:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;padding:0;min-width:320px;min-height:100vh;width:100%;overflow-x:hidden}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media(prefers-color-scheme:light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}.app{min-height:100vh;background:linear-gradient(135deg,red,#c00,#8b0000);padding:40px 20px;display:flex;justify-content:center;align-items:center;position:relative;overflow:hidden}.app:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 1px,transparent 1px);background-size:50px 50px;animation:backgroundMove 20s linear infinite}@keyframes backgroundMove{0%{transform:translate(0)}to{transform:translate(50px,50px)}}.container{max-width:900px;width:100%;margin:0 auto;background:#fffffffa;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:30px;padding:50px 60px;box-shadow:0 30px 90px #0006,0 0 0 1px #ffffff1a;position:relative;z-index:1}.title{font-size:3.5rem;font-weight:900;background:linear-gradient(135deg,red,#c00,red);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-align:center;margin-bottom:15px;display:flex;align-items:center;justify-content:center;gap:20px;letter-spacing:-1px;animation:titleGlow 3s ease-in-out infinite}@keyframes titleGlow{0%,to{filter:drop-shadow(0 0 20px rgba(255,0,0,.3))}50%{filter:drop-shadow(0 0 30px rgba(255,0,0,.5))}}.icon{font-size:4rem;filter:drop-shadow(0 5px 15px rgba(255,0,0,.4));animation:iconBounce 2s ease-in-out infinite}@keyframes iconBounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.subtitle{text-align:center;color:#555;font-size:1.3rem;margin-bottom:50px;font-weight:600;letter-spacing:.5px}.input-group{display:flex;gap:15px;margin-bottom:30px}.url-input{flex:1;padding:20px 25px;font-size:1.1rem;border:3px solid #f0f0f0;border-radius:16px;transition:all .3s ease;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#fafafa}.url-input:focus{outline:none;border-color:red;box-shadow:0 0 0 4px #ff00001a;background:#fff}.url-input::placeholder{color:#aaa}.btn{padding:20px 40px;font-size:1.1rem;font-weight:700;border:none;border-radius:14px;cursor:pointer;transition:all .3s ease;white-space:nowrap;letter-spacing:.3px}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-info{background:linear-gradient(135deg,red,#c00);color:#fff;box-shadow:0 4px 15px #ff00004d}.btn-info:hover:not(:disabled){background:linear-gradient(135deg,#c00,#900);transform:translateY(-2px);box-shadow:0 8px 25px #f006}.btn-download{background:linear-gradient(135deg,red,#c00);color:#fff;width:100%;margin-top:25px;font-size:1.3rem;padding:22px 50px;box-shadow:0 8px 25px #f006;position:relative;overflow:hidden}.btn-download:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#fff3;transform:translate(-50%,-50%);transition:width .6s,height .6s}.btn-download:hover:not(:disabled):before{width:300px;height:300px}.btn-download:hover:not(:disabled){background:linear-gradient(135deg,#c00,#900);transform:translateY(-3px);box-shadow:0 12px 35px #ff000080}.error-message{background:linear-gradient(135deg,#fee,#fdd);color:#c33;padding:20px 28px;border-radius:14px;margin-bottom:25px;border-left:6px solid #c33;font-weight:600;font-size:1.05rem;box-shadow:0 4px 12px #cc333326}.success-message{background:linear-gradient(135deg,#d4edda,#c3e6cb);color:#155724;padding:20px 28px;border-radius:14px;margin-bottom:25px;border-left:6px solid #28a745;font-weight:600;font-size:1.05rem;box-shadow:0 4px 12px #28a74526;animation:slideIn .3s ease}.video-info{background:linear-gradient(135deg,#fff,#f8f9fa);border-radius:24px;padding:40px;margin-top:30px;animation:slideIn .5s ease;border:2px solid #f0f0f0;box-shadow:0 10px 40px #00000014}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.thumbnail{width:100%;height:auto;border-radius:20px;margin-bottom:25px;box-shadow:0 10px 30px #0003;display:block;transition:all .4s ease;border:3px solid #f0f0f0}.thumbnail:hover{transform:scale(1.03);box-shadow:0 15px 40px #f003;border-color:red}.info-details{margin-bottom:15px}.video-title{font-size:2rem;font-weight:700;color:#1a1a2e;margin-bottom:15px;line-height:1.5;letter-spacing:-.5px}.video-meta{display:flex;gap:30px;color:#555;font-size:1.1rem;font-weight:500}.video-meta span{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#fff,#fafafa);padding:12px 20px;border-radius:12px;box-shadow:0 4px 12px #0000001a;border:2px solid #f0f0f0;transition:all .3s ease}.video-meta span:hover{transform:translateY(-2px);box-shadow:0 6px 16px #ff000026;border-color:red}.instructions{margin-top:50px;padding-top:40px;border-top:3px solid #e0e0e0}.instructions h3{color:#1a1a2e;margin-bottom:20px;font-size:1.8rem;font-weight:700}.instructions ol{color:#555;line-height:2.2;padding-left:30px;font-size:1.1rem}.instructions li{margin-bottom:12px;font-weight:500}.instructions li::marker{color:red;font-weight:700;font-size:1.2rem}.note{margin-top:20px;padding:15px 20px;background:#fff3cd;border-left:4px solid #ffc107;border-radius:8px;color:#856404;font-size:.95rem;line-height:1.6}.note code{background:#0000001a;padding:2px 6px;border-radius:4px;font-family:Courier New,monospace;font-weight:600}@media(min-width:1024px){.container{padding:60px 80px}.title{font-size:4rem}.icon{font-size:5rem}}@media(max-width:768px){.container{padding:30px 25px;margin:10px}.title{font-size:2.2rem;flex-direction:column;gap:10px}.icon{font-size:3rem}.subtitle{font-size:1rem;margin-bottom:30px}.input-group{flex-direction:column}.btn{width:100%}.video-title{font-size:1.4rem}.video-meta{flex-direction:column;gap:10px}.instructions h3{font-size:1.4rem}.instructions ol{font-size:1rem;padding-left:20px}}