/* Glassmorphism Container */
    .music-container {
        background: rgba(255, 255, 255, 0.7);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 40px;
        border-radius: 24px;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.08), inset 0 0 0 1px rgba(255, 255, 255, 0.5);
        display: flex;
        flex-wrap: wrap;
        gap: 50px;
    }
    
    /* Player Side - Dark Mode Aesthetic */
    .player-box {
        flex: 1 1 320px;
        background: linear-gradient(160deg, #111827 0%, #1f2937 100%);
        border-radius: 20px;
        padding: 40px 30px;
        color: #f3f4f6;
        text-align: center;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
        position: relative;
        overflow: hidden;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    /* Subtle Glow */
    .player-box::before {
        content: '';
        position: absolute;
        top: -30%; left: -30%;
        width: 160%; height: 160%;
        background: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.15) 0%, rgba(0, 0, 0, 0) 60%);
        pointer-events: none;
    }
    
    .album-art {
        width: 200px;
        height: 200px;
        border-radius: 50%;
        object-fit: cover;
        margin: 0 auto 30px auto;
        border: 4px solid #1f2937;
        box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.5), 0 15px 35px rgba(0,0,0,0.5);
        animation: rotate 20s linear infinite;
        animation-play-state: paused;
        transition: box-shadow 0.3s ease;
    }
    
    .album-art.playing {
        animation-play-state: running;
        box-shadow: 0 0 0 2px #3b82f6, 0 15px 35px rgba(59, 130, 246, 0.3), 0 0 40px rgba(59, 130, 246, 0.2);
    }
    
    @keyframes rotate {
        100% { transform: rotate(360deg); }
    }
    
    .track-title {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 5px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        letter-spacing: -0.5px;
    }
    
    .track-artist {
        font-size: 13px;
        color: #9ca3af;
        margin-bottom: 30px;
        font-weight: 500;
    }
    
    .progress-container {
        background: rgba(255,255,255,0.1);
        border-radius: 10px;
        cursor: pointer;
        height: 6px;
        margin-bottom: 12px;
        position: relative;
        transition: height 0.2s ease;
    }
    
    .progress-container:hover {
        height: 8px;
    }
    
    .progress-bar {
        background: linear-gradient(90deg, #3b82f6, #8b5cf6);
        border-radius: 10px;
        height: 100%;
        width: 0%;
        transition: width 0.1s linear;
        position: relative;
        box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
    }
    
    .progress-bar::after {
        content: '';
        position: absolute;
        right: -6px;
        top: 50%;
        transform: translateY(-50%);
        width: 12px;
        height: 12px;
        background: #fff;
        border-radius: 50%;
        box-shadow: 0 0 10px rgba(0,0,0,0.5);
        opacity: 0;
        transition: opacity 0.2s ease, transform 0.2s ease;
    }
    
    .progress-container:hover .progress-bar::after {
        opacity: 1;
        transform: translateY(-50%) scale(1.2);
    }
    
    .time-info {
        display: flex;
        justify-content: space-between;
        font-size: 13px;
        color: #9ca3af;
        margin-bottom: 30px;
        font-weight: 500;
        font-variant-numeric: tabular-nums;
    }
    
    .controls {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 25px;
    }
    
    .controls button {
        background: transparent;
        border: none;
        color: #d1d5db;
        font-size: 16px;
        cursor: pointer;
        transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
        outline: none;
    }
    
    .controls button:hover {
        color: #fff;
        transform: scale(1.1);
        text-shadow: 0 0 10px rgba(255,255,255,0.3);
    }
    
    .controls button:active {
        transform: scale(0.95);
    }
    
    .controls .play-btn {
        font-size: 20px;
        width: 50px;
        height: 50px;
        background: linear-gradient(135deg, #3b82f6, #2563eb);
        color: white;
        border-radius: 8px; /* Square with slight rounding */
        display: flex;
        align-items: center;
        justify-content: center;
        padding-left: 3px; 
        box-shadow: 0 6px 12px rgba(37, 99, 235, 0.3), inset 0 2px 4px rgba(255,255,255,0.2);
        transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, background 0.4s ease;
    }
    
    .controls .play-btn.playing {
        padding-left: 0;
    }
    
    .controls .play-btn:hover {
        background: linear-gradient(135deg, #60a5fa, #3b82f6);
        box-shadow: -5px 12px 25px rgba(37, 99, 235, 0.5), inset 0 2px 4px rgba(255,255,255,0.4);
        text-shadow: none;
        /* 3D Rotate Effect */
        transform: perspective(400px) rotateY(-15deg) rotateX(10deg) scale(1.1);
    }

    /* Playlist Side */
    .playlist-box {
        flex: 1 1 400px;
        display: flex;
        flex-direction: column;
    }
    
    .playlist-header {
        font-size: 18px;
        font-weight: 700;
        color: #111827;
        margin-bottom: 5px;
        display: flex;
        align-items: center;
    }
    
    .playlist-header i {
        color: #3b82f6;
        background: rgba(59, 130, 246, 0.1);
        padding: 10px;
        border-radius: 12px;
        margin-right: 15px;
    }
    
    .playlist-desc {
        color: #6b7280;
        font-size: 13px;
        margin-bottom: 20px;
        padding-bottom: 15px;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .playlist {
        list-style: none;
        padding: 0;
        margin: 0;
        max-height: 480px;
        overflow-y: auto;
        padding-right: 5px;
    }
    
    .playlist li {
        display: flex;
        align-items: center;
        padding: 14px 18px;
        border-radius: 14px;
        cursor: pointer;
        transition: all 0.2s ease;
        margin-bottom: 8px;
        border: 1px solid transparent;
        background: transparent;
    }
    
    .playlist li:hover {
        background: rgba(255,255,255,0.8);
        box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        transform: translateY(-1px);
    }
    
    .playlist li.active {
        background: #fff;
        border-color: rgba(59, 130, 246, 0.2);
        box-shadow: 0 8px 20px rgba(59, 130, 246, 0.1);
    }
    
    .playlist li .song-idx {
        width: 30px;
        font-size: 13px;
        color: #9ca3af;
        font-weight: 600;
        position: relative;
    }
    
    /* Equalizer Animation for Active Song */
    .playlist li.active .song-idx {
        color: transparent;
    }
    
    .playlist li.active .song-idx::after {
        content: '';
        position: absolute;
        top: 50%; left: 10px;
        transform: translateY(-50%);
        width: 14px; height: 14px;
        background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%233b82f6"><rect x="3" y="10" width="4" height="10" rx="1"><animate attributeName="height" values="4;14;4" dur="1s" repeatCount="indefinite"/><animate attributeName="y" values="14;6;14" dur="1s" repeatCount="indefinite"/></rect><rect x="10" y="4" width="4" height="16" rx="1"><animate attributeName="height" values="8;16;8" dur="1.2s" repeatCount="indefinite"/><animate attributeName="y" values="10;4;10" dur="1.2s" repeatCount="indefinite"/></rect><rect x="17" y="10" width="4" height="10" rx="1"><animate attributeName="height" values="6;12;6" dur="0.8s" repeatCount="indefinite"/><animate attributeName="y" values="12;6;12" dur="0.8s" repeatCount="indefinite"/></rect></svg>') no-repeat center;
    }
    
    .playlist li .song-info {
        flex-grow: 1;
    }
    
    .playlist li .song-name {
        display: block;
        font-weight: 600;
        color: #1f2937;
        font-size: 13px;
        margin-bottom: 2px;
    }
    
    .playlist li.active .song-name {
        color: #3b82f6;
    }
    
    .playlist li .song-artist {
        display: block;
        font-size: 12px;
        color: #6b7280;
        font-weight: 500;
    }
    
    .playlist li .song-duration {
        font-size: 13px;
        color: #9ca3af;
        font-weight: 500;
        font-variant-numeric: tabular-nums;
        background: rgba(0,0,0,0.03);
        padding: 4px 8px;
        border-radius: 6px;
    }
    
    .playlist li.active .song-duration {
        color: #3b82f6;
        background: rgba(59, 130, 246, 0.1);
    }
    
    /* Custom Scrollbar for Playlist */
    .playlist::-webkit-scrollbar { 
        width: 6px; 
    }
    .playlist::-webkit-scrollbar-track { 
        background: rgba(0,0,0,0.02); 
        border-radius: 10px; 
    }
    .playlist::-webkit-scrollbar-thumb { 
        background: rgba(0,0,0,0.15); 
        border-radius: 10px; 
    }
    .playlist::-webkit-scrollbar-thumb:hover { 
        background: rgba(0,0,0,0.3); 
    }
    
    /* Pagination Styles */
    .playlist-pagination {
        display: flex;
        justify-content: center;
        gap: 8px;
        margin-top: 15px;
    }
    
    .playlist-pagination .page-btn {
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 6px;
        background: rgba(0,0,0,0.05);
        color: #6b7280;
        font-weight: 600;
        font-size: 13px;
        cursor: pointer;
        border: 1px solid transparent;
        transition: all 0.2s ease;
    }
    
    .playlist-pagination .page-btn:hover {
        background: rgba(0,0,0,0.1);
        color: #1f2937;
    }
    
    .playlist-pagination .page-btn.active {
        background: #3b82f6;
        color: #fff;
        box-shadow: 0 4px 10px rgba(59, 130, 246, 0.4);
    }