.container {
            max-width: 500px;
            width: 100%;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            overflow: hidden;
        }
        .header {
            background: linear-gradient(135deg, #ff6b6b, #ee5a24);
            color: white;
            padding: 30px;
            text-align: center;
        }
        .header h1 {
            font-size: 24px;
            margin-bottom: 10px;
        }
        .header p {
            opacity: 0.9;
            font-size: 14px;
        }
        .content {
            padding: 30px;
        }
        .form-group {
            margin-bottom: 25px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            font-weight: bold;
            color: #333;
        }
        input[type="url"] {
            width: 100%;
            padding: 15px;
            border: 2px solid #e1e5e9;
            border-radius: 8px;
            font-size: 16px;
            transition: all 0.3s ease;
        }
        input[type="url"]:focus {
            outline: none;
            border-color: #007bff;
            box-shadow: 0 0 0 3px rgba(0,123,255,0.1);
        }
        button {
            background: linear-gradient(135deg, #007bff, #0056b3);
            color: white;
            padding: 15px 40px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-size: 16px;
            font-weight: bold;
            transition: all 0.3s ease;
            width: 100%;
        }
        button:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0,123,255,0.3);
        }
        button:disabled {
            background: #6c757d;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }
        .result {
            margin-top: 25px;
            padding: 20px;
            border-radius: 8px;
            display: none;
            animation: fadeIn 0.5s ease;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .success {
            background: #d4edda;
            border: 1px solid #c3e6cb;
            color: #155724;
        }
        .error {
            background: #f8d7da;
            border: 1px solid #f5c6cb;
            color: #721c24;
        }
        .loading {
            background: #d1ecf1;
            border: 1px solid #bee5eb;
            color: #0c5460;
        }
        .download-buttons {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 20px;
        }
        .download-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 15px 20px;
            background: linear-gradient(135deg, #28a745, #20c997);
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: bold;
            font-size: 16px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            text-align: center;
        }
        .download-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(40,167,69,0.3);
            color: white;
            text-decoration: none;
        }
        .download-btn.cover {
            background: linear-gradient(135deg, #ff6b6b, #ee5a24);
        }
        .download-btn.cover:hover {
            box-shadow: 0 5px 15px rgba(255,107,107,0.3);
        }
        .btn-icon {
            margin-right: 10px;
            font-size: 18px;
        }
        .video-info {
            text-align: center;
            margin-bottom: 20px;
        }
        .video-title {
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 10px;
            color: #333;
        }
        .video-author {
            color: #666;
            font-size: 14px;
        }
        .download-status {
            margin-top: 10px;
            font-size: 12px;
            color: #666;
            text-align: center;
        }
        .video-preview {
            margin: 15px 0;
            text-align: center;
        }
        .video-preview video {
            max-width: 100%;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .cover-preview {
            margin: 15px 0;
            text-align: center;
        }
        .cover-preview img {
            max-width: 100%;
            max-height: 200px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }