:root{--bg-primary: #0a0a0f;--bg-secondary: #12121a;--bg-tertiary: #1a1a25;--bg-card: #16161f;--bg-card-hover: #1e1e2a;--text-primary: #ffffff;--text-secondary: #a0a0b0;--text-muted: #6b6b7b;--accent-primary: #3b82f6;--accent-secondary: #2563eb;--accent-gradient: linear-gradient(135deg, #3b82f6, #2563eb, #1d4ed8);--border-color: #2a2a3a;--border-hover: #3a3a4a;--success: #10b981;--warning: #f59e0b;--error: #ef4444;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .3);--shadow-md: 0 4px 12px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .5);--shadow-glow: 0 0 40px rgba(59, 130, 246, .3);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--transition: .3s ease;--transition-fast: .15s ease}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #ffffff;--bg-tertiary: #f1f5f9;--bg-card: #ffffff;--bg-card-hover: #f8fafc;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-hover: #cbd5e1;--shadow-sm: 0 2px 4px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 8px 24px rgba(0, 0, 0, .12);--shadow-glow: 0 0 40px rgba(59, 130, 246, .15)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:Segoe UI,-apple-system,BlinkMacSystemFont,Roboto,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;transition:background-color var(--transition),color var(--transition);overflow-x:hidden}a{color:inherit;text-decoration:none}ul{list-style:none}img{max-width:100%;height:auto}button{cursor:pointer;font-family:inherit}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:#0a0a0fcc;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-color);transition:background var(--transition)}[data-theme=light] .header{background:#ffffffe6}.nav{display:flex;align-items:center;justify-content:space-between;height:70px}.logo{display:flex;align-items:center;gap:10px;font-size:1.5rem;font-weight:700}.logo-icon{width:32px;height:32px;object-fit:contain}.logo-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.nav-links{display:flex;align-items:center;gap:8px}.nav-links a{padding:8px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:500;transition:all var(--transition-fast)}.nav-links a:hover,.nav-links a.active{color:var(--text-primary);background:var(--bg-tertiary)}.theme-toggle{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:none;border-radius:var(--radius-md);background:var(--bg-tertiary);font-size:1.2rem;transition:all var(--transition)}.theme-toggle:hover{background:var(--bg-card-hover);transform:scale(1.05)}.sun-icon{display:none}.moon-icon,[data-theme=light] .sun-icon{display:block}[data-theme=light] .moon-icon{display:none}.mobile-menu-btn{display:none;flex-direction:column;justify-content:center;gap:5px;width:44px;height:44px;padding:10px;border:none;border-radius:var(--radius-md);background:var(--bg-tertiary)}.mobile-menu-btn span{display:block;width:100%;height:2px;background:var(--text-primary);border-radius:2px;transition:all var(--transition)}.mobile-menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.mobile-menu-btn.active span:nth-child(2){opacity:0}.mobile-menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.mobile-menu{position:fixed;top:70px;left:0;right:0;background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:20px;transform:translateY(-100%);opacity:0;visibility:hidden;transition:all var(--transition);z-index:999}.mobile-menu.active{transform:translateY(0);opacity:1;visibility:visible}.mobile-nav-links{display:flex;flex-direction:column;gap:8px}.mobile-nav-links a{display:block;padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:500;transition:all var(--transition-fast)}.mobile-nav-links a:hover,.mobile-nav-links a.active{color:var(--text-primary);background:var(--bg-tertiary)}.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}.hero-bg{position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at top,rgba(59,130,246,.15),transparent 50%),radial-gradient(ellipse at bottom right,rgba(37,99,235,.1),transparent 50%);pointer-events:none}.hero-content{position:relative;text-align:center;max-width:800px;margin:0 auto}.hero-title{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.2;margin-bottom:20px}.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.125rem;color:var(--text-secondary);max-width:600px;margin:0 auto 40px}.platform-hero{min-height:60vh}.platform-header{display:flex;align-items:center;justify-content:center;gap:20px;margin-bottom:24px}.platform-header .platform-icon{width:80px;height:80px}.platform-header h1{font-size:clamp(1.75rem,4vw,2.5rem)}.download-box{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:24px;box-shadow:var(--shadow-lg),var(--shadow-glow);transition:all var(--transition)}.download-box:focus-within{border-color:var(--accent-primary);box-shadow:var(--shadow-lg),0 0 0 4px #3b82f61a}.download-form{display:flex;flex-direction:column;gap:12px}.input-wrapper{display:flex;gap:12px}.url-input{flex:1;padding:16px 20px;font-size:1rem;border:2px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);transition:all var(--transition)}.url-input:focus{outline:none;border-color:var(--accent-primary);background:var(--bg-primary)}.url-input::placeholder{color:var(--text-muted)}.download-btn{display:flex;align-items:center;gap:8px;padding:16px 32px;font-size:1rem;font-weight:600;color:#fff;background:var(--accent-gradient);border:none;border-radius:var(--radius-md);transition:all var(--transition)}.download-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 8px 20px #3b82f666}.download-btn:disabled{opacity:.7;cursor:not-allowed}.download-btn:active{transform:translateY(0)}.supported-text{font-size:.875rem;color:var(--text-muted)}.loading-state{display:none;flex-direction:column;align-items:center;gap:16px;padding:40px}.loading-state.active{display:flex}.spinner{width:48px;height:48px;border:4px solid var(--border-color);border-top-color:var(--accent-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.result-section{display:none;margin-top:24px;animation:fadeIn .3s ease}.result-section.active{display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.download-result-container{display:grid;grid-template-columns:400px 1fr;gap:24px;padding:24px;background:var(--bg-tertiary);border-radius:var(--radius-lg)}.video-info-card{background:var(--bg-card);border-radius:var(--radius-md);padding:16px;border:1px solid var(--border-color)}.video-thumbnail{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-sm);margin-bottom:16px;background:var(--bg-secondary)}.video-details{text-align:left}.video-title{font-size:1.125rem;font-weight:600;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.video-duration{color:var(--text-secondary);font-size:.875rem;font-weight:500}.download-options-panel{display:flex;flex-direction:column;gap:24px}.download-section{background:var(--bg-card);border-radius:var(--radius-md);padding:20px;border:1px solid var(--border-color)}.section-header{display:flex;align-items:center;gap:10px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--border-color)}.section-icon{font-size:1.25rem}.section-title{font-size:1.125rem;font-weight:600;margin:0}.options-list{display:flex;flex-direction:column;gap:12px}.download-option-row{display:flex;align-items:center;justify-content:space-between;padding:14px;background:var(--bg-tertiary);border-radius:var(--radius-sm);border:1px solid var(--border-color);transition:all var(--transition)}.download-option-row:hover{background:var(--bg-secondary);border-color:var(--border-hover)}.option-info{display:flex;align-items:center;gap:12px;flex:1}.format-badge{padding:6px 12px;font-size:.875rem;font-weight:700;border-radius:6px;color:#fff;min-width:60px;text-align:center}.format-mp3,.format-mp4{background:#f59e0b}.option-quality{font-size:.95rem;font-weight:600;color:var(--text-primary);min-width:80px}.option-size{font-size:.95rem;font-weight:500;color:var(--text-secondary);min-width:80px}.fast-badge{padding:4px 10px;font-size:.75rem;font-weight:600;background:#3b82f626;color:var(--accent-primary);border-radius:4px;border:1px solid var(--accent-primary)}.download-btn-green{display:flex;align-items:center;gap:8px;padding:10px 24px;font-size:.95rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#10b981,#059669);border:2px solid #10b981;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition);white-space:nowrap}.download-btn-green:hover:not(:disabled){background:linear-gradient(135deg,#059669,#047857);border-color:#059669;transform:translateY(-2px);box-shadow:0 4px 12px #10b98166}.download-btn-green:disabled{opacity:.6;cursor:not-allowed}.download-btn-green .btn-icon{font-size:1.1rem}.video-preview{display:flex;gap:16px;margin-bottom:20px}.video-preview img{width:160px;height:90px;object-fit:cover;border-radius:var(--radius-sm)}.video-info{flex:1;text-align:left}.video-info h3{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-info p{color:var(--text-secondary);font-size:.875rem}.quality-options{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}.quality-btn{padding:12px 24px;font-size:.875rem;font-weight:600;color:var(--text-primary);background:var(--bg-card);border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition)}.quality-btn:hover{border-color:var(--accent-primary);background:var(--bg-card-hover)}.quality-btn.primary{color:#fff;background:var(--accent-gradient);border-color:transparent}.quality-btn.primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #3b82f666}.error-message{display:none;align-items:center;gap:12px;margin-top:20px;padding:16px 20px;background:#ef44441a;border:1px solid rgba(239,68,68,.3);border-radius:var(--radius-md);color:var(--error)}.error-message.active{display:flex}.error-icon{font-size:1.25rem}.platform-features{margin-top:60px;padding:40px;background:var(--bg-tertiary);border-radius:var(--radius-xl)}.platform-features h3{text-align:center;margin-bottom:24px;font-size:1.25rem}.platform-features ul{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;list-style:none}.platform-features li{display:flex;align-items:center;gap:10px;padding:12px 16px;background:var(--bg-card);border-radius:var(--radius-md)}.features{padding:100px 0;background:var(--bg-secondary)}.section-title{text-align:center;font-size:clamp(1.75rem,4vw,2.5rem);font-weight:700;margin-bottom:60px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}.feature-card{padding:32px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);text-align:center;transition:all var(--transition)}.feature-card:hover{transform:translateY(-4px);border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.feature-icon{font-size:2.5rem;margin-bottom:16px}.feature-card h3{font-size:1.25rem;margin-bottom:12px}.feature-card p{color:var(--text-secondary)}.platforms{padding:100px 0}.platforms-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}.platform-card{display:flex;flex-direction:column;align-items:center;padding:40px 24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);text-align:center;transition:all var(--transition);cursor:pointer}.platform-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.platform-icon{width:64px;height:64px;margin-bottom:16px}.platform-icon svg{width:100%;height:100%}.platform-card h3{font-size:1.25rem;margin-bottom:8px}.platform-card p{color:var(--text-secondary);font-size:.875rem}.platform-card.youtube:hover{border-color:red}.platform-card.youtube .platform-icon{color:red}.platform-card.instagram:hover{border-color:#e4405f}.platform-card.instagram .platform-icon{color:#e4405f}.platform-card.twitter:hover{border-color:#1da1f2}.platform-card.twitter .platform-icon,[data-theme=light] .platform-card.twitter .platform-icon{color:#000}.platform-card.tiktok:hover{border-color:#00f2ea}.platform-card.tiktok .platform-icon{color:#ff0050}.cookie-section{padding:100px 0;background:var(--bg-secondary)}.cookie-content{max-width:700px;margin:0 auto}.cookie-info{text-align:center;margin-bottom:24px}.cookie-info p{color:var(--text-secondary);margin-bottom:20px}.btn-secondary{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;font-size:1rem;font-weight:600;color:var(--text-primary);background:var(--bg-tertiary);border:2px solid var(--border-color);border-radius:var(--radius-md);transition:all var(--transition)}.btn-secondary:hover{border-color:var(--accent-primary);background:var(--bg-card-hover)}.cookie-form{display:none;padding:24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);animation:fadeIn .3s ease}.cookie-form.active{display:block}.cookie-form h3{margin-bottom:16px;font-size:1.125rem}.cookie-steps{list-style:decimal;padding-left:24px;margin-bottom:20px;color:var(--text-secondary)}.cookie-steps li{margin-bottom:8px}.cookies-textarea{width:100%;padding:16px;font-family:Consolas,Monaco,monospace;font-size:.875rem;color:var(--text-primary);background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--radius-md);resize:vertical;transition:all var(--transition)}.cookies-textarea:focus{outline:none;border-color:var(--accent-primary)}.cookie-actions{display:flex;gap:12px;margin-top:16px}.btn-primary{flex:1;padding:12px 24px;font-size:1rem;font-weight:600;color:#fff;background:var(--accent-gradient);border:none;border-radius:var(--radius-md);transition:all var(--transition)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px #3b82f666}.btn-outline{flex:1;padding:12px 24px;font-size:1rem;font-weight:600;color:var(--text-primary);background:transparent;border:2px solid var(--border-color);border-radius:var(--radius-md);transition:all var(--transition)}.btn-outline:hover{border-color:var(--error);color:var(--error)}.cookie-note{margin-top:16px;padding:12px;font-size:.875rem;color:var(--warning);background:#f59e0b1a;border-radius:var(--radius-sm)}.how-it-works{padding:100px 0}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}.step-card{position:relative;padding:40px 32px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);text-align:center}.step-number{display:flex;align-items:center;justify-content:center;width:48px;height:48px;margin:0 auto 20px;font-size:1.25rem;font-weight:700;color:#fff;background:var(--accent-gradient);border-radius:50%}.step-card h3{font-size:1.25rem;margin-bottom:12px}.step-card p{color:var(--text-secondary)}.footer{padding:60px 0 30px;background:var(--bg-secondary);border-top:1px solid var(--border-color)}.footer-content{display:grid;grid-template-columns:2fr 1fr;gap:60px;margin-bottom:40px}.footer-brand p{margin-top:16px;color:var(--text-secondary);max-width:300px}.footer-links{display:flex;gap:60px}.footer-column h4{font-size:1rem;margin-bottom:16px}.footer-column ul{display:flex;flex-direction:column;gap:10px}.footer-column a{color:var(--text-secondary);transition:color var(--transition)}.footer-column a:hover{color:var(--accent-primary)}.footer-bottom{padding-top:30px;border-top:1px solid var(--border-color);text-align:center}.footer-bottom p{color:var(--text-muted);font-size:.875rem}.disclaimer{margin-top:8px;font-size:.75rem!important}.about-section{padding:120px 0 80px}.about-content{max-width:800px;margin:0 auto}.about-content h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:24px}.about-content h2{font-size:1.5rem;margin:40px 0 16px;padding-top:20px;border-top:1px solid var(--border-color)}.about-content p{color:var(--text-secondary);margin-bottom:16px;line-height:1.8}.about-content ul{list-style:disc;padding-left:24px;color:var(--text-secondary);margin-bottom:16px}.about-content li{margin-bottom:8px}.toast{position:fixed;bottom:20px;right:20px;display:flex;align-items:center;gap:12px;padding:16px 24px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);transform:translateY(100px);opacity:0;transition:all var(--transition);z-index:2000}.toast.active{transform:translateY(0);opacity:1}.toast.success{border-color:var(--success)}.toast.error{border-color:var(--error)}.toast-icon{font-size:1.25rem}.toast.success .toast-icon{color:var(--success)}.toast.error .toast-icon{color:var(--error)}@media (max-width: 968px){.nav-links{display:none}.mobile-menu-btn{display:flex}.footer-content{grid-template-columns:1fr;gap:40px}.footer-links{justify-content:flex-start}}@media (max-width: 968px){.download-result-container{grid-template-columns:1fr}.video-info-card{max-width:600px;margin:0 auto}}@media (max-width: 768px){.hero{padding:100px 0 60px}.hero-title{font-size:2rem}.input-wrapper{flex-direction:column}.download-btn{width:100%;justify-content:center}.video-preview{flex-direction:column;align-items:center;text-align:center}.video-preview img{width:100%;max-width:300px;height:auto;aspect-ratio:16/9}.video-info{text-align:center}.download-result-container{padding:16px}.download-option-row{flex-direction:column;align-items:stretch;gap:12px}.option-info{flex-wrap:wrap}.download-btn-green{width:100%;justify-content:center}.features,.platforms,.cookie-section,.how-it-works{padding:60px 0}.platform-header{flex-direction:column;text-align:center}.platform-features ul{grid-template-columns:1fr}.footer-links{flex-direction:column;gap:30px}.cookie-actions{flex-direction:column}}@media (max-width: 480px){.container{padding:0 16px}.nav{height:60px}.logo{font-size:1.25rem}.logo-icon{font-size:1.5rem}.download-box{padding:16px}.url-input{padding:14px 16px}.section-title{margin-bottom:40px}.feature-card,.platform-card,.step-card{padding:24px}}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-secondary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--border-hover)}::selection{background:var(--accent-primary);color:#fff}