Music player hero expansion

<div class="hero-player" data-expanded="false">
  <div
    class="player-art"
    role="img"
    aria-label="Blue record artwork for Slow Orbit"
  ></div>
  <div class="player-title">
    <strong>Slow Orbit</strong><small>Studio North</small>
  </div>
  <button
    class="player-expand"
    type="button"
    aria-expanded="false"
    aria-label="Expand player"
  >
    <svg viewBox="0 0 24 24" aria-hidden="true"><path d="m6 14 6-6 6 6" /></svg>
  </button>
  <div class="player-details" aria-hidden="true">
    <div class="player-progress"><i></i></div>
    <div class="player-times"><span>1:24</span><span>3:42</span></div>
    <div class="player-caption">Now playing · Slow Orbit</div>
  </div>
</div>

<script>
  const player = document.querySelector('.hero-player');
  const button = player.querySelector('.player-expand');
  const details = player.querySelector('.player-details');
  function setExpanded(expanded) {
    player.dataset.expanded = String(expanded);
    button.setAttribute('aria-expanded', String(expanded));
    button.setAttribute(
      'aria-label',
      expanded ? 'Collapse player' : 'Expand player',
    );
    details.setAttribute('aria-hidden', String(!expanded));
  }
  button.addEventListener('click', () =>
    setExpanded(player.dataset.expanded !== 'true'),
  );
  player.addEventListener('keydown', (event) => {
    if (event.key === 'Escape') setExpanded(false);
  });
</script>

<style>
  .hero-player,
  .hero-player * {
    box-sizing: border-box;
  }
  .hero-player {
    position: relative;
    width: 280px;
    height: 76px;
    overflow: hidden;
    border: 1px solid var(--stage-grid, var(--line, #cbd0d7));
    border-radius: 16px;
    background: var(--stage-bg, var(--bg, #fafafa));
    color: var(--stage-ink, var(--ink, #252b34));
    font: 14px/1.4 system-ui;
    transition: height 500ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  .hero-player[data-expanded='true'] {
    height: 340px;
  }
  .player-art {
    position: absolute;
    left: 14px;
    top: 14px;
    width: 160px;
    height: 160px;
    border-radius: 12px;
    background: #185bcc;
    color: white;
    transform-origin: top left;
    transform: scale(0.3);
    transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
    display: grid;
    place-items: center;
    overflow: hidden;
  }
  .player-art::before {
    content: '';
    width: 108px;
    height: 108px;
    border: 18px solid #ffffffc9;
    border-radius: 50%;
  }
  .player-art::after {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: white;
  }
  .hero-player[data-expanded='true'] .player-art {
    transform: translate(45px, 10px) scale(1);
  }
  .player-title {
    position: absolute;
    top: 17px;
    left: 76px;
    transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  .player-title strong,
  .player-title small {
    display: block;
  }
  .player-title small {
    color: var(--stage-muted, var(--muted, #596170));
    font-size: 12px;
    margin-top: 3px;
  }
  .hero-player[data-expanded='true'] .player-title {
    transform: translate(-52px, 183px);
  }
  .player-expand {
    position: absolute;
    right: 8px;
    top: 15px;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    color: inherit;
    border-radius: 8px;
    cursor: pointer;
  }
  .player-expand svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    transition: transform 500ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  .hero-player[data-expanded='true'] .player-expand svg {
    transform: rotate(180deg);
  }
  .player-details {
    position: absolute;
    top: 258px;
    left: 24px;
    right: 24px;
    opacity: 0;
    transform: translateY(12px);
    transition:
      opacity 180ms ease-out,
      transform 300ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  .hero-player[data-expanded='true'] .player-details {
    opacity: 1;
    transform: none;
    transition-delay: 150ms;
  }
  .player-progress {
    height: 3px;
    background: var(--stage-grid, var(--line, #cbd0d7));
    border-radius: 2px;
  }
  .player-progress i {
    display: block;
    width: 38%;
    height: 100%;
    background: var(--stage-link, var(--brand-deep, #185bcc));
  }
  .player-times {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    margin-top: 7px;
    color: var(--stage-muted, var(--muted, #596170));
    font-variant-numeric: tabular-nums;
  }
  .player-caption {
    text-align: center;
    font-size: 12px;
    margin-top: 10px;
  }
  .player-expand:hover {
    background: color-mix(in srgb, currentColor 8%, transparent);
  }
  .player-expand:focus-visible {
    outline: 2px solid var(--stage-link, var(--brand-deep, #185bcc));
    outline-offset: -2px;
  }
  @media (prefers-reduced-motion: reduce) {
    .hero-player,
    .hero-player * {
      transition: none !important;
    }
  }
</style>