body {
            background: #111;
            color: white;
        }

        .player {
            max-width: 700px;
            margin: auto;
            background: #181818;
            border-radius: 10px;
            overflow: hidden;
        }

        .cover {
            width: 100%;
        }

        .track-info {
            padding: 20px;
        }

        #trackArtist {
            color: #aaa;
        }

        #trackAlbum {
            color: #777;
        }

        .controls {
            text-align: center;
            padding: 10px;
        }

        .btn-xl {
        font-size: 24px;
        padding: 16px 32px;
        }

        .btn-xxl {
        font-size: 34px;
        padding: 16px 32px;
        }

        .playlist {
            border-top: 1px solid #333;
        }

        .playlist-track {
            padding: 12px 15px;
            border-bottom: 1px solid #292929;
            cursor: pointer;
        }

        .playlist-track:hover {
            background: #252525;
        }

        .playlist-track.active {
            background: #001535;
        }