.page-content{padding:30px 20px 60px;max-width:1100px;margin:0 auto}.td-detail{background:var(--light, #fff);padding:44px;border-radius:16px;box-shadow:0 10px 30px #0000001f;position:relative;overflow:hidden}.td-detail:before{content:"";position:absolute;top:0;left:0;width:100%;height:6px;background:linear-gradient(90deg,var(--isep-blue-dark, hsl(200,48%,32%)),var(--isep-blue-medium, hsl(200,50%,40%)))}.td-detail h2{color:var(--primary, var(--isep-blue-dark));font-size:2rem;margin-bottom:10px;border-bottom:3px solid var(--primary, var(--isep-blue-dark));padding-bottom:14px;display:flex;align-items:center;gap:10px}.td-hero{background:linear-gradient(135deg,var(--isep-blue-dark, hsl(200,48%,32%)) 0%,var(--isep-blue-medium, hsl(200,50%,40%)) 100%);padding:56px 0 44px;color:#fff;text-align:center}.td-hero .hero-title{color:#fff;font-size:2.4rem;margin-bottom:10px}.td-hero .hero-description{color:#ffffffe0;font-size:1.15rem;max-width:640px;margin:0 auto 20px}.td-hero .hero-meta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:16px}.td-hero .meta-badge{background:#ffffff2e;color:#fff;border:1px solid rgba(255,255,255,.3);padding:6px 16px;border-radius:20px;font-size:.85rem;font-weight:600;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.back-btn{display:inline-flex;align-items:center;gap:8px;margin-bottom:28px;padding:10px 20px;background:var(--primary, var(--isep-blue-dark));color:#fff;text-decoration:none;border-radius:8px;font-weight:600;font-size:.9rem;box-shadow:0 2px 8px #00000026;transition:all .3s ease}.back-btn:hover{background:var(--primary-dark, var(--isep-blue-medium));transform:translateY(-2px);box-shadow:0 4px 14px #0003}.section-description{color:var(--gray, #666);margin-bottom:28px;font-size:1.05rem;line-height:1.75;padding:14px 18px;background:#2c668212;border-radius:8px;border-left:4px solid var(--primary, var(--isep-blue-dark))}.separator{border:none;height:1px;background:linear-gradient(to right,transparent,var(--primary, var(--isep-blue-dark)),transparent);margin:40px 0}.fiche-revision{border-left:5px solid var(--primary, var(--isep-blue-dark));padding:24px;margin:28px 0;background:#2c66820f;border-radius:0 12px 12px 0;box-shadow:0 2px 8px #0000000f}.probability-table{width:100%;border-collapse:collapse;margin:15px 0;box-shadow:var(--shadow-sm, 0 2px 6px rgba(0,0,0,.08))}.probability-table th,.probability-table td{padding:12px 15px;text-align:center;border:1px solid #ddd}.probability-table th{background-color:var(--primary, var(--isep-blue-dark));color:#fff;font-weight:600}.probability-table tr:nth-child(2n){background-color:#f9f9f9}.probability-table tr:hover{background-color:#f1f1f1}[data-theme=dark] .probability-table tr:nth-child(2n){background-color:#ffffff0a}[data-theme=dark] .probability-table tr:hover{background-color:#ffffff14}[data-theme=dark] .probability-table td{border-color:#ffffff1f}.section-title{color:var(--primary, var(--isep-blue-dark));margin-top:3rem;margin-bottom:1.5rem;font-size:1.8rem;display:flex;align-items:center;gap:10px}.fiche-revision h3{color:var(--primary, var(--isep-blue-dark));padding-bottom:10px;margin-bottom:18px;font-size:1.4rem;display:flex;align-items:center;gap:10px}.fiche-revision h4{margin-top:1.6rem;color:var(--primary, var(--isep-blue-dark));font-size:1.1rem;padding-bottom:6px;border-bottom:1px dashed rgba(44,102,130,.3)}.fiche-revision p{margin-bottom:14px;line-height:1.7}.exercice{border:1px solid var(--light-gray, #e9ecef);padding:24px;margin-top:24px;border-radius:12px;box-shadow:0 2px 8px #0000000f;background:var(--light, #fff);transition:all .3s ease;animation:fadeIn .4s ease-out}.exercice:hover{box-shadow:0 6px 20px #0000001f;transform:translateY(-2px)}.exercice-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}.exercice h4{color:var(--dark, #2c3e50);font-size:1.2rem}.difficulty{padding:5px 12px;border-radius:20px;font-size:.8rem;font-weight:700}.facile{background:#e8f5e9;color:#2e7d32;border:1px solid #c8e6c9}.moyen{background:#fff3e0;color:#e65100;border:1px solid #ffe0b2}.difficile{background:#fce4ec;color:#b71c1c;border:1px solid #f8bbd0}.toggle-solution{display:inline-flex;align-items:center;gap:8px;background:var(--primary, var(--isep-blue-dark));color:#fff;border:none;padding:10px 20px;margin-top:14px;border-radius:8px;cursor:pointer;font-weight:600;font-size:.9rem;transition:all .3s ease}.toggle-solution:hover{background:var(--primary-dark, var(--isep-blue-medium));transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.solution{margin-top:18px;padding:0 18px;border-left:4px solid var(--primary, var(--isep-blue-dark));background:#2c66820a;border-radius:0 8px 8px 0;opacity:0;max-height:0;overflow:hidden;transition:all .4s ease-out}.solution.active{opacity:1;max-height:3000px;padding:20px 18px}.formula{background:var(--dark, #1e2a35);color:#e2e8f0;padding:18px 22px;margin:14px 0;border-radius:8px;overflow-x:auto;font-family:Courier New,Courier,monospace;font-size:1rem;line-height:1.6;box-shadow:0 2px 8px #00000026;border-left:4px solid var(--isep-yellow, hsl(48,100%,65%))}.example{margin-top:18px;border-left:4px solid var(--isep-yellow, hsl(48,100%,65%));padding:18px;background:#ffe03c14;border-radius:0 8px 8px 0}.example h4{color:#b45309;margin-top:0;font-size:1.1rem;display:flex;align-items:center;gap:8px}.topic-card{padding:20px;background:#2c66820d;border-radius:10px;margin-top:20px;border-left:4px solid var(--primary, var(--isep-blue-dark));animation:fadeIn .4s ease-out}.topic-card h4{color:var(--primary, var(--isep-blue-dark));margin-bottom:14px;font-size:1.2rem}.topic-card ul{padding-left:20px}.topic-card li{margin-bottom:8px;line-height:1.65}.quiz-box{border:2px solid var(--primary, var(--isep-blue-dark));background:#2c66820f}.quiz-box h4{color:var(--primary, var(--isep-blue-dark))!important}ul,ol{padding-left:22px;margin-bottom:14px}li{margin-bottom:7px;line-height:1.65}@keyframes fadeIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.exercice,.fiche-revision,.topic-card{animation:fadeIn .4s ease-out}@media (max-width: 768px){.page-content{padding:16px 12px 40px}.td-detail{padding:22px 18px}.td-detail h2{font-size:1.5rem}.td-hero .hero-title{font-size:1.7rem}.exercice-header{flex-direction:column;align-items:flex-start}.formula{font-size:.85rem;padding:14px}}[data-theme=dark] .td-detail{background:var(--light, #1f2937)}[data-theme=dark] .exercice{background:var(--light, #1f2937);border-color:var(--light-gray, #374151)}[data-theme=dark] .formula{background:#0f172a;color:#e2e8f0}[data-theme=dark] .section-description,[data-theme=dark] .fiche-revision{background:#2c668226}