* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
            background: #000;
            color: #fff;
            line-height: 1.6;
            min-height: 100vh;
        }

        .container {
            max-width: 420px;
            margin: 0 auto;
            padding: 20px;
            min-height: 100vh;
        }

        .back-link {
            color: #fff;
            text-decoration: none;
            font-size: 14px;
            margin-bottom: 24px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 0;
            opacity: 0.8;
            transition: opacity 0.2s ease;
        }

        .back-link:hover {
            opacity: 1;
        }

        .header {
            text-align: center;
            margin-bottom: 40px;
        }

        .title-section {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .artifact-img {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: #222;
            border: 1px solid #333;
            object-fit: cover;
            transition: transform 0.2s ease;
        }

        .artifact-img:hover {
            transform: scale(1.1);
        }

        h1 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            text-align: center;
            flex: 1;
            min-width: 200px;
        }

        .subtitle {
            font-size: 14px;
            color: #888;
            line-height: 1.5;
            max-width: 320px;
            margin: 0 auto;
        }

        .guide-info {
            display: flex;
            gap: 12px;
            margin-bottom: 32px;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
        }

        .category-badge {
            background: #fff;
            color: #000;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.8px;
        }

        .track-count {
            color: #888;
            font-size: 13px;
            font-weight: 500;
        }

        .track-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .track-item {
            background: #111;
            border-radius: 16px;
            padding: 20px;
            border: 1px solid #222;
            transition: all 0.3s ease;
        }

        .track-item:hover {
            background: #1a1a1a;
            border-color: #333;
            transform: translateY(-2px);
        }

        .track-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .track-number {
            background: #fff;
            color: #000;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .track-title {
            flex: 1;
            margin: 0;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
        }

        .track-duration {
            font-size: 11px;
            padding: 4px 8px;
            border-radius: 12px;
            font-weight: 500;
        }

        .audio-player {
            margin-top: 16px;
        }

        .audio-player audio {
            width: 100%;
            height: 44px;
            border-radius: 8px;
        }

        /* Custom audio player styling */
        audio::-webkit-media-controls-panel {
            background-color: #222;
            border-radius: 8px;
        }

        audio::-webkit-media-controls-play-button,
        audio::-webkit-media-controls-pause-button {
            background-color: #fff;
            border-radius: 50%;
        }

        audio::-webkit-media-controls-timeline {
            border-radius: 4px;
        }

        audio::-webkit-media-controls-current-time-display,
        audio::-webkit-media-controls-time-remaining-display {
            color: #fff;
            font-size: 11px;
        }

        /* Responsive design */
        @media (min-width: 768px) {
            .container {
                max-width: 480px;
                padding: 32px;
            }

            h1 {
                font-size: 28px;
            }

            .subtitle {
                font-size: 15px;
            }

            .artifact-img {
                width: 48px;
                height: 48px;
            }

            .title-section {
                gap: 20px;
            }

            .track-item {
                padding: 24px;
            }

            .track-list {
                gap: 20px;
            }
        }

        @media (max-width: 400px) {
            .title-section {
                flex-direction: column;
                gap: 12px;
            }

            .artifact-img {
                width: 36px;
                height: 36px;
            }

            h1 {
                font-size: 20px;
            }
        }