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: #10B981;--primary-dark: #059669;--secondary: #ec4899;--accent: #f59e0b;--text-dark: #0f172a;--text-light: #64748b;--bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);--glass: rgba(255, 255, 255, .75);--shadow-lg: 0 20px 40px rgba(16, 185, 129, .15);--shadow-md: 0 10px 25px rgba(0, 0, 0, .05);--radius-xl: 24px;--header-bg: rgba(255, 255, 255, .85);--header-shadow: 0 8px 32px rgba(0, 0, 0, .05);--card-bg: rgba(255, 255, 255, .85);--card-border: rgba(255, 255, 255, .6);--card-shadow: 0 8px 32px rgba(31, 38, 135, .07)}body.dark-mode{--text-dark: #f8fafc;--text-light: #94a3b8;--bg-gradient: linear-gradient(135deg, #0f172a 0%, #020617 100%);--glass: rgba(15, 23, 42, .75);--shadow-lg: 0 25px 60px rgba(0, 0, 0, .6);--shadow-md: 0 12px 30px rgba(0, 0, 0, .4);--header-bg: rgba(15, 23, 42, .85);--header-shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--card-bg: #1e293b;--card-border: #334155;--card-shadow: none;--text-main: #f8fafc;--text-body: #94a3b8;--surface: #1e293b;--surface-dark: #0f172a;--bg-card: #1e293b;--border-color: #334155;--glass-bg: #1e293b;--glass-border: #334155;--bg-color-light: linear-gradient(160deg, #0f172a 0%, #020617 100%);--accent-purple-light: rgba(16, 185, 129, .15)}*{margin:0;padding:0;box-sizing:border-box;scroll-behavior:smooth}body{background:var(--bg-gradient);color:var(--text-dark);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;overflow-x:hidden;line-height:1.7}a{text-decoration:none;color:inherit;transition:none}ul{list-style:none}header{background:var(--header-bg);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);padding:0 5%;display:flex;justify-content:space-between;align-items:center;box-shadow:var(--header-shadow);border-bottom:1px solid var(--card-border);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:none}nav ul li a:hover:after{width:100%}.nav-btn{background:linear-gradient(135deg,var(--primary),#10b981);color:#fff!important;padding:10px 22px;border-radius:999px;box-shadow:0 10px 25px #05966959}.nav-btn:hover{background:linear-gradient(135deg,var(--primary-dark),#9229a8)}.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}@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}}body.dark-mode{color:var(--text-dark, #f3f4f6)!important}body.dark-mode header.glass-header{background:var(--header-bg, rgba(20, 20, 30, .92))!important;border-bottom-color:#ffffff14!important}body.dark-mode .desktop-nav.active{background:var(--header-bg, rgba(20, 20, 30, .98))!important;border-top-color:#ffffff14!important}body.dark-mode .desktop-nav.active ul li a{color:var(--text-dark, #f3f4f6)!important;border-bottom-color:#ffffff14!important}body.dark-mode .lang-toggle-btn,body.dark-mode .lang-toggle-btn i{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .chapter-card{background:var(--surface, #1e1e2e)!important;border-color:#ffffff14!important;color:var(--text-dark, #f3f4f6)!important}body.dark-mode .chapter-card:hover{border-color:var(--primary)!important;background:#ffffff08!important}body.dark-mode .ch-name{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .feature-card{background:var(--bg-card, #161622)!important;border-color:#ffffff14!important}body.dark-mode .feature-card h2,body.dark-mode .feature-card h3{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .feature-card p{color:var(--text-light, #9ca3af)!important}body.dark-mode .sf,body.dark-mode .sf-bottom{border-top-color:#ffffff14!important}body.dark-mode .exercise-panel{background:#1a1a26!important;border-top-color:#ffffff14!important}body.dark-mode .toggle-icon,body.dark-mode .action-icon{background:#252538!important;border-color:#ffffff14!important}body.dark-mode .stats-bar{background:#14141ecc!important;border-top-color:#ffffff14!important;border-bottom-color:#ffffff14!important}body.dark-mode .stat-item{border-right-color:#ffffff14!important}body.dark-mode .stat-text strong{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .bc{background:var(--bg-card, #161622)!important;border-color:#ffffff14!important;color:var(--text-dark, #f3f4f6)!important}body.dark-mode .bc h3{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .bc p,body.dark-mode .bc-features span{color:var(--text-light, #9ca3af)!important}body.dark-mode .bc-badge{background:#ffffff14!important;color:var(--text-dark, #f3f4f6)!important;border-color:#ffffff1f!important}body.dark-mode .ca-card-desc{color:var(--text-light, #9ca3af)!important}body.dark-mode .ca-topic-card{background:var(--bg-card, #161622)!important;border-color:#ffffff14!important}body.dark-mode .ca-topic-card span{color:var(--text-dark, #f3f4f6)!important}body.dark-mode .exam-chip{background:#1a1a26cc!important;border-color:#ffffff14!important;color:var(--text-dark, #f3f4f6)!important}body.dark-mode .carousel-arrow{background:#1a1a2680!important;border-color:#ffffff14!important}body.path-lock .install-app-btn,body.path-lock #darkToggle{display:none!important}body.dark-mode .classes-section,body.dark-mode .competitive-section{background:transparent!important}