: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;display:flex;place-items:center;min-width:320px;min-height:100vh}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{max-width:1200px;margin:0 auto;padding:20px}.video-player{width:100%;max-width:800px;margin-bottom:20px}.video-list{display:flex;flex-direction:column;gap:10px}.video-item{padding:12px;background:#f0f0f0;border-radius:4px;cursor:pointer;color:#000}.video-item:hover{background:#e0e0e0}.video-item.active{background:#007bff;color:#fff}.error{color:red}.reset-button{background-color:#f55;border:none;color:#fff;padding:10px 16px;font-size:14px;border-radius:6px;cursor:pointer;margin:10px 0}.reset-button:hover{background-color:#f77}