:root {
  /* ─── Background scale ───────────────── */
  --bg-0:    #030710;   /* page */
  --bg-1:    #070c18;   /* surface */
  --bg-2:    #0b1220;   /* card */
  --bg-3:    #121b2e;   /* raised / hover */

  /* ─── Text scale (use these, not inline colors) ─── */
  --text-1:  #f1f5f9;   /* high emphasis — headings, bold body */
  --text-2:  #cbd5e1;   /* body / default */
  --text-3:  #94a3b8;   /* secondary / labels */
  --text-4:  #7a8a9e;   /* tertiary / muted — tuned to clear 4.5:1 on bg-2 */

  /* ─── Borders ────────────────────────── */
  --border-1: rgba(148,163,184,0.08);
  --border-2: rgba(148,163,184,0.16);
  --border-cyan: rgba(34,211,238,0.22);

  /* ─── Accent (used sparingly) ────────── */
  --accent:     #22d3ee;
  --accent-2:   #0ea5e9;
  --accent-soft: rgba(34,211,238,0.08);
  --accent-softer: rgba(34,211,238,0.04);

  /* ─── Radii ─────────────────────────── */
  --r-sm:  6px;
  --r-md:  10px;
  --r-lg:  14px;
  --r-xl:  20px;

  /* ─── Fonts ─────────────────────────── */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* ─── Legacy aliases (keep old view code working) ─── */
  --navy:    var(--bg-0);
  --navy2:   var(--bg-1);
  --navy3:   var(--bg-2);
  --blue:    var(--accent-2);
  --cyan:    var(--accent);
  --white:   var(--text-1);
  --muted:   var(--text-3);
  --border:  var(--border-1);
  --border2: var(--border-2);
  --brand-primary:   var(--accent);
  --brand-secondary: var(--accent);
}
html, body { height: 100%; background: var(--bg-0); color: var(--text-2); font-family: var(--font-sans); }

/* Very subtle grid — barely visible, adds texture without noise */
body::before {
  content: "";
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(148,163,184,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.025) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none; z-index: 0;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 90%);
}
/* Ambient blobs removed — was too "dark theme demo" */
#app { position: relative; z-index: 1; }

.card {
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
}
.input {
  width: 100%;
  background: var(--bg-1);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  padding: 10px 14px;
  color: var(--text-1);
  outline: none;
  font-size: 14px;
  font-family: inherit;
  transition: border-color .15s;
}
.input::placeholder { color: var(--text-4); }
.input:focus { border-color: var(--accent); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: var(--r-md);
  font-weight: 600;
  font-size: 13px;
  font-family: inherit;
  transition: background .15s, border-color .15s, color .15s;
  cursor: pointer;
  border: 1px solid transparent;
  line-height: 1.2;
}
.btn-primary {
  background: var(--accent);
  color: #01121a;
  border: none;
}
.btn-primary:hover { background: #3de1f3; }
.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border-2);
}
.btn-ghost:hover { background: var(--bg-3); color: var(--text-1); border-color: var(--border-cyan); }
.btn-danger { background: transparent; color: #f87171; border-color: rgba(239,68,68,0.3); }
.btn-danger:hover { background: rgba(239,68,68,0.08); border-color: rgba(239,68,68,0.5); }
.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px; font-weight: 500;
  background: var(--bg-3);
  color: var(--text-3);
  border: 1px solid var(--border-1);
  text-transform: none; letter-spacing: 0;
}
.tab {
  padding: 8px 14px;
  border-radius: var(--r-md);
  color: var(--text-3);
  font-weight: 500; font-size: 13px;
  cursor: pointer;
  transition: color .15s, background .15s;
  background: transparent;
  border: none;
  font-family: inherit;
}
.tab:hover { color: var(--text-1); }
.tab.active { background: var(--accent-soft); color: var(--accent); }
.sidebar-link {
  display: flex; align-items: center; gap: 11px;
  padding: 9px 12px;
  border-radius: var(--r-md);
  color: var(--text-3);
  font-weight: 500; font-size: 13.5px;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.sidebar-link:hover { background: var(--bg-3); color: var(--text-1); }
.sidebar-link.active { background: var(--accent-soft); color: var(--accent); }
.sidebar-link.active::before { display: none; }  /* kill the cyan rail */
.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; padding: 10px 12px; font-size: 10px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; color: var(--text-4); border-bottom: 1px solid var(--border-1); }
.table td { padding: 13px 12px; border-bottom: 1px solid var(--border-1); font-size: 13.5px; color: var(--text-2); }
.table tr:hover td { background: var(--bg-3); color: var(--text-1); }

/* Impersonation banner — subtle, no glow */
#impersonation-banner {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-cyan);
  color: var(--text-2);
  padding: 9px 16px;
  text-align: center;
  font-weight: 500; font-size: 12.5px;
  display: flex; align-items: center; justify-content: center;
  gap: 12px;
}
#impersonation-banner .imp-pulse {
  display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: qdot 2.4s ease-in-out infinite;
}
#impersonation-banner .imp-role { color: var(--accent); font-weight: 700; }
@media (max-width: 768px) {
  .hide-mobile { display: none !important; }
}

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

/* Sidebars (admin/superadmin) — flat navy */
.app-sidebar {
  background: var(--bg-1);
  border-right: 1px solid var(--border-1);
}

/* Gentler qdot pulse */
@keyframes qdot { 0%,100% { opacity: 1; } 50% { opacity: .4; } }

/* ==========================================================================
   Mobile sidebar overlay
   ========================================================================== */
.mobile-menu-btn {
  display: none;
  position: fixed; top: 14px; left: 14px; z-index: 101;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(7,16,31,0.92);
  border: 1px solid var(--border2);
  color: var(--cyan);
  align-items: center; justify-content: center;
  cursor: pointer;
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px rgba(0,0,0,0.4), 0 0 30px rgba(14,165,233,0.1);
}
.mobile-menu-btn:active { transform: scale(0.95); }
@media (max-width: 900px) {
  .mobile-menu-btn { display: flex; }
  .app-sidebar {
    position: fixed !important;
    top: 0; bottom: 0; left: 0;
    width: 280px !important;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform .25s ease;
    display: flex !important;
    overflow-y: auto;
  }
  body.sidebar-open .app-sidebar {
    transform: none;
    box-shadow: 30px 0 60px rgba(0,0,0,0.5);
  }
  body.sidebar-open .mobile-scrim {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 99;
  }
  .app-main-shell {
    padding-top: 70px !important;
    padding-left: 16px !important;
    padding-right: 16px !important;
  }
}

/* ==========================================================================
   Global polish — scrollbar, focus rings, selection
   ========================================================================== */
::selection { background: rgba(34,211,238,0.25); color: var(--text-1); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(148,163,184,0.12);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(148,163,184,0.24); }
*:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ==========================================================================
   Typography helpers
   ========================================================================== */
.page-title {
  font-size: 26px; font-weight: 700; letter-spacing: -0.018em;
  color: var(--text-1);
  line-height: 1.2;
}
.page-eyebrow {
  display: inline-block;
  font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-4);
  margin-bottom: 6px;
}
.page-eyebrow::before { display: none; }
.page-subtitle { color: var(--text-3); font-size: 14px; margin-top: 6px; line-height: 1.55; }
.gradient-text {
  background: linear-gradient(120deg, var(--accent-2), var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ==========================================================================
   Card interaction — flat, subtle, professional
   ========================================================================== */
.card {
  position: relative;
  transition: border-color .15s, background .15s;
}
.card.card-interactive {
  cursor: pointer;
}
.card.card-interactive:hover {
  border-color: var(--border-cyan);
  background: var(--bg-3);
}
.card-glow::before { display: none; }

/* ==========================================================================
   Sidebar nav icons
   ========================================================================== */
.sidebar-link svg, .tab svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-link { transition: all .2s; }
.sidebar-link.active { position: relative; }
.sidebar-link.active::before {
  content: ''; position: absolute; left: 0; top: 25%; bottom: 25%;
  width: 3px; border-radius: 3px;
  background: linear-gradient(180deg, var(--blue), var(--cyan));
  box-shadow: 0 0 10px var(--cyan);
}

/* ==========================================================================
   Play-icon overlay on module cards
   ========================================================================== */
.play-overlay {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-3);
  color: var(--accent);
  font-size: 16px;
  border: 1px solid var(--border-cyan);
  transition: background .15s;
}
.card-interactive:hover .play-overlay { background: var(--accent-soft); }

/* ==========================================================================
   Empty state
   ========================================================================== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed var(--border-2);
  border-radius: var(--r-lg);
  background: var(--bg-1);
}
.empty-state .empty-icon {
  width: 48px; height: 48px; margin: 0 auto 14px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-3);
  border: 1px solid var(--border-1);
  color: var(--text-3); font-size: 20px;
}
.empty-state .empty-title { color: var(--text-1); font-size: 15px; font-weight: 600; }
.empty-state .empty-desc  { color: var(--text-3); font-size: 13px; margin-top: 6px; max-width: 340px; margin-left: auto; margin-right: auto; line-height: 1.5; }

/* ==========================================================================
   Skeleton shimmer
   ========================================================================== */
.skel {
  background: linear-gradient(90deg, rgba(14,165,233,0.05) 0%, rgba(14,165,233,0.12) 50%, rgba(14,165,233,0.05) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border-radius: 8px;
}
@keyframes shimmer { 0% { background-position: 200% 0 } 100% { background-position: -200% 0 } }

/* ==========================================================================
   Toast with icon
   ========================================================================== */
.qs-toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 2000;
  display: flex; align-items: center; gap: 11px;
  padding: 12px 16px 12px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: var(--r-md);
  color: var(--text-1);
  font-weight: 500; font-size: 13px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  animation: toast-in .2s ease-out;
  max-width: 380px;
}
.qs-toast .qs-toast-icon {
  width: 32px; height: 32px; flex-shrink: 0;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
}
.qs-toast.success .qs-toast-icon { background: rgba(34,197,94,0.15); color: #4ade80; border: 1px solid rgba(34,197,94,0.3); }
.qs-toast.error   .qs-toast-icon { background: rgba(239,68,68,0.15); color: #f87171; border: 1px solid rgba(239,68,68,0.3); }
.qs-toast.info    .qs-toast-icon { background: rgba(14,165,233,0.15); color: var(--cyan); border: 1px solid var(--border2); }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px) } to { opacity: 1; transform: none } }

/* ==========================================================================
   Hero section (learner home)
   ========================================================================== */
.hero {
  position: relative;
  padding: 40px 0 32px;
}
.hero-greeting {
  font-size: clamp(30px, 4.5vw, 42px);
  font-weight: 700;
  letter-spacing: -0.022em;
  line-height: 1.1;
  color: var(--text-1);
}
.hero-sub { color: var(--text-3); font-size: 15px; margin-top: 10px; max-width: 540px; line-height: 1.55; }
.hero-orgline {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 16px; padding: 5px 11px;
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  font-size: 11px; font-weight: 500;
  color: var(--text-3);
  letter-spacing: .03em;
}
.hero-orgline .live-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: qdot 2.4s ease-in-out infinite;
}

/* ==========================================================================
   Progress ring (small SVG)
   ========================================================================== */
.ring { position: relative; width: 56px; height: 56px; flex-shrink: 0; }
.ring svg { transform: rotate(-90deg); }
.ring .ring-bg { stroke: rgba(14,165,233,0.12); }
.ring .ring-fg { stroke: url(#qsgrad); stroke-linecap: round; transition: stroke-dashoffset .6s ease; }
.ring .ring-num {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 800; color: var(--cyan);
  font-family: 'JetBrains Mono', monospace;
}

/* ==========================================================================
   Section divider
   ========================================================================== */
.section-divider {
  display: flex; align-items: center;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-1);
}
.section-divider::before,
.section-divider::after { display: none; }
.section-divider .label {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--text-4);
}

/* ==========================================================================
   KPI card with accent bar
   ========================================================================== */
.kpi {
  padding: 20px;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
}
.kpi::before { display: none; }
.kpi .kpi-label { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-4); font-weight: 600; }
.kpi .kpi-val   { font-size: 28px; font-weight: 700; color: var(--text-1); margin-top: 8px; letter-spacing: -0.01em; font-variant-numeric: tabular-nums; }
.kpi .kpi-sub   { font-size: 12px; color: var(--text-4); margin-top: 4px; }

/* ==========================================================================
   Top-nav (learner) polish
   ========================================================================== */
.top-nav {
  background: var(--bg-1);
  border-bottom: 1px solid var(--border-1);
  padding: 14px 28px;
}
/* ==========================================================================
   Chat layout (ChatGPT-style)
   ========================================================================== */
.chat-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  height: calc(100vh - 240px);
  min-height: 500px;
}
@media (max-width: 900px) {
  .chat-layout { grid-template-columns: 1fr; height: auto; }
  .chat-sidebar { max-height: 200px; }
}
.chat-sidebar {
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
  padding: 12px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-conv-item {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px;
  border-radius: var(--r-md);
  cursor: pointer;
  transition: background .15s;
  border: 1px solid transparent;
}
.chat-conv-item:hover { background: var(--bg-3); }
.chat-conv-item.active {
  background: var(--accent-soft);
  border-color: var(--border-cyan);
}
.chat-conv-item .chat-conv-del {
  opacity: 0;
  width: 22px; height: 22px;
  border-radius: 6px;
  border: none;
  background: rgba(239,68,68,0.15);
  color: #fca5a5;
  font-size: 16px;
  cursor: pointer;
  flex-shrink: 0;
  transition: all .15s;
}
.chat-conv-item:hover .chat-conv-del { opacity: 1; }
.chat-conv-item .chat-conv-del:hover { background: rgba(239,68,68,0.3); }

.chat-main {
  display: flex;
  flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--border-1);
  border-radius: var(--r-lg);
  overflow: hidden;
  min-height: 0;
}
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.chat-input-wrap {
  padding: 14px;
  border-top: 1px solid var(--border);
  background: rgba(5,11,26,0.8);
}

/* ==========================================================================
   Toggle switch
   ========================================================================== */
.qs-toggle {
  width: 44px; height: 24px; border-radius: 999px;
  position: relative; cursor: pointer;
  background: rgba(14,165,233,0.12);
  border: 1px solid var(--border);
  transition: all .2s;
}
.qs-toggle:hover { border-color: var(--border2); }
.qs-toggle-knob {
  position: absolute; top: 2px; left: 2px;
  width: 18px; height: 18px; border-radius: 50%;
  background: #cbd5e1;
  transition: all .2s;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}
.qs-toggle.on {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-color: var(--cyan);
  box-shadow: 0 0 12px rgba(14,165,233,0.4);
}
.qs-toggle.on .qs-toggle-knob {
  transform: translateX(20px);
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4), 0 0 8px rgba(255,255,255,0.5);
}

.top-nav .brand-mark {
  width: 38px; height: 38px; border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; color: #01121a;
}

/* ==========================================================================
   In-app dialogs (replaces native confirm/alert)
   ========================================================================== */
.qs-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(3,9,22,0.75);
  backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: qs-fade-in .15s ease-out;
}
.qs-dialog {
  width: min(460px, 100%);
  background: rgba(9,18,33,0.97);
  border: 1px solid rgba(14,165,233,0.18);
  border-radius: 16px;
  padding: 24px;
  box-shadow:
    0 0 0 1px rgba(14,165,233,0.08),
    0 30px 80px rgba(0,0,0,0.7),
    0 0 60px rgba(14,165,233,0.08);
  animation: qs-pop-in .18s ease-out;
}
.qs-dialog-title { font-size: 18px; font-weight: 700; color: #e2e8f0; }
.qs-dialog-body { margin-top: 10px; font-size: 14px; color: #94a3b8; line-height: 1.5; }
.qs-dialog-actions { margin-top: 22px; display: flex; gap: 10px; justify-content: flex-end; }
@keyframes qs-fade-in { from { opacity: 0 } to { opacity: 1 } }
@keyframes qs-pop-in  { from { opacity: 0; transform: translateY(8px) scale(.98) } to { opacity: 1; transform: none } }

/* ==========================================================================
   Module Player — matches quartersmart-site/demo.html visual language
   ========================================================================== */

.player-shell { max-width: 1000px; margin: 0 auto; padding: 32px 20px 80px; }
.player-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; letter-spacing: .14em; font-weight: 800; text-transform: uppercase;
  color: #7dd3fc;
}
.player-title { font-size: 30px; font-weight: 800; line-height: 1.15; color: #f8fafc; margin-top: 8px; letter-spacing: -0.01em; }
.player-byline { display: flex; align-items: center; gap: 10px; font-size: 13.5px; font-weight: 500; color: #cbd5e1; margin-top: 8px; margin-bottom: 22px; }
.player-byline .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); animation: qdot 2s ease-in-out infinite; }
@keyframes qdot { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.85)} }
.player-hint { font-size: 13px; color: #cbd5e1; }

.video-wrap {
  position: relative; aspect-ratio: 16/9; width: 100%;
  border: 1px solid var(--border2);
  border-radius: 16px;
  overflow: hidden;
  background: #000;
  box-shadow:
    0 0 0 1px rgba(14,165,233,0.06),
    0 30px 80px rgba(0,0,0,0.55),
    0 0 80px rgba(14,165,233,0.08);
}
.video-wrap video, .video-wrap iframe { width: 100%; height: 100%; display: block; border: 0; }

/* Custom control bar — single source of truth for scrubbing */
.vctl {
  display: flex; align-items: center; gap: 14px;
  margin-top: 10px;
  padding: 10px 14px;
  background: rgba(7,16,31,0.75);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}
.vctl-btn {
  width: 34px; height: 34px; flex-shrink: 0;
  border-radius: 50%; border: none;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #030a17; font-size: 13px;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 14px rgba(14,165,233,0.35);
  transition: transform .15s;
}
.vctl-btn:hover { transform: scale(1.06); }
.vctl-time { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--muted); flex-shrink: 0; min-width: 90px; }
.vctl-fs { background: transparent; border: 1px solid var(--border2); color: var(--muted); width: 32px; height: 32px; border-radius: 8px; cursor: pointer; flex-shrink: 0; transition: all .15s; font-size: 14px; }
.vctl-fs:hover { color: var(--cyan); border-color: var(--cyan); }

/* Integrated progress / scrub bar with checkpoint dots */
.prog-wrap {
  position: relative; flex: 1;
  height: 18px;
  cursor: pointer;
}
.prog-track {
  position: absolute; top: 50%; left: 0; right: 0;
  height: 3px; background: rgba(14,165,233,0.14);
  border-radius: 999px; transform: translateY(-50%);
  overflow: visible;
}
.prog-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: 999px;
  box-shadow: 0 0 6px rgba(14,165,233,0.55);
  transition: width .1s linear;
}
.cp-dot {
  position: absolute; top: 50%;
  width: 10px; height: 10px; border-radius: 50%;
  transform: translate(-50%, -50%);
  z-index: 3;
  border: 1.5px solid var(--navy);
  pointer-events: none;
}
.cp-dot.pending { background: rgba(34,211,238,0.55); box-shadow: 0 0 5px rgba(34,211,238,0.7); }
.cp-dot.passed  { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.cp-dot.active  { background: #f87171; animation: cpulse 1s infinite; }
@keyframes cpulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(248,113,113,0.6); }
  50%     { box-shadow: 0 0 0 6px rgba(248,113,113,0); }
}

/* Pill toggle (Course / Review) */
.pill-toggle {
  display: inline-flex; background: rgba(5,11,26,0.8);
  border-radius: 22px; padding: 3px; gap: 3px;
  border: 1px solid var(--border);
}
.pill-opt {
  padding: 8px 18px; border-radius: 20px; font-size: 12.5px; font-weight: 700;
  cursor: pointer; border: none; background: transparent;
  color: #cbd5e1; transition: all .18s; white-space: nowrap;
}
.pill-opt:hover:not(.active) { color: #f1f5f9; background: rgba(14,165,233,0.08); }
.pill-opt.active {
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #030a17;
  box-shadow: 0 0 14px rgba(14,165,233,0.4);
}

/* Stats row under video */
.stats-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px;
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  background: rgba(5,11,26,0.55);
}
.stat { text-align: center; }
.stat-val {
  font-size: 24px; font-weight: 800; font-family: 'JetBrains Mono', monospace;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-lbl { font-size: 11px; color: #cbd5e1; margin-top: 4px; text-transform: uppercase; letter-spacing: .08em; font-weight: 600; }

/* Quiz modal */
.quiz-overlay {
  position: fixed; inset: 0; z-index: 999;
  background: rgba(3,9,22,0.78); backdrop-filter: blur(14px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
  animation: qs-fade-in .2s ease-out;
}
.quiz-modal {
  width: min(600px, 100%);
  background: rgba(9,18,33,0.97);
  border: 1px solid var(--border2);
  border-radius: 18px;
  padding: 28px;
  box-shadow:
    0 0 0 1px rgba(14,165,233,0.1),
    0 40px 100px rgba(0,0,0,0.75),
    0 0 80px rgba(14,165,233,0.12);
  animation: qs-pop-in .2s ease-out;
}
.quiz-eyebrow { font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan); }
.quiz-q { font-size: 18px; font-weight: 700; color: #f1f5f9; margin-top: 10px; line-height: 1.35; }
.quiz-opts { display: flex; flex-direction: column; gap: 10px; margin-top: 22px; }
.quiz-opt {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; border-radius: 12px;
  background: rgba(5,11,26,0.7);
  border: 1px solid var(--border);
  color: #e2e8f0; font-size: 14px; text-align: left;
  cursor: pointer; transition: all .15s;
}
.quiz-opt:hover { border-color: var(--cyan); background: rgba(14,165,233,0.06); transform: translateX(2px); }
.quiz-opt .letter { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--cyan); min-width: 16px; }
.quiz-footer { margin-top: 18px; text-align: center; font-size: 11px; color: #64748b; letter-spacing: .05em; text-transform: uppercase; }
.wrong-shake { animation: shake .4s ease; box-shadow: 0 0 0 3px rgba(248,113,113,0.6) !important; }
@keyframes shake { 0%,100%{transform:translateX(0)} 20%{transform:translateX(-6px)} 40%{transform:translateX(6px)} 60%{transform:translateX(-4px)} 80%{transform:translateX(4px)} }