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

:root {
  --bg: var(--ui-bg);
  --surface: var(--ui-surface);
  --surface2: var(--ui-surface-3);
  --border: var(--ui-border);
  --text: var(--ui-text);
  --muted: var(--ui-muted);
  --accent: var(--ui-accent);
  --accent2: var(--ui-accent-2);
  --accent-college: #10b981;
  --accent-lycee: #6366f1;
  --accent-red: #ef4444;
  --accent-orange: #f59e0b;
  --radius: var(--ui-radius);
}

body {
  font-family: var(--ui-font);
  background: var(--bg);
  color: var(--text);
  min-height: calc(100vh - var(--ui-bar-h, 0px));
  padding: 28px 16px 64px;
}

header { text-align: center; margin-bottom: 32px; }
header h1 { font-size: 1.7rem; font-weight: 800; }
.accent { color: var(--accent2); }
.subtitle { color: var(--muted); font-size: .85rem; margin-top: 6px; }

main { max-width: 960px; margin: 0 auto; }

/* ── Level groups ── */
.level-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-bottom: 18px;
}
.level-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.level-group-label {
  font-size: .7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  padding: 0 4px;
}
.level-btn-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Selector bars */
.selector-bar {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 14px;
}
.sel-btn {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: 8px 16px; border-radius: 10px; cursor: pointer; font-size: .8rem; font-weight: 600;
  transition: .2s;
}
.sel-btn:hover { color: var(--text); border-color: rgba(255,255,255,.15); }
.sel-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* College levels get green accent when active */
.level-btn-row:first-child .sel-btn.active {
  background: var(--accent-college);
  border-color: var(--accent-college);
}

.subject-bar { margin-bottom: 20px; }

/* Stats banner */
.stats-banner {
  display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; margin-bottom: 22px;
}
.stat-chip {
  background: var(--surface); border: 1px solid var(--border); padding: 8px 16px;
  border-radius: 10px; font-size: .78rem; color: var(--muted);
  display: flex; align-items: center; gap: 6px;
}
.stat-chip i { color: var(--accent2); }
.stat-chip .val { color: var(--text); font-weight: 700; }

/* Mode tabs */
.mode-tabs {
  display: flex; gap: 6px; justify-content: center; margin-bottom: 24px;
}
.mode-tab {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: 10px 20px; border-radius: 10px; cursor: pointer; font-size: .82rem; font-weight: 600;
  display: flex; align-items: center; gap: 8px; transition: .2s;
}
.mode-tab:hover { color: var(--text); }
.mode-tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── FICHES ── */
.fiche-list { display: flex; flex-direction: column; gap: 14px; }
.fiche-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: .2s;
}
.fiche-card:hover { border-color: var(--accent); }
.fiche-header {
  padding: 16px 20px; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
}
.fiche-header h3 { font-size: .95rem; font-weight: 700; }
.fiche-header .fiche-tag {
  font-size: .65rem; background: var(--surface2); padding: 4px 10px; border-radius: 6px; color: var(--accent2);
}
.fiche-header i.chevron { color: var(--muted); transition: .3s; }
.fiche-card.open .fiche-header i.chevron { transform: rotate(180deg); }
.fiche-body {
  max-height: 0; overflow: hidden; transition: max-height .4s ease;
}
.fiche-card.open .fiche-body { max-height: 3000px; }
.fiche-content {
  padding: 0 20px 20px; font-size: .85rem; line-height: 1.7; color: var(--muted);
}
.fiche-content strong { color: var(--text); }
.fiche-content ul { padding-left: 20px; margin: 8px 0; }
.fiche-content li { margin-bottom: 4px; }
.fiche-content .key-point {
  background: rgba(var(--ui-accent-rgb),.08); border-left: 3px solid var(--accent);
  padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 10px 0;
}
.fiche-content h4 { color: var(--accent2); margin: 12px 0 6px; font-size: .88rem; }
.fiche-content table { width: 100%; border-collapse: collapse; margin: 10px 0; font-size: .82rem; }
.fiche-content th, .fiche-content td { padding: 6px 8px; border: 1px solid var(--border); text-align: center; }

/* ── QUIZ ── */
.quiz-container { max-width: 700px; margin: 0 auto; }
.quiz-progress {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px;
  font-size: .8rem; color: var(--muted);
}
.quiz-progress-bar {
  flex: 1; height: 6px; background: var(--surface2); border-radius: 3px; margin: 0 16px;
  overflow: hidden;
}
.quiz-progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width .3s; }

.quiz-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; margin-bottom: 20px;
}
.quiz-card .question { font-size: 1rem; font-weight: 600; margin-bottom: 20px; line-height: 1.5; }
.quiz-options { display: flex; flex-direction: column; gap: 10px; }
.quiz-option {
  background: var(--surface2); border: 2px solid var(--border); border-radius: 10px;
  padding: 14px 18px; cursor: pointer; font-size: .88rem; transition: .2s;
  display: flex; align-items: center; gap: 12px;
}
.quiz-option:hover:not(.disabled) { border-color: var(--accent); }
.quiz-option .opt-letter {
  width: 28px; height: 28px; border-radius: 8px; background: var(--border);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: .8rem;
  flex-shrink: 0;
}
.quiz-option.correct { border-color: #10b981; background: rgba(16,185,129,.1); }
.quiz-option.correct .opt-letter { background: #10b981; color: #fff; }
.quiz-option.wrong { border-color: var(--accent-red); background: rgba(239,68,68,.1); }
.quiz-option.wrong .opt-letter { background: var(--accent-red); color: #fff; }
.quiz-option.disabled { cursor: default; opacity: .6; }

.quiz-explanation {
  margin-top: 16px; padding: 14px; border-radius: 10px;
  background: rgba(var(--ui-accent-rgb),.06); border: 1px solid rgba(var(--ui-accent-rgb),.2);
  font-size: .82rem; color: var(--muted); line-height: 1.5;
}
.quiz-explanation strong { color: var(--accent2); }

.quiz-btn-next {
  background: var(--accent); color: #fff; border: none; padding: 12px 28px;
  border-radius: 10px; font-size: .9rem; font-weight: 600; cursor: pointer;
  display: flex; align-items: center; gap: 8px; margin: 0 auto; transition: .2s;
}
.quiz-btn-next:hover { filter: brightness(1.1); }

.quiz-result {
  text-align: center; padding: 40px 20px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
}
.quiz-result .score { font-size: 3rem; font-weight: 900; color: var(--accent2); }
.quiz-result .score-label { font-size: 1rem; color: var(--muted); margin: 8px 0 20px; }
.quiz-result .score-detail { font-size: .85rem; color: var(--muted); }

/* ── FLASHCARDS ── */
.flashcard-area { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.flashcard-counter { font-size: .8rem; color: var(--muted); }
.flashcard {
  width: 100%; max-width: 500px; min-height: 280px; perspective: 800px; cursor: pointer;
}
.flashcard-inner {
  position: relative; width: 100%; height: 280px; transition: transform .6s;
  transform-style: preserve-3d;
}
.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }
.flashcard-front, .flashcard-back {
  position: absolute; inset: 0; backface-visibility: hidden;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 28px; text-align: center;
}
.flashcard-back { transform: rotateY(180deg); }
.flashcard-front .fc-label { font-size: .7rem; color: var(--accent); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.flashcard-front .fc-question { font-size: 1.1rem; font-weight: 700; line-height: 1.5; }
.flashcard-front .fc-hint { font-size: .75rem; color: var(--muted); margin-top: 16px; }
.flashcard-back .fc-answer { font-size: .95rem; line-height: 1.6; color: var(--muted); }
.flashcard-back .fc-answer strong { color: var(--text); }

.fc-nav { display: flex; gap: 10px; }
.fc-nav button {
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  padding: 10px 24px; border-radius: 10px; cursor: pointer; font-size: .82rem; font-weight: 600;
  display: flex; align-items: center; gap: 8px; transition: .2s;
}
.fc-nav button:hover { color: var(--text); border-color: var(--accent); }
.fc-nav button.primary { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ── Bac Français richtext helpers ── */
.bf-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 12px;
  border: 1px solid rgba(255,255,255,.1);
}
.bf-purple { background: rgba(155,93,229,.15); color: #c084fc; }
.bf-teal   { background: rgba(45,212,191,.12);  color: #2dd4bf; }
.bf-coral  { background: rgba(251,113,133,.12); color: #fb7185; }
.bf-amber  { background: rgba(245,158,11,.12);  color: #f59e0b; }

.bf-steps { display: flex; flex-direction: column; gap: 8px; margin: 12px 0; }
.bf-step  {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: .87rem;
  color: var(--muted);
}
.bf-num {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: rgba(var(--ui-accent-rgb),.18);
  color: var(--accent2);
  font-size: 11px;
  font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}

.bf-citation {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: .87rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.6;
}
.bf-citation em { font-style: normal; color: var(--muted); display: block; margin-top: 4px; font-size: .82rem; }
.bf-citation.teal  { border-left-color: #2dd4bf; }
.bf-citation.coral { border-left-color: #fb7185; }
.bf-citation.amber { border-left-color: #f59e0b; }

.bf-perso-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
  margin: 12px 0;
}
.bf-perso-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex; flex-direction: column; gap: 4px;
}
.bf-perso-card strong { font-size: .88rem; color: var(--text); }
.bf-perso-card span   { font-size: .81rem; color: var(--muted); line-height: 1.5; }

.bf-theme-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}
.bf-theme-tags span {
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11.5px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--muted);
}

/* Responsive */
@media (max-width: 600px) {
  .level-groups { flex-direction: column; align-items: center; }
  .mode-tabs { flex-direction: column; }
  .mode-tab { justify-content: center; }
  .quiz-card { padding: 20px; }
}