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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, #0F0F23 0%, #1A1A2E 50%, #16213E 100%);
            min-height: 100vh;
            color: #FFFFFF;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 24px;
        }

        .header {
            text-align: center;
            margin-bottom: 32px;
        }

        .header h1 {
            font-size: 32px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: -0.5px;
        }

        .header p {
            font-size: 16px;
            color: #94A3B8;
            font-weight: 400;
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 24px;
            margin-bottom: 24px;
        }

        .drop-zone {
            background: rgba(255, 255, 255, 0.05);
            border: 2px dashed rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 48px 32px;
            text-align: center;
            transition: all 0.2s ease;
            backdrop-filter: blur(16px);
            position: relative;
            overflow: hidden;
        }

        .drop-zone::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .drop-zone.dragover {
            border-color: rgba(139, 92, 246, 0.5);
            background: rgba(139, 92, 246, 0.1);
            transform: scale(1.01);
        }

        .drop-zone.dragover::before {
            opacity: 1;
        }

        .drop-zone-content {
            position: relative;
            z-index: 1;
        }

        .drop-zone .upload-icon {
            width: 64px;
            height: 64px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 24px;
            backdrop-filter: blur(8px);
        }

        .drop-zone h2 {
            font-size: 20px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .drop-zone p {
            font-size: 14px;
            color: #94A3B8;
            margin-bottom: 24px;
        }

        .browse-btn {
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            color: #FFFFFF;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s ease;
            position: relative;
            overflow: hidden;
        }

        .browse-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .browse-btn:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 25px rgba(139, 92, 246, 0.3);
        }

        .browse-btn:hover::before {
            opacity: 1;
        }

        .playlist-container {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 12px;
            padding: 24px;
            backdrop-filter: blur(16px);
        }

        .playlist-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .playlist-header h3 {
            font-size: 18px;
            font-weight: 600;
            color: #FFFFFF;
            letter-spacing: -0.3px;
        }

        .song-count {
            background: rgba(255, 255, 255, 0.1);
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 500;
            color: #94A3B8;
        }

        .playlist {
            max-height: 400px;
            overflow-y: auto;
            scrollbar-width: thin;
            scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
        }

        .playlist::-webkit-scrollbar {
            width: 6px;
        }

        .playlist::-webkit-scrollbar-track {
            background: rgba(255, 255, 255, 0.05);
            border-radius: 3px;
        }

        .playlist::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, 0.2);
            border-radius: 3px;
        }

        .song-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 12px;
            margin-bottom: 8px;
            cursor: pointer;
            transition: all 0.2s ease;
            position: relative;
            overflow: hidden;
        }

        .song-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .song-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-1px);
        }

        .song-item:hover::before {
            opacity: 1;
        }

        .song-item.playing {
            background: rgba(139, 92, 246, 0.1);
            border-color: rgba(139, 92, 246, 0.3);
        }

        .song-item.playing::before {
            opacity: 1;
        }

        .song-info {
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
            z-index: 1;
        }

        .song-icon {
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            backdrop-filter: blur(8px);
            overflow: hidden;
        }

        .song-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .song-details {
            flex: 1;
            min-width: 0;
        }

        .song-title {
            font-weight: 500;
            font-size: 14px;
            color: #FFFFFF;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.2px;
        }

        .song-meta {
            font-size: 12px;
            color: #94A3B8;
            font-weight: 400;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .song-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .song-item:hover .song-actions {
            opacity: 1;
        }

        .action-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: #FFFFFF;
            width: 28px;
            height: 28px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 12px;
            transition: all 0.2s ease;
            backdrop-filter: blur(8px);
        }

        .action-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: scale(1.1);
        }

        .player-controls {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 28px;
            backdrop-filter: blur(16px);
            position: sticky;
            bottom: 24px;
        }

        .now-playing {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-bottom: 24px;
        }

        .album-art {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #FFFFFF;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }

        .album-art::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .album-art.playing::before {
            opacity: 1;
        }

        .track-info {
            flex: 1;
            min-width: 0;
        }

        .track-title {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: -0.2px;
        }

        .track-artist {
            color: #94A3B8;
            font-size: 14px;
            font-weight: 400;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .metadata-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: #FFFFFF;
            width: 36px;
            height: 36px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 14px;
            transition: all 0.2s ease;
            backdrop-filter: blur(8px);
        }

        .metadata-btn:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: scale(1.1);
        }

        .controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }

        .control-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: #FFFFFF;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 16px;
            transition: all 0.2s ease;
            backdrop-filter: blur(8px);
            position: relative;
            overflow: hidden;
        }

        .control-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .control-btn:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
        }

        .control-btn:hover::before {
            opacity: 1;
        }

        .control-btn:active {
            transform: translateY(0);
        }

        .control-btn.play-pause {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            font-size: 18px;
            box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
        }

        .control-btn.play-pause:hover {
            box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
        }

        .progress-container {
            margin-bottom: 20px;
        }

        .progress-bar {
            width: 100%;
            height: 6px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 3px;
            overflow: hidden;
            cursor: pointer;
            position: relative;
            transition: all 0.2s ease;
        }

        .progress-bar:hover {
            height: 8px;
            background: rgba(255, 255, 255, 0.15);
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #8B5CF6 0%, #3B82F6 100%);
            width: 0%;
            transition: width 0.1s ease;
            position: relative;
        }

        .progress-fill::after {
            content: '';
            position: absolute;
            top: 50%;
            right: 0;
            width: 14px;
            height: 14px;
            background: #FFFFFF;
            border-radius: 50%;
            transform: translate(50%, -50%);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            opacity: 0;
            transition: opacity 0.2s ease;
        }

        .progress-bar:hover .progress-fill::after {
            opacity: 1;
        }

        .time-display {
            display: flex;
            justify-content: space-between;
            font-size: 12px;
            color: #94A3B8;
            font-weight: 500;
            margin-top: 8px;
        }

        .volume-control {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .volume-icon {
            font-size: 16px;
            color: #94A3B8;
            width: 20px;
            text-align: center;
        }

        .volume-slider {
            flex: 1;
            height: 4px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 2px;
            outline: none;
            cursor: pointer;
            -webkit-appearance: none;
            appearance: none;
            transition: all 0.2s ease;
        }

        .volume-slider:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        .volume-slider::-webkit-slider-thumb {
            appearance: none;
            width: 14px;
            height: 14px;
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            transition: all 0.2s ease;
        }

        .volume-slider::-webkit-slider-thumb:hover {
            transform: scale(1.2);
        }

        .volume-slider::-moz-range-thumb {
            width: 14px;
            height: 14px;
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            border-radius: 50%;
            cursor: pointer;
            border: none;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
        }

        .empty-playlist {
            text-align: center;
            padding: 40px 20px;
            color: #94A3B8;
        }

        .empty-playlist p {
            font-size: 14px;
            font-weight: 400;
        }

        .file-input {
            display: none;
        }

        /* Modal para metadatos */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(8px);
            z-index: 1000;
        }

        .modal.show {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .modal-content {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 32px;
            max-width: 500px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            backdrop-filter: blur(16px);
            position: relative;
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }

        .modal-title {
            font-size: 20px;
            font-weight: 600;
            color: #FFFFFF;
        }

        .close-btn {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: #FFFFFF;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 16px;
            transition: all 0.2s ease;
        }

        .close-btn:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        .metadata-grid {
            display: grid;
            gap: 16px;
        }

        .metadata-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 16px;
        }

        .metadata-label {
            font-size: 12px;
            color: #94A3B8;
            font-weight: 500;
            margin-bottom: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .metadata-value {
            font-size: 14px;
            color: #FFFFFF;
            font-weight: 400;
            word-break: break-word;
        }

        @media (max-width: 768px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            
            .header h1 {
                font-size: 28px;
            }
            
            .drop-zone {
                padding: 32px 24px;
            }
            
            .container {
                padding: 16px;
            }

            .now-playing {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .modal-content {
                padding: 24px;
            }
        }

        /* Animaciones */
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulse {
            0%, 100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.05);
            }
        }

        .song-item {
            animation: fadeIn 0.3s ease forwards;
        }

        .album-art.playing {
            animation: pulse 2s ease-in-out infinite;
        }

        .song-item:nth-child(1) { animation-delay: 0.05s; }
        .song-item:nth-child(2) { animation-delay: 0.1s; }
        .song-item:nth-child(3) { animation-delay: 0.15s; }
        .song-item:nth-child(4) { animation-delay: 0.2s; }
        .song-item:nth-child(5) { animation-delay: 0.25s; }

        .album-art img,
        .metadata-album-art {
          width: 100%;
          height: 100%;
          object-fit: cover;
          border-radius: 8px;
        }

        .metadata-album-art {
          max-width: 150px;
          max-height: 150px;
        }