/**
 * sound.css — Wave 10-A mute toggle styling.
 * Pixel-art button, fixed top-right, persists across all routes.
 */

#koro-mute-toggle {
  position: fixed;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1;
  color: var(--color-bg-deep);
  background: var(--color-pixel-cream);
  border: 2px solid var(--color-gold);
  border-radius: 0;
  cursor: pointer;
  z-index: var(--z-overlay);
  box-shadow: 0 3px 0 0 rgba(0, 0, 0, 0.35);
  transition: transform 120ms ease, background 120ms ease, box-shadow 200ms ease;
  user-select: none;
}

#koro-mute-toggle:hover {
  background: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 5px 0 0 rgba(0, 0, 0, 0.35);
}

#koro-mute-toggle:active {
  transform: translateY(1px);
  box-shadow: 0 2px 0 0 rgba(0, 0, 0, 0.35);
}

#koro-mute-toggle:focus-visible {
  outline: 2px solid var(--color-teal);
  outline-offset: 2px;
}

#koro-mute-toggle.mute-off {
  opacity: 0.65;
  background: var(--color-bg-deep);
  color: var(--color-pixel-cream);
  border-color: var(--color-pixel-cream);
}

#koro-mute-toggle.mute-off:hover {
  opacity: 1;
  background: var(--color-pixel-cream);
  color: var(--color-bg-deep);
}