:root{--primary-color: #007AFF;--background-color: #F5F5F5;--text-color: #333333;--light-text: #666666;--border-radius: 12px;--shadow: 0 2px 10px rgba(0, 0, 0, .1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background-color:var(--background-color);color:var(--text-color);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#app{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}.container{width:100%;max-width:400px;background-color:#fff;border-radius:var(--border-radius);box-shadow:var(--shadow);padding:30px 20px;text-align:center}h1{font-size:24px;font-weight:600;margin-bottom:20px;color:var(--primary-color)}button{background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);padding:15px 20px;font-size:16px;font-weight:600;cursor:pointer;width:100%;margin-top:20px;transition:background-color .3s ease}button:hover{background-color:#0056b3}button:disabled{background-color:#ccc;cursor:not-allowed}video{width:100%;height:auto;border-radius:var(--border-radius);margin:20px 0}.result{margin-top:20px;padding:15px;border-radius:var(--border-radius);font-weight:500}.result.success{background-color:#d4edda;color:#155724}.result.error{background-color:#f8d7da;color:#721c24}.loading{display:flex;align-items:center;justify-content:center;margin:20px 0}.loading:after{content:"";width:24px;height:24px;border:2px solid #f3f3f3;border-top:2px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.info{font-size:14px;color:var(--light-text);margin-top:10px}