body {
            font-family: sans-serif;
            padding: 20px;
            background: #f4f4f4;
            margin: 0;
        }
        #audioContainer {
            max-width: 600px;
            margin: auto;
            margin-bottom: 10px;
            background: #fff;
            border: 1px solid #ccc;
            padding: 15px;
            border-radius: 18px;
        }

        .controls {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .controls button {
            font-size: 20px;
            padding: 8px 12px;
            cursor: pointer;
        }

        .time {
            font-weight: bold;
            font-family: monospace;
        }

        .progressBar {
            position: relative;
            background: #ddd;
            height: 8px;
            border-radius: 4px;
            cursor: pointer;
            margin: 10px 0;
        }

        .progressFill {
            background: #4285f4;
            height: 100%;
            width: 0%;
            border-radius: 4px;
        }
        audio {
            width: 100%;
            margin-bottom: 20px;
        }
        .track {
            display: flex;
            gap: 10px;
            padding: 10px;
            border: 1px solid #ccc;
            background: #fff;
            margin-bottom: 8px;
            align-items: center;
            cursor: pointer;
            transition: background 0.2s;
            border-radius: 18px;
        }
        .track:hover {
            background: #eaeaea;
        }
        .active {
            background: #dcdcdc !important;
        }
        .cover {
            width: 60px;
            height: 60px;
            object-fit: cover;
            flex-shrink: 0;
            border-radius: 10px;
        }
        .cover-player {
            width: 72px;
            border-radius: 10px;
        }
        .info {
            flex-grow: 1;
        }
        .info strong {
            display: block;
            font-size: 1.1em;
        }
        .info small {
            color: #666;
        }

        @media (max-width: 600px) {
            .track {
                flex-direction: row;
                gap: 8px;
            }
            .cover {
                width: 48px;
                height: 48px;
            }

            .info strong {
                font-size: 1em;
            }
        }