:root{--primary-color:#7160e8;--secondary-color:#26dde6;--success-color:#00d084;--danger-color:#fe2c55;--warning-color:#ffc107;--dark-color:#161823;--light-color:#fff;--gray-color:#8a8b9c;--border-color:#e1e1e1;--background-color:#f8f9fa;--shadow:0 4px 15px rgba(0,0,0,0.1);--border-radius:12px;--transition:all 0.3s ease;--header-height:80px}[data-theme=dark]{--light-color:#161823;--dark-color:#fff;--background-color:#0f0f0f;--border-color:#333;--gray-color:#a8a8a8}[data-theme=dark] .paste-btn{background:var(--primary-color);color:var(--light-color)}[data-theme=dark] .paste-btn:hover{background:var(--secondary-color)}[data-theme=dark] .sticky-header{background:rgba(22,24,35,.95);border-bottom-color:#333}[data-theme=dark] .footer{background:linear-gradient(135deg,#0a0a0a,#161823);color:var(--dark-color)}[data-theme=dark] .footer-section h3{color:var(--secondary-color)}[data-theme=dark] .copyright,[data-theme=dark] .footer-links a,[data-theme=dark] .footer-section p,[data-theme=dark] .made-with{color:var(--gray-color)}[data-theme=dark] .footer-links a:hover{color:var(--secondary-color)}[data-theme=dark] .social-links a{background:hsla(0,0%,100%,.05);border-color:hsla(0,0%,100%,.1);color:var(--dark-color)}[data-theme=dark] .social-links a:hover{background:var(--secondary-color);color:var(--light-color)}[data-theme=dark] .footer-bottom{border-top-color:var(--border-color)}[data-theme=dark] .feature-tag{background:hsla(0,0%,100%,.05);border-color:hsla(0,0%,100%,.1);color:var(--gray-color)}[data-theme=dark] .feature-tag:hover{background:rgba(0,242,234,.2);border-color:var(--secondary-color);color:var(--dark-color)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--dark-color);background:var(--background-color);padding-top:var(--header-height);min-height:100vh;display:flex;flex-direction:column}.sticky-header,body{transition:var(--transition)}.sticky-header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:hsla(0,0%,100%,.95);backdrop-filter:blur(10px);box-shadow:0 2px 10px rgba(0,0,0,.1);z-index:1000;border-bottom:1px solid var(--border-color)}.sticky-header-content{max-width:1200px;margin:0 auto;padding:0 20px;height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.header-left{justify-content:flex-start}.header-left,.logo-section{display:flex;align-items:center}.logo-section{justify-content:center;gap:15px}.header-right{display:flex;align-items:center;justify-content:flex-end}.logo-img{height:40px;width:auto;object-fit:contain}.logo-text{font-size:1.3rem;font-weight:600;background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.container{max-width:800px;margin:0 auto;padding:20px}.header{text-align:center;margin-bottom:20px;position:relative;padding:15px 20px;background:linear-gradient(135deg,rgba(255,0,80,.03),rgba(0,242,234,.03));border-radius:20px;overflow:hidden}.header:before{top:-50%;left:-50%;background:radial-gradient(circle,rgba(255,0,80,.1) 0,transparent 70%);animation:pulse 15s ease-in-out infinite}.header:after,.header:before{content:"";position:absolute;width:200%;height:200%;pointer-events:none}.header:after{bottom:-50%;right:-50%;background:radial-gradient(circle,rgba(0,242,234,.1) 0,transparent 70%);animation:pulse 15s ease-in-out infinite reverse}@keyframes pulse{0%,to{transform:scale(1) rotate(0deg)}50%{transform:scale(1.2) rotate(180deg)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.floating-icon{position:absolute;opacity:.1;animation:float-random 20s ease-in-out infinite}.floating-icon:first-child{top:10%;left:10%;font-size:2rem;animation-delay:0s}.floating-icon:nth-child(2){top:20%;right:15%;font-size:1.5rem;animation-delay:5s}.floating-icon:nth-child(3){bottom:15%;left:20%;font-size:1.8rem;animation-delay:10s}.floating-icon:nth-child(4){bottom:25%;right:10%;font-size:2.2rem;animation-delay:15s}@keyframes float-random{0%,to{transform:translate(0) rotate(0deg)}25%{transform:translate(30px,-30px) rotate(90deg)}50%{transform:translate(-20px,20px) rotate(180deg)}75%{transform:translate(40px,10px) rotate(270deg)}}.theme-toggle{background:var(--primary-color);color:var(--light-color);border:none;border-radius:var(--border-radius);padding:8px 12px;cursor:pointer;font-size:16px;display:flex;align-items:center;gap:5px;transition:var(--transition);box-shadow:var(--shadow)}.theme-toggle:hover{transform:translateY(-2px);box-shadow:var(--shadow);background:var(--secondary-color)}h1{background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.version-badge{background:var(--secondary-color);color:var(--light-color);padding:4px 8px;border-radius:20px;font-size:.8rem;font-weight:700}.input-section{background:var(--light-color);border-radius:var(--border-radius);padding:30px;margin-bottom:30px;box-shadow:var(--shadow);border:1px solid var(--border-color)}.input-group{margin-bottom:20px}label{display:block;margin-bottom:8px;font-weight:600;color:var(--dark-color)}.input-container{position:relative;display:flex;align-items:center}input[type=url]{width:100%;padding:15px 60px 15px 15px;border:2px solid var(--border-color);border-radius:var(--border-radius);font-size:16px;transition:var(--transition);background:var(--background-color);color:var(--dark-color)}input[type=url]:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(255,0,80,.1)}.paste-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:var(--primary-color);color:var(--light-color);border:none;border-radius:8px;padding:8px 12px;font-size:12px;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:4px;z-index:10}.paste-btn:hover{background:var(--secondary-color);transform:translateY(-50%) scale(1.05)}.paste-btn:active{transform:translateY(-50%) scale(.95)}.paste-btn:disabled{background:var(--gray-color);cursor:not-allowed;opacity:.6}.paste-btn-icon{font-size:14px}.btn{background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));color:var(--light-color);border:none;padding:15px 30px;border-radius:var(--border-radius);font-size:16px;font-weight:600;cursor:pointer;transition:var(--transition);width:100%;display:flex;align-items:center;justify-content:center;gap:10px}.btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow)}.btn:disabled{opacity:.6;cursor:not-allowed}.loading{display:none;text-align:center;padding:20px;background:var(--light-color);border-radius:var(--border-radius);margin:20px 0;box-shadow:var(--shadow);border:1px solid var(--border-color)}.spinner{width:40px;height:40px;border-top:4px solid var(--border-color);border:4px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 15px}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}.alert{padding:15px 20px;border-radius:var(--border-radius);margin-bottom:20px;display:none;font-weight:500}.alert-error{background:rgba(254,44,85,.1);color:var(--danger-color);border:1px solid rgba(254,44,85,.2)}.alert-success{background:rgba(0,208,132,.1);color:var(--success-color);border:1px solid rgba(0,208,132,.2)}.video-info{display:none;background:var(--light-color);border-radius:var(--border-radius);padding:30px;margin-bottom:30px;box-shadow:var(--shadow);border:1px solid var(--border-color)}.video-info h3{display:flex;align-items:center;gap:10px;margin-bottom:20px;font-size:1.5rem;color:var(--dark-color)}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-bottom:25px}.info-item{display:flex;justify-content:space-between;align-items:center;padding:12px 15px;background:var(--background-color);border-radius:8px;border:1px solid var(--border-color)}.info-item strong{color:var(--gray-color);font-size:.9rem}.info-item span:last-child{color:var(--dark-color);font-weight:600}.thumbnail-section{margin:25px 0;padding:20px 0;border-top:1px solid var(--border-color);display:none}.thumbnail-section h4{margin-bottom:15px;color:var(--dark-color);font-size:1.2rem;display:flex;align-items:center;gap:8px}.thumbnail-container{display:flex;justify-content:center}.thumbnail-preview{position:relative;max-width:300px;width:100%;background:var(--background-color);border:2px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden;transition:var(--transition)}.thumbnail-preview:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:var(--primary-color)}.thumbnail-preview img{width:100%;height:auto;display:block;max-height:400px;object-fit:cover}.thumbnail-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;color:var(--gray-color);text-align:center}.thumbnail-placeholder span{font-size:3rem;margin-bottom:10px;opacity:.6}.thumbnail-placeholder p{margin:0;font-size:.9rem}.thumbnail-overlay{position:absolute;bottom:0;left:0;right:0;background:linear-gradient(transparent,rgba(0,0,0,.8));padding:20px 15px 15px;opacity:0;transition:var(--transition)}.thumbnail-preview:hover .thumbnail-overlay{opacity:1}.thumbnail-download-btn{background:hsla(0,0%,100%,.2);backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.3);color:#fff;padding:8px 16px;border-radius:20px;font-size:12px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:6px;transition:var(--transition);width:100%;justify-content:center}.thumbnail-download-btn:hover{background:hsla(0,0%,100%,.3);transform:translateY(-1px)}.thumbnail-error{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;color:var(--danger-color);text-align:center}.thumbnail-error span{font-size:3rem;margin-bottom:10px;opacity:.6}.thumbnail-error p{margin:0;font-size:.9rem}.download-section{margin-top:25px}.download-section h4{margin-bottom:15px;color:var(--dark-color);font-size:1.2rem}.format-buttons{display:grid;gap:10px;margin-bottom:20px}.format-btn{background:var(--light-color);border:2px solid var(--border-color);border-radius:var(--border-radius);padding:15px 20px;cursor:pointer;transition:var(--transition);text-align:left;display:flex;align-items:center;justify-content:space-between}.format-btn:hover{border-color:var(--primary-color);background:rgba(255,0,80,.05)}.format-btn.selected{border-color:var(--primary-color);background:rgba(255,0,80,.1)}.format-info{display:flex;flex-direction:column}.format-quality{font-weight:600;color:var(--dark-color);margin-bottom:4px}.format-type{font-size:.9rem;color:var(--gray-color);margin-bottom:4px}.format-size{font-size:.85rem;color:var(--primary-color);font-weight:600}.format-badge{background:var(--primary-color);color:var(--light-color);padding:4px 8px;border-radius:12px;font-size:.8rem;font-weight:600}.download-buttons{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin-top:20px}.download-btn{background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));color:var(--light-color);border:none;padding:15px 20px;border-radius:var(--border-radius);font-size:14px;font-weight:600;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center;gap:8px;flex-direction:column;min-height:60px}.download-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:var(--shadow)}.download-btn:disabled{opacity:.6;cursor:not-allowed}.download-btn small{font-size:11px;margin-top:2px;opacity:.9}.download-music{background:linear-gradient(45deg,var(--secondary-color),var(--success-color))}.how-to-guide{background:var(--light-color);border-radius:var(--border-radius);padding:40px 30px;margin:40px 0;box-shadow:var(--shadow);border:1px solid var(--border-color);position:relative;overflow:hidden}.how-to-guide:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color))}.how-to-guide h2{text-align:center;font-size:2.2rem;margin-bottom:20px;color:var(--dark-color);background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;justify-content:center;gap:10px}.guide-subtitle{text-align:center;color:var(--gray-color);font-size:1.1rem;margin-bottom:35px;line-height:1.6}.steps-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:25px;margin-bottom:35px}.step-card{background:var(--background-color);border-radius:15px;padding:25px;border:2px solid 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h2{font-size:1.8rem;margin-bottom:25px;color:var(--dark-color);background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center}.seo-text{color:var(--gray-color);line-height:1.7;font-size:1rem}.seo-text p{margin-bottom:20px;text-align:justify}.seo-text strong{color:var(--dark-color);font-weight:600}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:20px;margin:25px 0}.feature-item{background:var(--background-color);border-radius:10px;padding:20px;border:1px solid var(--border-color);transition:var(--transition)}.feature-item:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--primary-color)}.feature-item h4{color:var(--dark-color);margin-bottom:10px;font-size:1.1rem;display:flex;align-items:center;gap:8px}.feature-item p{color:var(--gray-color);font-size:.95rem;line-height:1.6;margin:0}.cta-section{background:linear-gradient(45deg,rgba(255,0,80,.1),rgba(0,242,234,.1));border-radius:var(--border-radius);padding:25px;text-align:center;margin-top:30px;border:1px solid var(--border-color)}.cta-text{font-size:1.1rem;font-weight:600;color:var(--dark-color);margin:0}.faq-section{background:var(--light-color);border-radius:var(--border-radius);padding:40px 30px;margin:40px 0;box-shadow:var(--shadow);border:1px solid var(--border-color)}.faq-section h2{text-align:center;font-size:2rem;margin-bottom:30px;color:var(--dark-color);background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.faq-container{max-width:700px;margin:0 auto}.faq-item{border-bottom:1px solid var(--border-color);margin-bottom:20px;padding-bottom:20px}.faq-item:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.faq-question{cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:15px 0;transition:var(--transition)}.faq-question:hover{color:var(--primary-color)}.faq-question h3{font-size:1.1rem;font-weight:600;color:var(--dark-color);margin:0;transition:var(--transition)}.faq-question:hover h3,.faq-toggle{color:var(--primary-color)}.faq-toggle{font-size:1.2rem;font-weight:700;transition:var(--transition);min-width:20px;text-align:center}.faq-answer{padding:0 0 15px;color:var(--gray-color);line-height:1.6;display:none;animation:fadeIn .3s ease-in}.faq-answer.active{display:block}.faq-answer p,.faq-answer ul{margin-bottom:10px}.faq-answer ul{margin-left:20px}.faq-answer li{margin-bottom:5px}.footer{background:linear-gradient(135deg,#7160e8,#26dde6);color:var(--light-color);padding:40px 0 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a{color:#fdfdfd;text-decoration:none;font-size:14px;transition:var(--transition);display:inline-flex;align-items:center;gap:8px}.footer-links a:hover{color:var(--secondary-color);transform:translateX(5px)}.social-links{display:flex;gap:15px;margin-top:15px}.social-links a{width:40px;height:40px;background:hsla(0,0%,100%,.1);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--light-color);transition:var(--transition);border:1px solid hsla(0,0%,100%,.1)}.social-links a:hover{background:var(--secondary-color);transform:translateY(-3px);box-shadow:0 5px 15px rgba(0,242,234,.3)}.footer-bottom{padding-top:30px;border-top:1px solid 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p{margin-bottom:5px}.fade-in{animation:fadeIn .5s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){:root{--header-height:80px}body{padding-top:var(--header-height)}.sticky-header{height:var(--header-height)}.sticky-header-content{padding:0 15px;grid-template-columns:auto 1fr auto;gap:10px}.header-left,.header-right{min-width:auto}.logo-img{height:35px}.logo-text{font-size:1.1rem}.theme-toggle{padding:6px 10px;font-size:14px}.container{padding:15px}h1{font-size:1.4rem}.download-buttons,.info-grid{grid-template-columns:1fr}.faq-section{padding:30px 20px}.faq-section h2{font-size:1.3rem}.faq-question h3{font-size:1rem;line-height:1.4}.seo-section{padding:25px 15px}.seo-section h2{font-size:1.3rem}.seo-text{font-size:.95rem}.features-grid{grid-template-columns:1fr}.feature-item{padding:15px}.cta-section{padding:20px 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.thumbnail-slide-overlay{opacity:1}.thumbnail-label{color:#fff;font-size:12px;font-weight:600;margin-bottom:8px;display:block}.thumbnail-download-individual{background:hsla(0,0%,100%,.2);backdrop-filter:blur(10px);border:1px solid hsla(0,0%,100%,.3);color:#fff;padding:6px 12px;border-radius:20px;font-size:11px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:5px;transition:var(--transition)}.thumbnail-download-individual:hover{background:hsla(0,0%,100%,.3);transform:translateY(-1px)}.slider-nav{position:absolute;top:50%;transform:translateY(-50%);background:rgba(0,0,0,.6);color:#fff;border:none;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);z-index:10}.slider-nav:hover{background:rgba(0,0,0,.8)}.slider-nav.prev{left:-20px}.slider-nav.next{right:-20px}.slider-nav:disabled{opacity:.3;cursor:not-allowed}.download-all-thumbnails{background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));color:#fff;border:none;padding:10px 20px;border-radius:25px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:8px;transition:var(--transition);margin:15px auto 0}.download-all-thumbnails:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.thumbnail-counter{text-align:center;margin-top:10px;color:var(--gray-color);font-size:.9rem}.thumbnail-loading-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:15px;margin-top:15px}.thumbnail-skeleton{background:var(--border-color);border-radius:var(--border-radius);height:200px;position:relative;overflow:hidden}.thumbnail-skeleton:after{content:"";position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,hsla(0,0%,100%,.2),transparent);animation:skeleton-loading 1.5s infinite}@keyframes skeleton-loading{to{left:100%}}@media (max-width:768px){.thumbnail-slide{flex:0 0 250px}.slider-nav{width:35px;height:35px;font-size:14px}.slider-nav.prev{left:5px}.slider-nav.next{right:5px}.thumbnail-download-individual{font-size:10px;padding:5px 10px}}[data-theme=dark] .thumbnail-slide{background:var(--dark-color);border-color:hsla(0,0%,100%,.1)}[data-theme=dark] .slider-nav{background:hsla(0,0%,100%,.1)}[data-theme=dark] .slider-nav:hover{background:hsla(0,0%,100%,.2)}