18s var(--transition-cubic);
  box-shadow: var(--shadow-sm);
}
.btn-pill-submit:hover:not(:disabled) { background-color: var(--brand-hover); transform: translateY(-1px); }
.btn-pill-submit:disabled { opacity: 0.45; cursor: not-allowed; }

/* ============================================================
   FEEDBACK MODAL
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background-color: rgba(16, 30, 54, 0.42);
  backdrop-filter: blur(3px);
  z-index: 200;
  display: flex; justify-content: center; align-items: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }

.feedback-modal {
  width: 520px; max-width: 90%;
  background-color: var(--panel);
  border-radius: var(--border-radius-lg);
  padding: 2.5rem;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--line);
  animation: modalPop 0.34s var(--transition-cubic);
}
@keyframes modalPop {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.feedback-modal-icon-container {
  width: 64px; height: 64px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.1rem;
  color: #fff;
}
.feedback-modal-icon-container.correct   { background-color: var(--ok); }
.feedback-modal-icon-container.incorrect { background-color: var(--err); }

.feedback-modal-status {
  font-family: 'Quicksand', sans-serif;
  font-size: 1.3rem; font-weight: 700; color: var(--ink);
  margin-bottom: 0.9rem; letter-spacing: -0.01em;
}
.feedback-modal-body { font-size: 0.98rem; color: var(--ink-2); line-height: 1.65; margin-bottom: 1.5rem; }
.feedback-modal-footer {
  font-size: 0.86rem; font-style: normal; color: var(--ink-3);
  margin-bottom: 1.5rem; border-top: 1px solid var(--line); padding-top: 1.1rem; width: 100%;
}
.feedback-modal .btn { padding: 0.7rem 2.2rem; }

/* ============================================================
   SLIDE FOOTER / NAV
   ============================================================ */
.slide-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 3.5rem;
  border-top: 1px solid var(--line);
  flex-shrink: 0;
  background: var(--bg-softer);
}
.step-indicator { display: flex; gap: 0.4rem; }
.step-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background-color: var(--line-2);
  cursor: pointer;
  transition: all 0.22s var(--transition-cubic);
}
.step-dot:hover { background-color: var(--ink-3); }
/* Step dots */
.step-dot.active { background-color: var(--rmit-blue); width: 22px; border-radius: 4px; }
.step-dot.completed { background-color: var(--brand-tint-2); }
.step-dot.completed.active { background-color: var(--brand); }

/* ============================================================
   SUMMARY SCORE
   ============================================================ */
.quiz-score-banner {
  display: flex; flex-direction: column; align-items: center;
  text-align: center; padding: 1.5rem 1rem; margin-top: 1rem;
}
.quiz-score-circle {
  width: 220px; height: 220px;
  border-radius: 50%;
  background: var(--brand-tint);
  border: 1px solid var(--brand-tint-2);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 0.4rem;
  box-shadow: var(--shadow-md);
}
.quiz-score-num { font-size: 3.6rem; font-weight: 800; color: var(--brand); letter-spacing: -0.03em; line-height: 1; }
.quiz-score-label {
  font-size: 0.8rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--ink-3);
}

/* ============================================================
   RESOURCES DRAWER
   ============================================================ */
.drawer-overlay {
  position: fixed; inset: 0;
  background-color: rgba(16, 30, 54, 0.42);
  backdrop-filter: blur(3px);
  z-index: 100; opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease;
}
.drawer-overlay.active { opacity: 1; pointer-events: auto; }

.drawer {
  position: fixed; top: 0; right: -460px;
  width: 460px; max-width: 100%; height: 100vh;
  background-color: var(--bg-softer);
  box-shadow: var(--shadow-lg);
  z-index: 101; display: flex; flex-direction: column;
  transition: right 0.34s var(--transition-cubic);
}
.drawer.active { right: 0; }

.drawer-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 1.5rem 1.75rem; border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.drawer-header h3 { font-size: 1.1rem; font-weight: 700; }
.btn-close {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 9px;
  font-size: 1.3rem; line-height: 1; color: var(--ink-2); cursor: pointer;
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  transition: all 0.18s;
}
.btn-close:hover { color: var(--ink); background: var(--bg-tertiary); }

.drawer-content { flex: 1; overflow-y: auto; padding: 1.75rem; }
.resource-section { margin-bottom: 2rem; }
.resource-section h4 {
  font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink-3); font-weight: 700; margin-bottom: 0.9rem;
}
.resource-list { list-style: none; display: flex; flex-direction: column; gap: 0.7rem; }

.resource-link {
  display: flex; gap: 1rem; align-items: center;
  background-color: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-md);
  padding: 1rem 1.1rem;
  text-decoration: none; color: var(--ink);
  transition: all 0.18s;
}
.resource-link:hover { border-color: var(--brand); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.file-icon {
  font-size: 1.1rem; width: 38px; height: 38px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-tint); border-radius: 9px;
}
.resource-info { display: flex; flex-direction: column; gap: 0.2rem; }
.resource-info strong { font-size: 0.92rem; font-weight: 600; }
.resource-info span { font-size: 0.82rem; color: var(--ink-2); line-height: 1.45; }

/* ============================================================
   VIDEO
   ============================================================ */
.video-container {
  position: relative; width: 100%; max-width: 760px;
  margin: 0.5rem auto 0;
  aspect-ratio: 16 / 9;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  background-color: #000;
}
.video-container iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }

.video-placeholder {
  width: 100%;
  max-width: 760px;
  min-height: 250px;
  margin: 0.5rem auto 0;
  border: 1px dashed var(--line-2);
  border-radius: var(--border-radius-lg);
  background: var(--bg-soft);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  text-align: center;
  padding: 2rem;
  color: var(--ink-2);
  box-shadow: var(--shadow-sm);
}
.video-placeholder-label {
  color: var(--rmit-red);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============================================================
   LOADING
   ============================================================ */
.spinner {
  width: 38px; height: 38px;
  border: 3px solid var(--line);
  border-top-color: var(--brand);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.slide-loading { display: flex; height: 100%; }

/* ============================================================
   MOBILE SIDEBAR TOGGLE
   ============================================================ */
.sidebar-toggle { display: none; }
.sidebar-scrim {
  position: fixed; inset: 0;
  background-color: rgba(16, 30, 54, 0.42);
  backdrop-filter: blur(2px);
  z-index: 85; opacity: 0; pointer-events: none;
  transition: opacity 0.3s ease;
}
.sidebar-scrim.active { opacity: 1; pointer-events: auto; }

/* ============================================================
   WHOLE-COURSE CAPSTONE
   ============================================================ */
.lead-text {
  color: var(--ink-2);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: 1.5rem;
}

.capstone-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.capstone-topic-card,
.capstone-task,
.capstone-submission-note,
.capstone-form,
.capstone-verification-intro,
.capstone-success {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.capstone-topic-card { padding: 1.25rem; }
.capstone-topic-card h3 { color: var(--ink); font-size: 1.02rem; margin: 0.65rem 0 0.45rem; }
.capstone-topic-card p { color: var(--ink-2); font-size: 0.92rem; line-height: 1.65; }
.capstone-topic-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--brand-tint);
  color: var(--brand);
  font-size: 0.78rem;
  font-weight: 800;
}

.callout-box.capstone-principle {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  background: var(--accent-tint);
  color: var(--ink-2);
  line-height: 1.65;
}

.capstone-task { padding: 1.5rem; margin-bottom: 1.25rem; }
.capstone-task h3 { color: var(--ink); font-size: 1.15rem; margin: 0.9rem 0 0.55rem; }
.capstone-task p { color: var(--ink-2); line-height: 1.65; }
.capstone-task-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.capstone-badge {
  display: inline-flex;
  padding: 0.38rem 0.7rem;
  border-radius: 999px;
  color: var(--brand);
  background: var(--brand-tint);
  font-size: 0.78rem;
  font-weight: 800;
}
.capstone-badge.advanced { color: var(--accent); background: var(--accent-tint); }
.capstone-page-limit { color: var(--ink-3); font-size: 0.82rem; font-weight: 700; }
.capstone-question-list { margin: 0.9rem 0 0; padding-left: 1.35rem; color: var(--ink-2); }
.capstone-question-list li { margin-bottom: 0.65rem; padding-left: 0.3rem; line-height: 1.6; }
.capstone-question-list li::marker { color: var(--brand); font-weight: 800; }

.capstone-submission-note { padding: 1.25rem 1.4rem; background: var(--bg-soft); }
.capstone-submission-note h3 { color: var(--ink); font-size: 1rem; margin-bottom: 0.65rem; }
.capstone-checklist { list-style: none; margin: 0; padding: 0; }
.capstone-checklist li { position: relative; padding: 0.35rem 0 0.35rem 1.7rem; color: var(--ink-2); line-height: 1.55; }
.capstone-checklist li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--ok);
  font-weight: 800;
}

.external-tools { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem; margin-top: 1.25rem; }
.external-tool-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0.62rem 0.9rem;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  background: var(--panel);
  color: var(--brand);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 0.18s, transform 0.18s;
}
.external-tool-link:hover { border-color: var(--brand); transform: translateY(-1px); }

.capstone-verification-intro { padding: 1.25rem 1.4rem; margin-bottom: 1rem; color: var(--ink-2); line-height: 1.65; }
.test-account-card {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid var(--brand-tint-2);
  border-radius: var(--border-radius-md);
  background: var(--brand-tint);
}
.test-account-card > strong { color: var(--brand); }
.test-account-card > div {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
}
.test-account-card span { color: var(--ink-2); font-size: 0.84rem; font-weight: 700; }
.test-account-card code {
  width: fit-content;
  max-width: 100%;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-weight: 700;
}
.form-notice {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--brand-tint-2);
  background: var(--brand-tint);
  color: var(--ink-2);
}
.form-notice code { color: var(--brand); font-weight: 800; }
.capstone-form { padding: 1.5rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.form-field { display: flex; flex-direction: column; gap: 0.45rem; }
.form-field-wide { margin-bottom: 1rem; }
.form-field label { color: var(--ink); font-size: 0.9rem; font-weight: 700; }
.form-field label span { color: var(--accent); }
.form-field input {
  width: 100%;
  min-height: 46px;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--line-2);
  border-radius: 9px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.form-field input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-tint); }
.form-field input[aria-invalid='true'] { border-color: var(--err); }
.field-error { min-height: 1.15rem; color: var(--err); font-size: 0.8rem; }
.capstone-privacy { margin: 0.9rem 0; color: var(--ink-3); font-size: 0.82rem; line-height: 1.5; }
.form-status { display: none; margin: 0.8rem 0; padding: 0.8rem 0.9rem; border-radius: 8px; font-size: 0.88rem; line-height: 1.5; }
.form-status:not(:empty) { display: block; }
.form-status.info { color: var(--brand); background: var(--brand-tint); }
.form-status.error { color: var(--err); background: var(--err-tint); }
.form-status.success { color: var(--ok); background: var(--ok-tint); }

.capstone-success { max-width: 620px; margin: 1.5rem auto; padding: 2rem; text-align: center; }
.capstone-success.compact { margin-top: 0; }
.success-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  margin-bottom: 1rem;
  background: var(--ok-tint);
  color: var(--ok);
  font-size: 2.2rem;
  font-weight: 800;
}
.capstone-success h3 { color: var(--ink); margin-bottom: 0.75rem; }
.capstone-success p { color: var(--ink-2); line-height: 1.65; margin-bottom: 0.7rem; }
.capstone-success .btn { margin-top: 0.75rem; }
/* Module navigation and completion presentation */
.module-home-footer {
  padding: 0.9rem 1rem;
  border-top: 1px solid var(--line);
  background: var(--bg-softer);
}
.module-home-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  width: 100%;
  min-height: 44px;
  padding: 0.7rem 1rem;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  background: var(--panel);
  color: var(--ink);
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}
.module-home-link:hover {
  border-color: var(--brand);
  background: var(--brand-tint);
  transform: translateY(-1px);
}

.evaluation-portal-button {
  min-height: 56px;
  padding: 0.9rem 1.8rem;
  border-color: #c91420;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent) 0%, #c8102e 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(200, 16, 46, 0.22);
  font-size: 1rem;
  font-weight: 800;
}
.evaluation-portal-button:hover:not(:disabled) {
  border-color: #a90f27;
  background: linear-gradient(135deg, #d7192d 0%, #a90f27 100%);
  box-shadow: 0 10px 24px rgba(200, 16, 46, 0.28);
  transform: translateY(-2px);
}
.evaluation-portal-button .icon { width: 21px; height: 21px; }

.completion-frame {
  position: relative;
  max-width: 760px;
  margin: 1rem auto;
  padding: 3rem 3.25rem 2.5rem;
  overflow: hidden;
  border: 2px solid var(--brand-tint-2);
  border-radius: 18px;
  background: linear-gradient(160deg, #fff 0%, var(--bg-softer) 65%, var(--brand-tint) 100%);
  box-shadow: 0 18px 45px rgba(16, 30, 54, 0.13);
  text-align: center;
}
.completion-frame::before,
.completion-frame::after {
  content: '';
  position: absolute;
  width: 46px;
  height: 46px;
  pointer-events: none;
}
.completion-frame::before {
  top: 18px;
  left: 18px;
  border-top: 3px solid #b8871b;
  border-left: 3px solid #b8871b;
}
.completion-frame::after {
  right: 18px;
  bottom: 18px;
  border-right: 3px solid #b8871b;
  border-bottom: 3px solid #b8871b;
}
.completion-accent {
  position: absolute;
  inset: 0 0 auto;
  height: 8px;
  background: linear-gradient(90deg, var(--accent) 0 38%, var(--brand) 38% 100%);
}
.completion-trophy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 98px;
  height: 98px;
  margin-bottom: 1rem;
  border: 2px solid #d6b55f;
  border-radius: 50%;
  background: linear-gradient(145deg, #fff9e8, #f1dfad);
  color: #9a6a00;
  box-shadow: 0 8px 22px rgba(154, 106, 0, 0.18);
}
.completion-trophy svg { width: 58px; height: 58px; }
.completion-kicker {
  margin-bottom: 0.45rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.completion-frame h3 {
  margin-bottom: 1.25rem;
  color: var(--ink);
  font-size: 1.65rem;
  line-height: 1.3;
}
.completion-course-name {
  margin: 0 auto 1.3rem;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--brand-tint-2);
  border-left: 5px solid var(--accent);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.82);
  text-align: left;
}
.completion-course-name span {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--ink-3);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.completion-course-name strong {
  color: var(--brand);
  font-size: 1.03rem;
  line-height: 1.5;
}
.completion-message {
  max-width: 630px;
  margin: 0 auto 1.35rem;
  color: var(--ink-2);
  line-height: 1.7;
}
.completion-status {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 1rem;
  border: 1px solid #b8d8c5;
  border-radius: 999px;
  background: var(--ok-tint);
  color: var(--ok);
  font-size: 0.86rem;
  font-weight: 800;
}
.completion-status svg { width: 18px; height: 18px; }
.completion-kicker { font-size: 0.86rem; }
.completion-course-name {
  padding: 1.35rem 1.5rem;
  border: 2px solid var(--brand);
  border-left: 2px solid var(--brand);
  background: linear-gradient(145deg, #fff 0%, var(--brand-tint) 100%);
  box-shadow: inset 0 5px 0 var(--accent), 0 8px 20px rgba(0, 0, 84, 0.09);
  text-align: center;
}
.completion-course-name strong {
  display: block;
  color: var(--brand);
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: 0.045em;
  line-height: 1.6;
  text-align: center;
}

.livestream-teaser {
  max-width: 760px;
  margin: 1.1rem auto 0;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}
.livestream-teaser h3 {
  margin: 0 0 0.85rem;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.45;
  text-align: center;
}
.livestream-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}
.livestream-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 0.55rem;
  border: 1px solid var(--line-2);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}
.livestream-link:hover {
  border-color: var(--accent);
  background: var(--accent-tint);
}
.livestream-link strong { color: var(--brand); font-size: 0.85rem; }
.livestream-link .livestream-date { margin-top: 0.15rem; color: var(--ink-3); font-size: 0.74rem; }
.livestream-link .livestream-time { margin-top: 0.12rem; color: var(--ink-2); font-size: 0.74rem; font-weight: 700; }
/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 992px) {
  .sidebar {
    position: fixed; left: calc(-1 * var(--sidebar-width)); top: 0;
    height: 100vh; z-index: 90; box-shadow: var(--shadow-lg);
  }
  .sidebar.active { left: 0; }
  .glass-card { padding: 4.75rem 1.5rem 1.5rem; }
  .slide-footer { padding: 0.9rem 1.5rem; }
  .sidebar-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    position: fixed; top: 14px; left: 14px; z-index: 95;
    width: 44px; height: 44px; border-radius: 11px;
    background: var(--panel); border: 1px solid var(--line-2); color: var(--ink);
    box-shadow: var(--shadow-md); cursor: pointer;
  }
  .sidebar-toggle:active { background: var(--bg-soft); }
}
@media (max-width: 768px) {
  .grid-2col,
  .game-arena,
  .equality-equity-container { grid-template-columns: 1fr; gap: 1.25rem; }
  .slide-title { font-size: 1.55rem; }
  .quiz-question { font-size: 1.15rem; }
  .capstone-summary-grid,
  .form-grid { grid-template-columns: 1fr; }
  .capstone-task-head { align-items: flex-start; flex-direction: column; gap: 0.55rem; }
  .test-account-card > div { grid-template-columns: 1fr; gap: 0.2rem; }
  .completion-frame { padding: 2.5rem 1.35rem 2rem; }
  .completion-frame h3 { font-size: 1.4rem; }
  .livestream-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}

/* Global Quicksand body weight: body paragraphs + bullets = 500; short lead sentences keep inline 700 */
#slide-viewport { font-weight: 500; }