html,body{max-width:100%;overflow-x:hidden}header,section,footer{width:100%}.features>*,.classes-section>*,footer>*{max-width:1200px;margin-left:auto;margin-right:auto;padding-left:1.5rem;padding-right:1.5rem}:root{--primary:#8e44ad;--primary-dark:#6c3483;--secondary:#e74c3c;--accent:#f39c12;--text-dark:#2c3e50;--text-light:#6b7280;--bg-gradient:linear-gradient(135deg,#fdfbfd 0%,#f4ecf7 100%);--glass:rgba(255,255,255,.9);--shadow-lg:0 25px 60px rgba(142,68,173,.18);--shadow-md:0 12px 30px rgba(142,68,173,.12);--radius-xl:28px}*{margin:0;padding:0;box-sizing:border-box;font-family:Poppins,sans-serif;scroll-behavior:smooth}body{background:var(--bg-gradient);color:var(--text-dark);overflow-x:hidden;line-height:1.7}a{text-decoration:none;color:inherit;transition:all .3s ease}ul{list-style:none}header{background:#fffffff5;backdrop-filter:blur(14px);padding:0 5%;display:flex;justify-content:space-between;align-items:center;box-shadow:0 6px 25px #0000000a;position:sticky;top:0;z-index:1000;height:80px}.logo{font-size:1.7rem;font-weight:800;background:linear-gradient(45deg,var(--primary),#c0392b);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;display:flex;align-items:center;gap:10px}.logo-symbol{font-size:1.5rem;color:var(--primary);-webkit-text-fill-color:initial}nav ul{display:flex;gap:2rem;align-items:center}nav ul li a{font-weight:500;font-size:.95rem;color:var(--text-dark);position:relative}nav ul li a:hover,nav ul li a.active{color:var(--primary)}nav ul li a:after{content:"";position:absolute;bottom:-6px;left:0;width:0;height:2px;background:var(--primary);transition:width .3s}nav ul li a:hover:after{width:100%}.nav-btn{background:linear-gradient(135deg,var(--primary),#b24ac7);color:#fff!important;padding:10px 22px;border-radius:999px;box-shadow:0 10px 25px #8e44ad59}.nav-btn:hover{background:linear-gradient(135deg,var(--primary-dark),#9229a8);transform:translateY(-2px)}.nav-btn:after{display:none}.mobile-toggle{display:none;font-size:1.6rem;color:var(--text-dark);cursor:pointer}footer{background:#0f0f0f;color:#ecf0f1;padding:5rem 0 2rem;margin-top:5rem}.footer-content{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:3rem;padding-bottom:3rem;border-bottom:1px solid #333}.footer-section h3{color:#fff;margin-bottom:1.5rem;font-size:1.1rem}.footer-links li{margin-bottom:12px}.footer-links a{color:#bbb;font-size:.92rem;transition:.3s}.footer-links a:hover{color:var(--primary);padding-left:6px}.footer-logo{display:flex;align-items:center;gap:10px;margin-bottom:1rem;font-size:1.7rem;font-weight:800;color:#fff}.footer-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:2rem;color:#777;font-size:.85rem;flex-wrap:wrap;gap:1rem}body.dark{background:#0b0b10;color:#e5e7eb}body.dark header{background:#14141ef2}body.dark section{background:transparent}body.dark .class-card,body.dark .feature-card,body.dark .big-card{background:#161622;color:#f3f4f6;box-shadow:0 20px 40px #0009}@media(max-width:992px){header{height:70px;padding:0 1.25rem}.mobile-toggle{display:block}nav{position:absolute;top:70px;left:0;width:100%;background:#fffffffa;backdrop-filter:blur(20px);padding:1.5rem 0;box-shadow:0 20px 40px #0000001a;display:none;flex-direction:column;align-items:center}nav.active{display:flex;animation:slideDownMenu .4s ease forwards}nav ul{flex-direction:column;gap:1.5rem}@keyframes slideDownMenu{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.footer-content{grid-template-columns:1fr 1fr;padding:0 1rem 3rem}.footer-bottom{padding:0 1rem;flex-direction:column;text-align:center}}@media(max-width:600px){.footer-content{grid-template-columns:1fr}}