#layout {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

#bg-logo {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 200%;
    translate: -50% -50%;
    opacity: 1;
    pointer-events: none;
    animation: spin 20s linear infinite;
    animation-play-state: paused;
    z-index: -10;
}

#layout.playing #bg-logo {
    animation-play-state: running;
}

#player {
    flex: 0 1 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    min-width: 0;
}

#transport,
#track-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#transport {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
}

#btn-prev,
#btn-play-pause,
#btn-next,
#btn-rss {
    display: block;
    width: 30px;
    background: transparent;
}

#progress-bar {
    width: 100%;
    margin-top: 1rem;
}

#track-list {
    flex: 0 1 500px;
    overflow-y: auto;
    padding: 1rem;
    min-width: 0;
    text-align: right;
}

#track-list .track-item {
    margin-bottom: 20px;
}

#track-list .track-title,
#track-list .track-desc {
    margin: 0;
}

#track-list .track-desc {
    color: #999;
}