.player-app {
            max-width: 1300px;
            width: 100%;
            background: rgba(18, 24, 32, 0.75);
            border-radius: 2rem;
            box-shadow: 0 25px 45px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.05);
            overflow: hidden;
            transition: all 0.2s;
        }

        .top-player-core {
            background: #181a1b;
            border-radius: 1.8rem;
            padding: .0rem 1.0rem .0rem;
            backdrop-filter: blur(4px);
              display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1.2rem;
        }

        .track-info {
            flex: 2;
            min-width: 180px;
        }
        .track-info .now-playing-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: #8e9eff;
        }
        .track-info h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: white;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .track-info p {
            font-size: 0.8rem;
            color: #a3b3d8;
        }

        .player-controls {
            flex: 2;
            display: flex;
            flex-direction: column;
            gap: 0.7rem;

        }
        .control-buttons {
            display: flex;
            align-items: center;
            justify-content: center; padding:.2rem.0rem.0rem;
            gap: 1rem;
        }
        .ctrl-btn {
            background: #1e2538;
            border: none;
            width: 42px;padding:.2rem.0rem.0rem;
            height: 42px;
            border-radius: 60px;
            font-size: 1.5rem;
            color: white;
            cursor: pointer;
            transition: 0.1s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .ctrl-btn:hover {
            background: #2f3a55;
            transform: scale(1.02);
        }
        .ctrl-btn.play-pause {
            background: #4f46e5;
            width: 48px;
            height: 48px;
            font-size: 1.3rem;
        }
        .progress-area {
            display: flex;
            align-items:center;
            gap: 10px;
            font-size: 0.7rem;
            color: #b9c3e6;
        }
        input[type="range"] {
            height: 4px;width:75%;
            -webkit-appearance: none;
            background: #2d3448;
            border-radius: 5px;
        }
        input[type="range"]:focus {
            outline: none;
        }

        .volume-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #11161f;
            border-radius: 40px;
			
        }
        .volume-wrap span {
            font-size: 0.9rem;
        }

        .playlist-tabs {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            border-bottom: 1px solid rgba(255,255,255,0.1);
           justify-content: center;
			        }
 
        .playlist-tab {
    background: #1e2c32;
      border-radius:25px;
	padding: 0.4rem .7rem .4rem .5rem;
      font-weight: 700;
      font-size: 1rem;
      font-family: inherit;
      align-items: center;
      justify-content: center;
      gap: 10px;
      cursor: pointer;
      transition: 0.2s;
      color: #7955C2;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      border: 4px solid rgba(18, 24, 32, 0.75);
	  background: linear-gradient(125deg, #1e3b46, #0a2a33);
      border-right: 2px solid #559EC2;
        }

        .playlist-tab.active {
            background: #2d3a5e;
            color: white;
        }
		    .playlist-tab:hover {
      transform: translateY(-3px);
      filter: brightness(1.05);
      box-shadow: 0 12px 20px rgba(0, 0, 0, 0.3);
    }

        /* submenu-bar (horizontal secondary actions under playlist nav) */
        .submenu-bar {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            margin-top: 0.1rem;
            margin-bottom: 0.1rem;
            flex-wrap: wrap;
        }
        .submenu-btn {
            background: rgba(30, 38, 56, 0.8);
            border: none;
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.75rem;
            color: #cad2ff;
            cursor: pointer;
            transition: 0.1s;
        }
        .submenu-btn:hover {
            background: #3c456b;
            color: white;
        }

        /* tracks list container */
        .tracks-container {
            background: #0b0f17a0;
            border-radius: 1.4rem;
            overflow-y: auto;
        }
        .track-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.2rem .5rem;
            border-radius: 1rem;font-size: 0.9rem;
            margin-bottom: 2px;
            background: #11161f70;
            transition: 0.1s;
            cursor: pointer;
        }
        .track-item.active-track {
            background: #2d3566;
            border-left: 4px solid #818cf8;
        }
        .track-item:hover {
            background: #1e253e;
        }
        .track-name {
            font-weight: 500;
            color: #f0f3ff;
        }
        .track-duration {
            font-size: 0.7rem;
            color: #8d9ad0;
        }
        .empty-playlist {
            text-align: center;
            padding: .0rem;display:none;
            color: #7a85b0;
        }

        /* responsive */
        @media (max-width: 750px) {
            .top-player-core {
                flex-direction: column;
                align-items: stretch;
            }
            .player-controls {
                width: 100%;
            }