/* =========================================
   1. CORE VARIABLES & TOKENS
========================================= */
:where(
  [data-page="classeur"],
  [data-page="chapitres"],
  [data-page="bac-2026-hub"],
  [data-page="bac-2026-methods-chapter"]
) {
  /* Typography */
  --font-sans: var(--font-ui);
  --font-mono: var(--font-mono, monospace);

  /* Palette Deep Space */
  --bg-void: var(--app-bg, #020617);
  --bg-panel: var(--app-surface-weak, rgba(15, 23, 42, 0.7));
  --bg-card: var(--app-surface-weak, rgba(30, 41, 59, 0.4));
  --border-glass: var(--app-border, rgba(255, 255, 255, 0.08));
  --border-highlight: var(--app-border-strong, rgba(255, 255, 255, 0.15));

  /* Neon Accents */
  --color-primary: var(--app-accent-purple, #8b5cf6); /* Violet Magic */
  --color-primary-glow: rgb(var(--accent-purple-rgb, 139 92 246) / 0.5);

  --color-cyan: var(--app-accent-cyan, #22d3ee);    /* Tech Blue */
  --color-cyan-glow: rgb(var(--accent-cyan-rgb, 6 182 212) / 0.5);

  --color-emerald: var(--app-accent-green, #22c55e); /* Success */
  --color-rose: var(--app-accent-rose, var(--app-danger, #f43f5e));    /* Danger/Alert */
  --color-blue: var(--app-accent-blue, #3b82f6);
  --color-amber: var(--app-accent-gold, #f59e0b);   /* Gold/Coins */

  /* Glass layers */
  --glass-weak: rgb(255 255 255 / 0.03);
  --glass-weak-hover: rgb(255 255 255 / 0.06);
  --glass-soft: rgb(255 255 255 / 0.08);
  --glass-border-weak: rgb(255 255 255 / 0.1);
  --glass-border-strong: rgb(255 255 255 / 0.12);

  /* Drawer accents */
  --drawer-bg: rgba(15, 23, 42, 0.82);
  --drawer-header-bg: rgba(2, 6, 23, 0.35);
  --drawer-accent-1: rgb(var(--accent-cyan-rgb, 34 211 238) / 0.14);
  --drawer-accent-2: rgb(var(--accent-purple-rgb, 139 92 246) / 0.16);

  /* Hero accents */
  --hero-title-gradient: var(--accent-sweep);
  --hero-title-glow: rgb(var(--accent-green-rgb, 34 197 94) / 0.25);
  --hero-surface: linear-gradient(135deg, rgb(var(--accent-purple-rgb, 139 92 246) / 0.15), rgb(var(--accent-cyan-rgb, 34 211 238) / 0.05));
  --hero-border: rgb(var(--accent-purple-rgb, 139 92 246) / 0.2);
  --hero-shadow: 0 20px 40px -10px rgb(0 0 0 / 0.3);
  --hero-chip-bg: rgb(var(--accent-cyan-rgb, 34 211 238) / 0.1);
  --hero-chip-border: rgb(var(--accent-cyan-rgb, 34 211 238) / 0.2);
  --hero-chip-text: var(--color-cyan);
  --hero-meta: var(--app-muted);
  --hero-meta-separator: var(--app-dim);
  --hero-cta-bg: var(--app-contrast-bg);
  --hero-cta-ink: var(--color-primary);
  --hero-cta-shadow: 0 10px 20px rgb(0 0 0 / 0.2);
  --hero-cta-glow: rgb(255 255 255 / 0.4);

  /* Dimensions */
  --rail-width: 80px;
  --rail-expanded: 260px;
  --sidebar-width: 340px;
  --radius-2xl: 24px;
  --radius-xl: 16px;
  --radius-lg: 12px;

  /* Animations */
  --ease-elastic: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
.inline-link { color: inherit; text-decoration: underline; }

/* Match home background for classeur/chapitres */
:where(
  [data-page="classeur"],
  [data-page="chapitres"],
  [data-page="bac-2026-hub"],
  [data-page="bac-2026-methods-chapter"]
) {
  background-image:
    radial-gradient(circle at 50% 0%, rgb(var(--accent-purple-rgb, 139 92 246) / 0.15), transparent 50%),
    radial-gradient(circle at 100% 0%, rgb(var(--accent-green-rgb, 34 197 94) / 0.1), transparent 40%),
    radial-gradient(circle at 0% 100%, rgb(var(--accent-gold-rgb, 245 158 11) / 0.1), transparent 40%);
  background-attachment: fixed;
}

:where(
  [data-page="classeur"],
  [data-page="chapitres"],
  [data-page="bac-2026-hub"],
  [data-page="bac-2026-methods-chapter"]
) .app-layout {
  position: relative;
  z-index: 1;
}

:where(
  [data-page="classeur"],
  [data-page="chapitres"],
  [data-page="bac-2026-hub"],
  [data-page="bac-2026-methods-chapter"]
) .ambient-light {
  display: none;
}


/* =========================================
   2. GLOBAL ATMOSPHERE & ANIMATIONS
========================================= */
:where([data-page="classeur"], [data-page="chapitres"]) {
  background-color: var(--bg-void);
  color: var(--app-text, #f1f5f9);
  font-family: var(--font-sans);
  height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  position: relative;
}

/* Bac hub/catalog pages keep the same dashboard styling, but the document owns
   the vertical scroll to avoid mobile freezes caused by nested 100vh scrollers. */
:where([data-page="bac-2026-hub"], [data-page="bac-2026-methods-chapter"]) {
  background-color: var(--bg-void);
  color: var(--app-text, #f1f5f9);
  font-family: var(--font-sans);
  min-height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
  -webkit-overflow-scrolling: touch;
}

:where([data-page="bac-2026-hub"], [data-page="bac-2026-methods-chapter"]) .app-layout {
  min-height: 100dvh;
  height: auto;
}

:where([data-page="bac-2026-hub"], [data-page="bac-2026-methods-chapter"]) .main-stage {
  overflow: visible;
  overscroll-behavior-y: auto;
}

/* Moving Aurora Background */
.ambient-light {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: -1; pointer-events: none; overflow: hidden;
}
.orb {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4;
  animation: floatOrb 20s infinite alternate ease-in-out;
}
.orb-1 { top: -10%; left: -10%; width: 50vw; height: 50vw; background: var(--color-primary); animation-delay: 0s; }
.orb-2 { bottom: -10%; right: -10%; width: 40vw; height: 40vw; background: var(--color-cyan); animation-delay: -5s; }
.orb-3 { top: 40%; left: 40%; width: 30vw; height: 30vw; background: rgb(var(--accent-green-rgb, 34 197 94) / 0.15); animation-duration: 30s; }

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(50px, 30px) scale(1.1); }
}

/* Custom Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-subtle); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-highlight); }

/* =========================================
   6. RIGHT SIDEBAR (Gamification Panel)
========================================= */
.sidebar-right {
  background: var(--app-surface-weak);
  backdrop-filter: blur(20px);
  border-left: 1px solid var(--border-glass);
  padding: 40px 32px;
  display: flex; flex-direction: column; gap: 40px;
}

/* Wallet Module */
.wallet-container {
  background: linear-gradient(180deg, rgb(var(--accent-gold-rgb, 245 158 11) / 0.1), transparent);
  border: 1px solid rgb(var(--accent-gold-rgb, 245 158 11) / 0.2);
  border-radius: var(--radius-xl);
  padding: 24px; text-align: center; position: relative;
}
.wallet-container.mg {
  background: linear-gradient(180deg, rgb(var(--accent-cyan-rgb, 34 211 238) / 0.12), transparent);
  border: 1px solid rgb(var(--accent-cyan-rgb, 34 211 238) / 0.25);
}
.glow-coin {
  position: absolute; top: -20px; left: 50%; transform: translateX(-50%);
  width: 40px; height: 40px; background: var(--color-amber); border-radius: 50%;
  box-shadow: 0 0 30px var(--color-amber); opacity: 0.2; filter: blur(10px);
}
.wallet-container.mg .glow-coin {
  background: var(--color-cyan);
  box-shadow: 0 0 30px rgb(var(--accent-cyan-rgb, 34 211 238) / 0.9);
}
.balance-label { font-size: 0.75rem; text-transform: uppercase; color: var(--color-amber); letter-spacing: 0.1em; font-weight: 700; }
.balance-amount { font-family: var(--font-mono); font-size: 2.5rem; font-weight: 800; color: var(--app-text); margin: 8px 0; text-shadow: 0 0 20px rgb(var(--accent-gold-rgb, 245 158 11) / 0.3); }
.wallet-container.mg .balance-label { color: var(--color-cyan); }
.wallet-container.mg .balance-amount { text-shadow: 0 0 20px rgb(var(--accent-cyan-rgb, 34 211 238) / 0.3); }

.btn-topup {
  width: 100%; background: var(--app-contrast-bg); color: var(--app-contrast-ink); border: none; padding: 12px; border-radius: 12px; font-weight: 700; cursor: pointer; transition: 0.2s;
  display: block; text-decoration: none; text-align: center;
}
.btn-topup:hover { background: var(--color-amber); box-shadow: 0 0 15px var(--color-amber); }

/* Quests List */
.quest-list { display: flex; flex-direction: column; gap: 16px; }
.quest-card {
  display: flex; gap: 16px; align-items: center;
  padding: 16px; border-radius: 16px;
  background: var(--glass-weak); border: 1px solid transparent;
  transition: 0.2s;
}
.quest-card:hover { background: var(--glass-weak-hover); border-color: var(--glass-border-weak); }

.quest-icon {
  width: 40px; height: 40px; border-radius: 12px; background: var(--app-surface-strong);
  display: grid; place-items: center; font-size: 1.2rem; flex-shrink: 0;
}
.quest-meta { flex-grow: 1; }
.quest-meta h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; }
.progress-mini { width: 100%; height: 4px; background: var(--glass-soft); border-radius: 4px; overflow: hidden; margin-top: 6px; }
.progress-mini-fill { height: 100%; width: 0%; background: var(--color-primary); border-radius: 4px; }

.reward-tag { font-family: var(--font-mono); font-size: 0.7rem; color: var(--color-emerald); font-weight: 700; margin-top: 6px; display: block; }

/* =========================================
   7. RESPONSIVE
========================================= */
@media (max-width: 1200px) {
  .app-layout { grid-template-columns: var(--rail-width) 1fr; }
  .sidebar-right { display: none; } /* Hide gamification on tablet for now */
}
@media (max-width: 1024px) {
  :where(
    [data-page="classeur"],
    [data-page="chapitres"],
    [data-page="bac-2026-hub"],
    [data-page="bac-2026-methods-chapter"]
  ) .main-stage {
    padding: 32px 24px;
    padding-bottom: 120px;
  }
}
@media (max-width: 768px) {
  .app-layout { display: block; }
  .nav-rail { display: none; }
  :where([data-page="classeur"], [data-page="chapitres"]) .main-stage {
    height: 100dvh;
    padding: 24px 20px;
    padding-bottom: 120px;
  }
  :where([data-page="bac-2026-hub"], [data-page="bac-2026-methods-chapter"]) {
    background-attachment: scroll;
  }
  :where([data-page="bac-2026-hub"], [data-page="bac-2026-methods-chapter"]) .main-stage {
    height: auto;
    min-height: 0;
    overflow: visible;
    padding: 24px 20px;
    padding-bottom: 120px;
  }
  .mobile-nav { display: flex; } /* Assume mobile nav logic */
}

/* =========================================
   8. DRAWER (Partie → chapitres)
========================================= */
.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--ease-smooth);
  z-index: 1000;
}

.drawer {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  max-height: min(86dvh, 720px);
  transform: translateY(120%);
  opacity: 0;
  transition: transform 0.38s var(--ease-elastic), opacity 0.2s ease;
  z-index: 1001;

  background: var(--drawer-bg);
  border: 1px solid var(--glass-border-weak);
  border-radius: 24px;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.drawer::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(1200px 500px at 15% 10%, var(--drawer-accent-1), transparent 55%),
    radial-gradient(900px 420px at 85% 30%, var(--drawer-accent-2), transparent 60%);
  pointer-events: none;
}

.drawer.is-open { transform: translateY(0); opacity: 1; }
.drawer-backdrop.is-open { opacity: 1; pointer-events: auto; }

.drawer-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--drawer-header-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1;
}

.drawer-title { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.drawer-title h3 {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.drawer-title p {
  font-size: 0.85rem;
  color: var(--app-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.drawer-close {
  appearance: none;
  border: 1px solid var(--glass-border-weak);
  background: var(--glass-weak);
  color: var(--app-text);
  border-radius: 12px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform 0.18s var(--ease-smooth), background 0.18s var(--ease-smooth);
}
.drawer-close:hover { transform: translateY(-1px); background: var(--glass-soft); }

.drawer-body {
  position: relative;
  flex: 1;
  padding: 16px 18px 18px 18px;
  overflow: auto;
  max-height: min(78dvh, 650px);
  -webkit-overflow-scrolling: touch;
}

.drawer-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }

.chapter-tile {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 14px;
  border-radius: 16px;
  border: 1px solid var(--border-subtle);
  background: var(--glass-weak);
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s var(--ease-smooth), border-color 0.18s var(--ease-smooth), background 0.18s var(--ease-smooth);
}
.chapter-tile:hover { transform: translateY(-2px); border-color: var(--glass-border-strong); background: var(--glass-weak-hover); }

.chapter-left { display: flex; align-items: center; gap: 12px; min-width: 0; }
.chapter-badge {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgb(var(--accent-cyan-rgb, 34 211 238) / 0.12);
  border: 1px solid rgb(var(--accent-cyan-rgb, 34 211 238) / 0.22);
  color: var(--color-cyan);
  font-family: var(--font-mono);
  font-weight: 800;
  flex-shrink: 0;
}
.chapter-meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.chapter-meta strong {
  font-size: 0.95rem;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chapter-meta span {
  font-size: 0.8rem;
  color: var(--app-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.chapter-arrow {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-subtle);
  background: var(--glass-weak);
  flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
  .drawer,
  .drawer-backdrop,
  .chapter-tile,
  .data-card {
    transition: none !important;
  }
}

@media (min-width: 900px) {
  .drawer {
    left: 50%;
    right: auto;
    top: 50%;
    bottom: auto;
    width: min(560px, 92vw);
    max-height: min(70vh, 520px);
    transform: translate(-50%, -50%) scale(0.96);
    transition: transform 0.32s var(--ease-smooth), opacity 0.2s ease;
  }
  .drawer.is-open { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  .drawer-body { max-height: none; }
}