#music-toggle {
  position: fixed;
  bottom: max(18px, env(safe-area-inset-bottom));
  right: 18px;
  z-index: 90;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid #777;
  border-radius: 0;
  background: #101010;
  color: #fff;
  font: 500 12px 'DM Mono', monospace;
  letter-spacing: .08em;
  cursor: pointer;
}
#music-toggle:hover { background: #fff; color: #000; }
#music-toggle:focus-visible { outline: 2px solid #fff; outline-offset: 4px; }