:root {
            --primary: #1db954; /* Color acento */
            --bg-dark: #121212;
            --card-bg: rgba(255, 255, 255, 0.08);
            --text-main: #ffffff;
            --text-dim: #b3b3b3;
        }

        body {
            background-color: var(--bg-dark);
            color: var(--text-main);
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            margin: 0;
            /* Fondo con degradado sutil */
            background: radial-gradient(circle at top left, #1db95422, #121212 70%);
        }

        .player-card {
            background: var(--card-bg);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 30px;
            border-radius: 24px;
            width: 380px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.6);
			position: relative;
        }

        h1.main-title {
            font-size: 1.2rem;
            margin-bottom: 20px;
            font-weight: 300;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: 53EAFD;
            text-align: center;
        }

        .cover-wrapper {
            width: 100%;
            aspect-ratio: 1 / 1;
            margin-bottom: 20px;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.5);
        }

        #cover-art {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .track-info {
            text-align: center;
            margin-bottom: 20px;
        }

        #track-title {
            font-size: 1.5rem;
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        #artist-name {
            color: var(--text-dim);
            margin: 5px 0 0 0;
        }

        /* Controles de Progreso */
        .progress-area {
            margin-bottom: 20px;
        }

        #progress-bar {
            width: 100%;
            height: 5px;
            cursor: pointer;
            accent-color: var(--primary);
        }

        /* Botones de Control */
        .controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 25px;
            margin-bottom: 25px;
        }

        .controls button {
            background: none;
            border: none;
            color: white;
            cursor: pointer;
            transition: all 0.2s ease;
            font-size: 1.5rem;
        }

        .controls button:hover {
            color: var(--primary);
            transform: scale(1.1);
        }

        .play-btn {
            background: white !important;
            color: black !important;
            width: 60px;
            height: 60px;
            border-radius: 50% !important;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 1.2rem !important;
        }

        .play-btn:hover {
            transform: scale(1.05) !important;
            background: var(--primary) !important;
        }

        /* Playlist */
        .playlist {
            list-style: none;
            padding: 0;
            margin: 0;
            max-height: 180px;
            overflow-y: auto;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 15px;
        }

        .playlist li {
            padding: 12px 15px;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            transition: background 0.2s;
            font-size: 0.9rem;
            color: var(--text-dim);
        }

        .playlist li:hover {
            background: rgba(255, 255, 255, 0.05);
            color: white;
        }

        .playlist li.active {
            color: var(--primary);
            background: rgba(29, 185, 84, 0.1);
        }

        /* Scrollbar personalizada */
        .playlist::-webkit-scrollbar { width: 4px; }
        .playlist::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 10px; }

.back-btn {
    position: absolute; /* O 'fixed' si quieres que te siga al bajar */
    top: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: rgba(255, 255, 255, 0.1); /* Fondo semi-transparente */
    backdrop-filter: blur(10px); /* Desenfoque de fondo */
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50px; /* Forma de píldora */
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.back-btn:hover {
    background: rgba(29, 185, 84, 0.8); /* Se vuelve verde Spotify al tocarlo */
    transform: translateX(-5px);
}

/* Ajuste específico para móviles */
@media (max-width: 480px) {
    .back-btn {
        top: 15px;
        left: 15px;
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .back-btn span {
        display: none; /* En móviles pequeños ocultamos el texto y dejamos solo el icono */
    }
}