*{margin:0;padding:0;box-sizing:border-box}body{font-family:Source Sans Pro,Helvetica Neue,Helvetica,Arial,sans-serif;line-height:1.6;color:#24292e;background-color:#f6f6f6}.container{width:92%;max-width:1280px;margin:0 auto;padding:0 15px}h1,h2,h3,h4,h5,h6{font-family:Crimson Text,Georgia,serif;font-weight:600;line-height:1.2;margin-bottom:1rem;color:#1e1e1e}h1{font-size:2.5rem}h2{font-size:2rem;border-bottom:1px solid #eaecef;padding-bottom:.5rem;margin-top:2rem}h3{font-size:1.5rem;margin-top:1.5rem}p{margin-bottom:1rem}a{color:#a51c30;text-decoration:none;transition:color .2s ease-in-out}a:hover{color:#d44a40;text-decoration:underline}header{background-color:#a51c30;color:#fff;padding:2.5rem 0;border-bottom:6px solid #8a1829;box-shadow:0 4px 12px rgba(0,0,0,.1)}header h1{font-size:2.7rem;margin-bottom:.7rem;color:#fff;font-weight:700;letter-spacing:-.5px;text-shadow:1px 1px 2px rgba(0,0,0,.2)}header p{font-size:1.3rem;font-weight:300;margin-bottom:0;opacity:.9}nav{background-color:#f8f8f8;border-bottom:1px solid #e3e3e3;box-shadow:0 2px 8px rgba(0,0,0,.07);position:relative;z-index:100}nav .container{display:flex;justify-content:center}nav ul{list-style:none;display:flex;flex-wrap:wrap;margin:0;padding:0}nav ul li{margin:0;position:relative}nav ul li a{display:block;color:#444;text-decoration:none;padding:1.2rem 1.8rem;font-weight:600;font-size:.95rem;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px;position:relative}nav ul li a:hover{color:#a51c30;background-color:#f1f1f1;text-decoration:none}nav ul li a:after{content:"";position:absolute;width:0;height:3px;bottom:0;left:0;background-color:#a51c30;transition:width .3s ease}nav ul li a:hover:after{width:100%}main{padding:2.5rem 0;min-height:70vh}.intro{text-align:center;margin-bottom:3.5rem;padding:2.5rem;background-color:#fff;border-radius:8px;box-shadow:0 3px 15px rgba(0,0,0,.08);position:relative;overflow:hidden}.intro:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,#a51c30,#d44a40)}.intro h2{color:#a51c30;margin-bottom:1.25rem;border-bottom:none;font-size:2.1rem;position:relative;display:inline-block}.intro p{font-size:1.15rem;max-width:800px;margin-left:auto;margin-right:auto;line-height:1.7}section{margin-bottom:3.5rem}section:last-child{margin-bottom:5rem}section h2{color:#a51c30;margin-bottom:2rem;text-align:center;font-size:1.9rem;position:relative}section h2:after{content:"";display:block;width:100px;height:3px;background:linear-gradient(90deg,#a51c30,#d44a40);margin:15px auto 0;border-radius:2px}.chapters{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.chapter-card{background-color:#fff;border-radius:8px;padding:1.75rem;height:100%;box-shadow:0 3px 10px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column;border-top:3px solid #a51c30}.chapter-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(0,0,0,.12)}.chapter-card h3{color:#a51c30;margin-top:0;margin-bottom:1.25rem;font-size:1.3rem;font-weight:600;border-bottom:1px solid #eee;padding-bottom:.85rem;position:relative}.resources{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:auto}.resource-item{background-color:#f9f9f9;padding:.75rem 1rem;border-radius:6px;border:1px solid #eee;flex-grow:1;text-align:center;min-width:calc(33.333% - .5rem);transition:all .3s ease;box-shadow:0 1px 3px rgba(0,0,0,.05)}.resource-item:hover{background-color:#f1f1f1;border-color:#ddd;transform:translateY(-2px);box-shadow:0 3px 8px rgba(0,0,0,.08)}.resource-item a{color:#444;text-decoration:none;display:block;font-size:.95rem;font-weight:500;position:relative;padding-right:10px}.resource-item a:after{content:"\2192";position:absolute;right:0;opacity:0;transition:all .3s ease}.resource-item:hover a{color:#a51c30}.resource-item:hover a:after{opacity:1;right:-10px}.resource-item a:hover{color:#a51c30}footer{background-color:#333;color:#fff;text-align:center;padding:2.5rem 0;box-shadow:0 -3px 10px rgba(0,0,0,.1)}footer,footer.auto-footer{position:relative;clear:both;margin-top:5rem}footer.auto-footer{background:#f7f7f7;padding:1.5rem 0;font-size:.95rem;color:#333;border-top:1px solid #e1e1e1;width:100%;box-shadow:0 -2px 10px rgba(0,0,0,.05)}footer.auto-footer:before{content:"";position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,#a51c30,#d44a40,#a51c30);opacity:.5}footer p{margin:.5rem 0;font-size:.9rem;opacity:.8}.back-to-top{position:fixed;bottom:25px;right:25px;background-color:#a51c30;color:#fff;width:50px;height:50px;border-radius:50%;display:flex;justify-content:center;align-items:center;text-decoration:none;transition:all .3s ease;box-shadow:0 3px 10px rgba(0,0,0,.2);z-index:1000;opacity:.8;transform:translateY(100px)}.back-to-top.visible{transform:translateY(0)}.back-to-top:hover{background-color:#8a1829;opacity:1;box-shadow:0 5px 15px rgba(0,0,0,.3);transform:translateY(-3px)}.footer-spacer{height:80px;clear:both;display:block;width:100%}@media (max-width:992px){.chapters{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}}@media (max-width:768px){header h1{font-size:2rem}nav ul{flex-direction:column;align-items:center}nav ul li{width:100%;text-align:center}nav ul li a{padding:.75rem}.chapters{grid-template-columns:1fr}}@media (max-width:480px){.container{width:95%}.intro{padding:1.5rem}.chapter-card{padding:1rem}.resource-item{min-width:calc(50% - .375rem)}}a.btn-devoir,button.btn-devoir{display:inline-block;padding:12px 20px;border-radius:8px;border:2px solid #a51c30;background:rgba(165,28,48,.05);color:#a51c30;font-weight:600;text-decoration:none;transition:all .3s ease;box-shadow:0 2px 5px rgba(165,28,48,.1);margin:10px 0;position:relative;overflow:hidden}a.btn-devoir:hover,button.btn-devoir:hover{transform:translateY(-2px);background:rgba(165,28,48,.1);box-shadow:0 4px 8px rgba(165,28,48,.15)}a.btn-devoir:before,button.btn-devoir:before{content:"";position:absolute;top:0;left:0;width:0;height:100%;background:rgba(165,28,48,.1);transition:width .3s ease;z-index:-1}a.btn-devoir:hover:before,button.btn-devoir:hover:before{width:100%}.semestre-switcher{display:flex;justify-content:center;gap:15px;margin:30px 0}.semestre-btn{padding:14px 25px;border-radius:30px;border:2px solid #a51c30;background:#fff;color:#a51c30;font-weight:700;cursor:pointer;transition:all .3s ease;box-shadow:0 2px 8px rgba(0,0,0,.1);outline:none;position:relative;overflow:hidden}.semestre-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,.15)}.semestre-btn:after{content:"";position:absolute;bottom:0;left:0;width:100%;height:0;background:rgba(165,28,48,.1);transition:height .3s ease;z-index:-1}.semestre-btn:hover:after{height:100%}.semestre-btn.active{background:#a51c30;color:#fff;box-shadow:0 3px 10px rgba(165,28,48,.3)}.semestre-section{display:none;margin-bottom:40px;animation:fadeIn .5s ease}.semestre-section.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.footer-social-links{text-align:center;margin:15px 0}.footer-social-links a{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:50%;color:#fff;font-size:1.2rem;margin:0 5px;transition:all .3s ease;text-decoration:none}.footer-social-links a:hover{transform:translateY(-3px);box-shadow:0 5px 15px rgba(0,0,0,.2)}.footer-social-links .facebook{background-color:#3b5998}.footer-social-links .youtube{background-color:red}.footer-social-links .instagram{background:linear-gradient(45deg,#f09433,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888)}.footer-social-links .tiktok{background:linear-gradient(45deg,#000,#25f4ee,#fe2c55)}.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:10px;z-index:1000;position:absolute;top:10px;right:15px;outline:none}.hamburger{display:block;width:25px;height:3px;margin:5px 0;background:#a51c30;transition:all .3s;border-radius:3px}.menu-toggle.active .hamburger:first-child{transform:rotate(45deg) translate(5px,5px)}.menu-toggle.active .hamburger:nth-child(2){opacity:0}.menu-toggle.active .hamburger:nth-child(3){transform:rotate(-45deg) translate(7px,-6px)}@media (max-width:768px){.resource-item:active{background-color:#f1f1f1;transform:scale(.98)}a:active{color:#d44a40}.back-to-top:active{background-color:#8a1829;transform:scale(.95)}.menu-toggle{display:block}nav .container{position:relative;padding-top:15px;padding-bottom:15px}nav ul{flex-direction:column;align-items:center;width:100%;max-height:0;overflow:hidden;transition:max-height .5s ease;margin-top:40px}nav ul.menu-open{max-height:500px}nav ul li{width:100%;text-align:center}nav ul li a{padding:12px;border-bottom:1px solid #eee}nav ul li:last-child a{border-bottom:none}body.menu-active{overflow:hidden}}@media (max-width:480px){.chapter-card{padding:1rem}.resource-item{min-width:calc(50% - .375rem);padding:.6rem .5rem}.resource-item a{font-size:.9rem}.back-to-top{width:40px;height:40px;bottom:20px;right:20px}.intro{padding:1.5rem}.intro,section{margin-bottom:2.5rem}header h1{font-size:1.9rem}header p{font-size:1.1rem}.intro h2{font-size:1.8rem}section h2{font-size:1.7rem}.chapter-card h3{font-size:1.2rem}}@media (max-width:320px){body{font-size:14px}.container{width:95%;padding:0 10px}header h1{font-size:1.7rem}header p{font-size:1rem}h2{font-size:1.5rem}h3{font-size:1.1rem}.chapter-card{padding:.75rem}.intro{padding:1.25rem}.semestre-btn{padding:10px 15px;font-size:.9rem}a.btn-devoir,button.btn-devoir{padding:8px 12px;font-size:.9rem}.semestre-switcher{gap:8px}.footer-social-links a{width:35px;height:35px;font-size:1rem;margin:0 3px}}@media (max-width:768px){body{font-display:swap}.btn-devoir,.resource-item a,nav ul li a{padding:12px 15px}nav ul.menu-open{background-color:#fff;box-shadow:0 5px 15px rgba(0,0,0,.1);border-radius:0 0 10px 10px}.chapter-card{padding:1.25rem;margin-bottom:1rem;transition:transform .2s ease}.chapter-card:active{transform:scale(.98)}.resources{flex-direction:column;gap:10px}.resource-item{width:100%;padding:12px 15px}header{padding:2rem 0}header h1{font-size:2rem;margin-bottom:.5rem}header p{font-size:1.1rem}.back-to-top{width:45px;height:45px;bottom:15px;right:15px}section{margin-bottom:2.5rem}section h2{font-size:1.7rem;margin-bottom:1.5rem}section h2:after{width:80px;margin:10px auto 0}.semestre-switcher{flex-wrap:wrap;gap:10px}.semestre-btn{padding:10px 16px;font-size:.95rem;flex-grow:1;min-width:120px}footer.auto-footer{padding:1.2rem 0;font-size:.9rem}.footer-social-links{margin:10px 0}}@media (max-width:480px){.container{width:92%;padding:0 10px}.intro{padding:1.25rem;margin-bottom:1.5rem}.intro h2{font-size:1.6rem}.intro p{font-size:1rem;line-height:1.5}section h2{font-size:1.5rem;margin-bottom:1.25rem}.chapter-card{padding:1rem}.chapter-card h3{font-size:1.2rem;margin-bottom:.75rem;padding-bottom:.6rem}a.btn-devoir,button.btn-devoir{width:100%;text-align:center;padding:12px 10px}img{max-width:100%;height:auto;display:block;margin:0 auto}.menu-toggle{top:12px;right:12px}}@media (max-width:380px){body{font-size:15px}header h1{font-size:1.6rem}header p{font-size:.95rem}.intro h2{font-size:1.4rem}.chapter-card h3{font-size:1.1rem}.resource-item a{font-size:.9rem}.intro{padding:1rem}.chapter-card{padding:.85rem}.footer-social-links a{width:35px;height:35px;font-size:1rem;margin:0 3px}}@media (max-width:768px){.back-to-top,.btn-devoir,.resource-item a,.semestre-btn,nav ul li a{min-height:44px}input,select,textarea{font-size:16px}}@media (max-width:768px) and (orientation:landscape){header{padding:1.5rem 0}nav ul.menu-open{max-height:80vh;overflow-y:auto}.chapters{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}.resource-item{min-width:auto}}.skeleton-loader{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s infinite;border-radius:4px;min-height:20px}@keyframes loading{0%{background-position:200% 0}to{background-position:-200% 0}}@media (max-width:768px){.back-to-top,.chapter-card,.resource-item,a.btn-devoir,button.btn-devoir{will-change:transform}}