@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";:root{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-accent: #334155;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-accent: #38bdf8;--primary: #38bdf8;--primary-hover: #0ea5e9;--secondary: #64748b;--border: #334155;--radius: .75rem;--nav-height: 4rem}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}button{font-family:inherit;cursor:pointer;border:none;background:none}img{max-width:100%;display:block}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:9999px;font-weight:600;transition:all 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#0009;z-index:10;flex-shrink:0}.device-frame-desktop:before{content:"";position:absolute;top:-8px;left:50%;transform:translate(-50%);width:6px;height:6px;background-color:#0f0f0f;border-radius:50%;z-index:20}.device-stand-desktop{position:absolute;bottom:-40px;left:50%;transform:translate(-50%);width:140px;height:40px;background:linear-gradient(180deg,#2a2a2a,#1a1a1a);border-bottom-left-radius:10px;border-bottom-right-radius:10px;z-index:5}.device-stand-desktop:after{content:"";position:absolute;bottom:0;left:-40px;width:220px;height:4px;background-color:#2a2a2a;border-radius:2px;box-shadow:0 5px 15px #0006}.device-frame-desktop,.device-frame-mobile{max-width:100%}.device-content-desktop{width:100%;height:100%;aspect-ratio:16/10;background-color:#000;overflow:hidden;border-radius:8px}.device-media{width:100%;height:100%;object-fit:cover;display:block}.device-glare{position:absolute;inset:0;background:linear-gradient(135deg,#ffffff0d,#fff0 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var(--sim-border)}.view-quiz{display:flex;flex-direction:column;align-items:center;justify-content:center}.quiz-card{background:var(--glass-surface);width:90%;max-width:400px;min-height:200px;padding:24px;border-radius:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;border:1px solid var(--sim-border);box-shadow:0 10px 30px #0000004d;position:relative}.quiz-option{margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%;max-width:400px}.option-btn{background:#1e293bcc;padding:12px;border-radius:8px;text-align:center;border:1px solid var(--sim-border);font-size:13px}.view-stats{display:flex;flex-direction:column;gap:24px}.stat-card{background:var(--glass-surface);border:1px solid var(--sim-border);border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:16px;width:100%}.view-settings{display:flex;flex-direction:column;gap:20px;max-width:600px}.setting-row{display:flex;justify-content:space-between;align-items:center;padding-bottom:16px;border-bottom:1px solid var(--sim-border)}.magic-cursor{position:absolute;top:0;left:0;pointer-events:none;z-index:9999;filter:drop-shadow(0 4px 6px rgba(0,0,0,.3))}.mobile-nav-bar{height:64px;flex:0 0 64px;background:#1e293b;border-top:1px solid var(--sim-border);display:flex;align-items:center;justify-content:space-around;z-index:20}.mobile-nav-item{display:flex;flex-direction:column;align-items:center;gap:4px;font-size:10px;color:var(--sim-text-mutated);transition:all .2s}.mobile-nav-item.active{color:var(--sim-primary)}.mobile-viewport{flex:1;position:relative;overflow:hidden;background:var(--sim-bg)}.mobile-view{position:absolute;inset:0;width:100%;height:100%;overflow-y:auto;padding:20px;scrollbar-width:none}.mobile-view::-webkit-scrollbar{display:none}.touch-ripple{position:absolute;width:40px;height:40px;border-radius:50%;background:#ffffff4d;border:2px solid rgba(255,255,255,.6);transform:translate(-50%,-50%);pointer-events:none;z-index:9999}.mobile-bottom-sheet{position:absolute;bottom:0;left:0;width:100%;background:#1e293b;border-radius:20px 20px 0 0;padding:24px;box-shadow:0 -10px 40px #00000080;border-top:1px solid rgba(255,255,255,.1);z-index:50}.features-section{padding:6rem 0}.features-header{text-align:center;margin-bottom:5rem}.features-header h2{font-size:2.5rem;margin-bottom:1rem}.features-header p{color:var(--text-secondary);font-size:1.25rem}.features-list{display:flex;flex-direction:column;gap:6rem}.feature-row{display:grid;grid-template-columns:1fr 1fr;gap:4rem;align-items:center}.feature-row.reverse{direction:rtl}.feature-row.reverse>*{direction:ltr}@media(max-width:900px){.feature-row,.feature-row.reverse{grid-template-columns:1fr;gap:2rem;direction:ltr}}.feature-content{max-width:480px}.feature-icon-wrapper{width:3.5rem;height:3.5rem;background:linear-gradient(135deg,#38bdf833,#38bdf80d);border-radius:1rem;display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:1.5rem}.feature-content h3{font-size:1.75rem;margin-bottom:1rem}.feature-content p{color:var(--text-secondary);font-size:1.1rem;line-height:1.7}.feature-demo-wrapper{display:flex;justify-content:center}.feature-demo{background:var(--bg-secondary);border:1px solid var(--border);border-radius:1rem;padding:2rem;min-height:280px;width:100%;max-width:420px;display:flex;flex-direction:column;justify-content:center;overflow:hidden}.demo-window{background:var(--bg-primary);border-radius:.75rem;overflow:hidden;border:1px solid var(--border)}.window-header{display:flex;align-items:center;gap:.75rem;padding:.75rem 1rem;background:var(--bg-accent);border-bottom:1px solid var(--border)}.window-dots{display:flex;gap:.4rem}.dot{width:10px;height:10px;border-radius:50%}.dot.red{background:#ef4444}.dot.yellow{background:#eab308}.dot.green{background:#22c55e}.window-title{font-size:.75rem;color:var(--text-secondary)}.pdf-content{padding:1.5rem;display:flex;flex-direction:column;gap:.75rem}.pdf-line{height:8px;background:linear-gradient(90deg,var(--border) 0%,transparent 100%);border-radius:4px}.pdf-line.short{width:75%}.pdf-line.medium{width:85%}.pdf-progress{margin-top:1rem;padding:.5rem 1rem;background:var(--bg-accent);border-radius:.5rem;font-size:.75rem;color:var(--text-secondary);text-align:center;transform-origin:left}.translation-demo{gap:1.5rem}.sentence-container{position:relative}.original-sentence{font-size:1.25rem;font-style:italic;color:var(--text-primary);line-height:2}.highlighted-word{padding:.25rem .5rem;border-radius:.25rem;cursor:pointer;display:inline-block}.translation-popup{position:absolute;top:2.5rem;left:50%;transform:translate(-50%);background:var(--bg-primary);border:1px solid var(--primary);border-radius:.75rem;padding:1rem 1.25rem;box-shadow:0 10px 40px #0000004d;z-index:10}.popup-arrow{position:absolute;top:-6px;left:50%;transform:translate(-50%) rotate(45deg);width:12px;height:12px;background:var(--bg-primary);border-left:1px solid var(--primary);border-top:1px solid var(--primary)}.popup-content{display:flex;flex-direction:column;gap:.25rem}.word-header{font-weight:700;font-size:1.1rem;color:var(--primary)}.word-type{font-size:.75rem;color:var(--text-secondary)}.word-translation{font-size:.9rem;color:var(--text-primary)}.context-translation{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--text-secondary);margin-top:1rem}.context-translation svg{color:var(--primary)}.flashcard-demo{align-items:center;gap:1.5rem}.flashcard-stack{width:100%;max-width:280px;height:160px;position:relative;perspective:1000px}.flashcard{position:absolute;inset:0;background:linear-gradient(145deg,var(--bg-primary) 0%,var(--bg-accent) 100%);border:1px solid var(--border);border-radius:1rem;display:flex;flex-direction:column;align-items:center;justify-content:center;backface-visibility:hidden;gap:.5rem}.flashcard.back{transform:rotateY(180deg);background:linear-gradient(145deg,var(--primary) 0%,#0ea5e9 100%);border:none}.flashcard.back .card-translation{color:#0f172a;font-weight:600;font-size:1.1rem}.card-word{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.card-hint{font-size:.75rem;color:var(--text-secondary)}.srs-indicators{width:100%;max-width:280px}.srs-bar{height:8px;background:var(--bg-accent);border-radius:4px;overflow:hidden;transform-origin:left}.srs-progress{height:100%;background:linear-gradient(90deg,var(--primary),#22c55e);border-radius:4px}.srs-label{display:block;margin-top:.5rem;font-size:.75rem;color:var(--text-secondary);text-align:right}.theming-demo{gap:1.5rem;align-items:center}.theme-preview{display:flex;gap:1rem;width:100%}.theme-card{flex:1;padding:1rem;border-radius:.75rem;display:flex;align-items:center;gap:.75rem;font-weight:500}.theme-card.dark{background:var(--bg-primary);border:1px solid var(--border);color:var(--text-primary)}.theme-card.light{background:#f1f5f9;color:#0f172a}.stats-preview{width:100%;background:var(--bg-primary);border:1px solid var(--border);border-radius:.75rem;padding:1.25rem;display:flex;flex-direction:column;gap:.75rem}.stats-preview svg{color:var(--primary)}.mini-bars{display:flex;align-items:flex-end;gap:.5rem;height:60px}.mini-bar{flex:1;background:linear-gradient(180deg,var(--primary) 0%,rgba(56,189,248,.3) 100%);border-radius:4px 4px 0 0}.stats-label{font-size:.75rem;color:var(--text-secondary)}.import-demo{align-items:center;justify-content:center;gap:2rem}.data-transfer-container{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.device-icon{display:flex;flex-direction:column;align-items:center;gap:.5rem;color:var(--text-secondary)}.device-icon svg{color:var(--primary)}.device-icon span{font-size:.75rem;font-weight:500}.transfer-path{position:relative;width:100px;height:2px;background:var(--bg-accent);border-radius:2px}.transfer-dot{position:absolute;top:50%;left:50%;width:8px;height:8px;background:var(--primary);border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 0 10px var(--primary)}.action-buttons{display:flex;gap:1rem}.action-btn{display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:var(--bg-accent);border:1px solid var(--border);border-radius:.5rem;font-size:.85rem;font-weight:500;cursor:pointer;transition:all .2s}.action-btn:hover{background:var(--bg-secondary);border-color:var(--primary);color:var(--primary)}.sync-demo{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2rem;padding:2rem}.devices-container{display:flex;align-items:center;gap:3rem;position:relative}.device-wrapper{position:relative;padding:1rem;background:#ffffff0d;border-radius:1rem;border:1px solid rgba(255,255,255,.1)}.device-wrapper.desktop{width:80px;height:60px;display:flex;align-items:center;justify-content:center}.device-wrapper.mobile{width:50px;height:80px;display:flex;align-items:center;justify-content:center}.device-icon{color:var(--text-secondary);z-index:2}.screen-glow{position:absolute;inset:4px;background:radial-gradient(circle,var(--text-primary) 0%,transparent 70%);border-radius:4px;z-index:1}.connection-path{position:relative;width:100px;height:2px;display:flex;align-items:center;justify-content:center}.line-path{position:absolute;top:50%;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--text-secondary),transparent);opacity:.3}.data-packet{position:absolute;width:6px;height:6px;background:var(--text-primary);border-radius:50%;box-shadow:0 0 10px var(--text-primary)}.wifi-signal{background:var(--bg-primary);padding:.5rem;border-radius:50%;border:1px solid rgba(255,255,255,.1);color:var(--text-primary);z-index:2}.sync-status-badge{display:flex;align-items:center;gap:.5rem;background:#4ade801a;padding:.5rem 1rem;border-radius:2rem;border:1px solid rgba(74,222,128,.2);font-size:.875rem;font-weight:500;color:var(--text-primary)}.navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background-color:#0f172acc;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:1000}.nav-container{display:flex;align-items:center;justify-content:space-between;height:100%}.nav-logo{font-size:1.5rem;font-weight:800;letter-spacing:-.02em}.text-accent{color:var(--primary)}.nav-links.desktop{display:none}@media(min-width:768px){.nav-links.desktop{display:flex;align-items:center;gap:2rem}}.nav-link{font-weight:500;color:var(--text-secondary);transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--text-primary)}.lang-toggle{display:flex;align-items:center;gap:.5rem;color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:color .2s;padding:.5rem}.lang-toggle:hover{color:var(--text-primary)}.nav-toggle{display:block;color:var(--text-primary)}@media(min-width:768px){.nav-toggle{display:none}}.mobile-menu{position:absolute;top:var(--nav-height);left:0;right:0;background-color:var(--bg-secondary);border-bottom:1px solid var(--border);padding:1rem;display:flex;flex-direction:column;gap:1rem;box-shadow:0 10px 30px #00000080;z-index:999}.mobile-link{font-weight:600;padding:.5rem;border-radius:var(--radius)}.mobile-link:hover{background-color:var(--bg-accent)}.mobile-link.highlight{color:var(--primary)}.btn-sm{padding:.5rem 1rem;font-size:.875rem}