/* ============================================================
   TSSR Révision — Feuille de style principale
   ============================================================ */
*{box-sizing:border-box;margin:0;padding:0}

/* ── Variables thème clair (défaut) ──────────────────────── */
:root{
  --primary:#3b82f6;--primary-dark:#2563eb;--secondary:#10b981;
  --bg:#f1f5f9;--card:#fff;--text:#1e293b;--muted:#64748b;
  --border:#e2e8f0;--radius:12px;--shadow:0 2px 12px rgba(0,0,0,.08);
  --input-bg:#fff;--input-border:#d1d5db;
  --nav-bg:#1e3a5f;
  --section-header-bg:#f8fafc;--section-header-hover:#f1f5f9;
  --table-header:#f8fafc;--table-row-hover:#f8fafc;
  --code-bg:#f1f5f9;
  --select-bg:#fff;--select-color:#374151;
  --modal-bg:#fff;
  --fc-back-bg:#fff;--fc-back-border:#e2e8f0;
  --option-btn-bg:#fff;--option-btn-color:#374151;
  --explanation-bg:#eff6ff;
  --exam-nav-bg:#fff;
  --alert-info-bg:#eff6ff;--alert-info-border:#bfdbfe;--alert-info-color:#1d4ed8;
  --alert-warn-bg:#fffbeb;--alert-warn-border:#fde68a;--alert-warn-color:#92400e;
  --footer-bg:#1e3a5f;
}

/* ── Variables thème sombre ──────────────────────────────── */
[data-theme="dark"]{
  --bg:#0f172a;--card:#1e293b;--text:#e2e8f0;--muted:#94a3b8;
  --border:#334155;--shadow:0 2px 16px rgba(0,0,0,.4);
  --input-bg:#0f172a;--input-border:#475569;
  --nav-bg:#0c1f3a;
  --section-header-bg:#162032;--section-header-hover:#1e293b;
  --table-header:#162032;--table-row-hover:#162032;
  --code-bg:#0f172a;
  --select-bg:#0f172a;--select-color:#e2e8f0;
  --modal-bg:#1e293b;
  --fc-back-bg:#1e293b;--fc-back-border:#334155;
  --option-btn-bg:#0f172a;--option-btn-color:#e2e8f0;
  --explanation-bg:#172554;
  --exam-nav-bg:#0f172a;
  --alert-info-bg:#172554;--alert-info-border:#1e40af;--alert-info-color:#93c5fd;
  --alert-warn-bg:#1c1402;--alert-warn-border:#854d0e;--alert-warn-color:#fde68a;
  --footer-bg:#0c1f3a;
}

/* ── Transition douce lors du changement de thème ──────── */
body,
.card,.stat,.section-card,.question-box,.fc-back,.option-btn,
.navbar,.site-footer,input,select,textarea,.modal,
.score-table th,.score-table td,.form-select,
.fiche-nav a,.badge-blue,.badge-green,.badge-yellow,.badge-red,.badge-purple{
  transition:background-color .25s ease, color .25s ease, border-color .25s ease;
}

body{font-family:'Segoe UI',system-ui,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}

/* ── NAV ────────────────────────────────────────────────── */
.navbar{background:var(--nav-bg);padding:0 24px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-height:60px;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px rgba(0,0,0,.3)}
.nav-brand{color:#fff;font-size:1.2rem;font-weight:700;text-decoration:none;margin-right:16px;white-space:nowrap}
.nav-links{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.nav-links a{color:#cbd5e1;text-decoration:none;padding:6px 12px;border-radius:8px;font-size:.9rem;transition:.2s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.15);color:#fff}
.nav-user{display:flex;align-items:center;gap:8px;color:#cbd5e1;font-size:.85rem;white-space:nowrap}
.btn-sm{background:rgba(255,255,255,.2);color:#fff;border:none;padding:4px 10px;border-radius:6px;cursor:pointer;font-size:.8rem;text-decoration:none;transition:.2s}
.btn-sm:hover{background:rgba(255,255,255,.3)}

/* ── Bouton dark mode ───────────────────────────────────── */
#theme-toggle{background:rgba(255,255,255,.15);border:none;color:#fff;padding:5px 10px;border-radius:6px;cursor:pointer;font-size:1rem;line-height:1;transition:.2s;display:flex;align-items:center;gap:4px}
#theme-toggle:hover{background:rgba(255,255,255,.28)}

/* ── LAYOUT ─────────────────────────────────────────────── */
main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:32px 24px}
.page-header{margin-bottom:28px}
.page-header h1{font-size:1.8rem;color:var(--text)}
.page-header p{color:var(--muted);margin-top:6px}

/* ── CARDS ──────────────────────────────────────────────── */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;border:1px solid var(--border)}
.card-sm{padding:16px}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fill,minmax(220px,1fr))}

/* ── MODULE CARDS ───────────────────────────────────────── */
.module-card{border-radius:var(--radius);padding:20px;color:#fff;text-decoration:none;display:block;transition:.2s;position:relative;overflow:hidden}
.module-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.25)}
.module-card .mc-icon{font-size:2.5rem;margin-bottom:10px}
.module-card .mc-code{font-size:.75rem;opacity:.8;font-weight:600;text-transform:uppercase;letter-spacing:.05em}
.module-card h3{font-size:1rem;margin-bottom:6px}
.module-card p{font-size:.82rem;opacity:.85;line-height:1.4}
.module-card .mc-count{position:absolute;top:12px;right:12px;background:rgba(255,255,255,.25);padding:2px 8px;border-radius:20px;font-size:.75rem}

/* ── BADGES ─────────────────────────────────────────────── */
.badge{display:inline-block;padding:2px 10px;border-radius:20px;font-size:.75rem;font-weight:600}
.badge-blue{background:#dbeafe;color:#1d4ed8}
.badge-green{background:#d1fae5;color:#065f46}
.badge-yellow{background:#fef3c7;color:#92400e}
.badge-red{background:#fee2e2;color:#991b1b}
.badge-purple{background:#ede9fe;color:#5b21b6}
[data-theme="dark"] .badge-blue{background:#1e3a8a;color:#93c5fd}
[data-theme="dark"] .badge-green{background:#064e3b;color:#6ee7b7}
[data-theme="dark"] .badge-yellow{background:#451a03;color:#fde68a}
[data-theme="dark"] .badge-red{background:#450a0a;color:#fca5a5}
[data-theme="dark"] .badge-purple{background:#2e1065;color:#c4b5fd}

/* ── STATS BAR ──────────────────────────────────────────── */
.stat-bar{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:28px}
.stat{background:var(--card);border-radius:var(--radius);padding:16px 24px;flex:1;min-width:140px;text-align:center;box-shadow:var(--shadow);border:1px solid var(--border)}
.stat .stat-val{font-size:2rem;font-weight:700;color:var(--primary)}
.stat .stat-lbl{font-size:.8rem;color:var(--muted);margin-top:4px}

/* ── BUTTONS ────────────────────────────────────────────── */
.btn{display:inline-block;padding:10px 20px;border:none;border-radius:8px;font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;transition:.2s;text-align:center}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}
.btn-success{background:var(--secondary);color:#fff}.btn-success:hover{background:#059669}
.btn-outline{background:transparent;color:var(--primary);border:2px solid var(--primary)}.btn-outline:hover{background:var(--primary);color:#fff}
.btn-danger{background:#ef4444;color:#fff}.btn-danger:hover{background:#dc2626}
.btn-gray{background:var(--border);color:var(--text)}.btn-gray:hover{filter:brightness(.92)}
.btn-lg{padding:14px 28px;font-size:1.05rem;border-radius:10px}
.btn-block{display:block;width:100%}

/* ── INPUTS / FORMS ─────────────────────────────────────── */
input[type="text"],input[type="email"],input[type="password"],input[type="search"],textarea{
  background:var(--input-bg);color:var(--text);border-color:var(--input-border);
}
input:focus,textarea:focus{outline:none;border-color:var(--primary)}
.form-select{width:100%;padding:10px 14px;border:1.5px solid var(--input-border);border-radius:8px;font-size:.95rem;background:var(--select-bg);color:var(--select-color);cursor:pointer}
.form-select:focus{outline:none;border-color:var(--primary)}

/* ── FICHE ──────────────────────────────────────────────── */
.fiche-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
.fiche-nav a{padding:6px 14px;background:var(--border);border-radius:20px;font-size:.85rem;text-decoration:none;color:var(--text);transition:.2s}
.fiche-nav a:hover,.fiche-nav a.active{background:var(--primary);color:#fff}
.fiche-content{line-height:1.7}
.fiche-content h2{font-size:1.2rem;color:var(--text);margin:20px 0 10px;padding-bottom:6px;border-bottom:2px solid var(--border)}
.fiche-content h3{font-size:1rem;color:var(--text);margin:14px 0 6px}
.fiche-content p{margin-bottom:10px;color:var(--text)}
.section-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;border-left:4px solid var(--primary);overflow:hidden}
.section-card .sc-header{padding:14px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text);background:var(--section-header-bg)}
.section-card .sc-header:hover{background:var(--section-header-hover)}
.section-card .sc-body{padding:16px 20px;color:var(--text);line-height:1.7;border-top:1px solid var(--border);display:none}
.section-card.open .sc-body{display:block}
.section-card .sc-arrow{transition:.3s;font-size:1.2rem}
.section-card.open .sc-arrow{transform:rotate(180deg)}

/* ── QUIZ ───────────────────────────────────────────────── */
.quiz-wrap{max-width:720px;margin:0 auto}
.question-box{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);margin-bottom:20px}
.q-number{font-size:.8rem;color:var(--muted);font-weight:600;text-transform:uppercase;margin-bottom:8px}
.q-text{font-size:1.1rem;font-weight:600;color:var(--text);margin-bottom:20px;line-height:1.5}
.options{display:flex;flex-direction:column;gap:10px}
.option-btn{padding:12px 18px;border:2px solid var(--border);border-radius:10px;background:var(--option-btn-bg);cursor:pointer;text-align:left;font-size:.95rem;transition:.2s;color:var(--option-btn-color);display:flex;align-items:center;gap:10px}
.option-btn:hover:not(:disabled){border-color:var(--primary);background:var(--explanation-bg)}
.option-btn.correct{border-color:#10b981;background:#d1fae5;color:#065f46;font-weight:600}
.option-btn.wrong{border-color:#ef4444;background:#fee2e2;color:#991b1b}
.option-btn:disabled{cursor:default}
[data-theme="dark"] .option-btn.correct{background:#064e3b;color:#6ee7b7}
[data-theme="dark"] .option-btn.wrong{background:#450a0a;color:#fca5a5}
.option-letter{width:28px;height:28px;border-radius:50%;background:var(--border);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.85rem;flex-shrink:0;color:var(--text)}
.option-btn.correct .option-letter{background:#10b981;color:#fff}
.option-btn.wrong .option-letter{background:#ef4444;color:#fff}
.explanation-box{margin-top:16px;padding:14px 16px;background:var(--explanation-bg);border-left:4px solid var(--primary);border-radius:0 8px 8px 0;font-size:.9rem;color:var(--text)}
.progress-bar{background:var(--border);border-radius:10px;height:8px;margin-bottom:20px;overflow:hidden}
.progress-fill{background:linear-gradient(90deg,#3b82f6,#10b981);height:100%;border-radius:10px;transition:.4s}
.quiz-timer{font-size:.9rem;color:var(--muted);font-weight:600}
.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.score-circle{width:120px;height:120px;border-radius:50%;margin:0 auto 20px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:2rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#3b82f6,#1d4ed8)}
.score-circle.good{background:linear-gradient(135deg,#10b981,#059669)}
.score-circle.bad{background:linear-gradient(135deg,#ef4444,#dc2626)}

/* ── FLASHCARDS ─────────────────────────────────────────── */
.fc-wrap{max-width:600px;margin:0 auto}
.fc-card{perspective:1000px;height:220px;cursor:pointer;margin-bottom:20px}
.fc-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:.6s}
.fc-card.flipped .fc-inner{transform:rotateY(180deg)}
.fc-front,.fc-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;border-radius:var(--radius);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px;text-align:center;box-shadow:var(--shadow)}
.fc-front{background:linear-gradient(135deg,#1e3a5f,#3b82f6);color:#fff}
.fc-front .fc-cat{font-size:.75rem;opacity:.7;text-transform:uppercase;letter-spacing:.05em;margin-bottom:10px}
.fc-front .fc-term{font-size:1.6rem;font-weight:700}
.fc-front .fc-hint{font-size:.8rem;opacity:.6;margin-top:16px}
.fc-back{background:var(--fc-back-bg);border:2px solid var(--fc-back-border);transform:rotateY(180deg);color:var(--text)}
.fc-back .fc-def{font-size:.95rem;line-height:1.6}
.fc-controls{display:flex;gap:10px;justify-content:center;margin-bottom:20px}
.fc-counter{text-align:center;color:var(--muted);font-size:.9rem;margin-bottom:10px}
.fc-known{background:#d1fae5;border-color:#10b981;color:#065f46}
.fc-unknown{background:#fee2e2;border-color:#ef4444;color:#991b1b}
[data-theme="dark"] .fc-known{background:#064e3b;color:#6ee7b7}
[data-theme="dark"] .fc-unknown{background:#450a0a;color:#fca5a5}

/* ── EXAMEN ─────────────────────────────────────────────── */
.exam-header-bar{background:#1e3a5f;color:#fff;padding:16px 24px;border-radius:var(--radius);margin-bottom:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
[data-theme="dark"] .exam-header-bar{background:#0c1f3a}
.exam-timer{font-size:1.4rem;font-weight:700;font-family:monospace}
.exam-timer.urgent{color:#fca5a5;animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
.exam-grid{display:flex;gap:24px;align-items:flex-start}
.exam-questions{flex:1;min-width:0}
.exam-sidebar{width:200px;flex-shrink:0;position:sticky;top:80px}
.exam-nav-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.exam-nav-btn{padding:6px;border:1.5px solid var(--border);border-radius:6px;background:var(--exam-nav-bg);cursor:pointer;font-size:.8rem;text-align:center;transition:.2s;color:var(--text)}
.exam-nav-btn.answered{background:#dbeafe;border-color:#3b82f6;color:#1d4ed8}
.exam-nav-btn.current{background:#1e3a5f;color:#fff;border-color:#1e3a5f}
[data-theme="dark"] .exam-nav-btn.answered{background:#1e3a8a;color:#93c5fd}

/* ── SCORES ─────────────────────────────────────────────── */
.score-table{width:100%;border-collapse:collapse}
.score-table th{background:var(--table-header);padding:10px 14px;text-align:left;font-size:.85rem;color:var(--muted);font-weight:600;border-bottom:2px solid var(--border)}
.score-table td{padding:10px 14px;border-bottom:1px solid var(--border);font-size:.9rem;color:var(--text)}
.score-table tr:hover td{background:var(--table-row-hover)}
.score-pct{font-weight:700}
.pct-high{color:#10b981}.pct-med{color:#f59e0b}.pct-low{color:#ef4444}

/* ── MODAL ──────────────────────────────────────────────── */
.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:1000;align-items:center;justify-content:center}
.modal-overlay.open{display:flex}
.modal{background:var(--modal-bg);border-radius:var(--radius);padding:32px;max-width:480px;width:90%;box-shadow:0 20px 60px rgba(0,0,0,.4);color:var(--text)}

/* ── SEARCH ─────────────────────────────────────────────── */
.search-box{position:relative}
.search-box input{padding-left:40px;width:100%;padding-top:10px;padding-bottom:10px;border:1.5px solid var(--input-border);border-radius:8px;font-size:.95rem;background:var(--input-bg);color:var(--text)}
.search-box::before{content:'🔍';position:absolute;left:12px;top:50%;transform:translateY(-50%)}

/* ── ALERTS ─────────────────────────────────────────────── */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px;font-size:.9rem}
.alert-info{background:var(--alert-info-bg);border:1px solid var(--alert-info-border);color:var(--alert-info-color)}
.alert-success{background:#d1fae5;border:1px solid #6ee7b7;color:#065f46}
[data-theme="dark"] .alert-success{background:#064e3b;border-color:#065f46;color:#6ee7b7}
.alert-warn{background:var(--alert-warn-bg);border:1px solid var(--alert-warn-border);color:var(--alert-warn-color)}
.alert-danger{background:#fee2e2;border:1px solid #fca5a5;color:#991b1b}
[data-theme="dark"] .alert-danger{background:#450a0a;border-color:#991b1b;color:#fca5a5}

/* ── DIFFICULTY ─────────────────────────────────────────── */
.diff-1::after{content:'⭐';font-size:.8rem}
.diff-2::after{content:'⭐⭐';font-size:.8rem}
.diff-3::after{content:'⭐⭐⭐';font-size:.8rem}

/* ── FOOTER ─────────────────────────────────────────────── */
.site-footer{background:var(--footer-bg);color:#94a3b8;padding:16px 24px;margin-top:auto}
.footer-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.85rem}

/* ── SCROLLBAR dark mode ────────────────────────────────── */
[data-theme="dark"]{color-scheme:dark}
[data-theme="dark"] ::-webkit-scrollbar{width:8px;height:8px}
[data-theme="dark"] ::-webkit-scrollbar-track{background:#0f172a}
[data-theme="dark"] ::-webkit-scrollbar-thumb{background:#334155;border-radius:4px}
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover{background:#475569}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media(max-width:768px){
  main{padding:16px}
  .exam-grid{flex-direction:column}
  .exam-sidebar{width:100%;position:static}
  .navbar{padding:0 16px}
  .nav-links a{padding:6px 8px;font-size:.8rem}
}