.game-sound-controls {
  display: flex;
  justify-content: flex-end;
  grid-column: 1 / -1;
  margin: 0 0 12px;
}
.game-sound-controls .game-sound-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid #b8ccdf;
  border-radius: 999px;
  background: #e6eef6;
  color: #105698;
  font: 700 14px/1.4 Arial, sans-serif;
  cursor: pointer;
}
.game-sound-controls .game-sound-toggle:hover { background: #d4e4f3; }
.game-sound-controls .game-sound-toggle:focus-visible { outline: 3px solid #ec5f26; outline-offset: 3px; }
.game-sound-controls .game-sound-toggle:disabled { cursor: default; opacity: 1; }
body[data-page="play"] .site-header [data-game-sound] {
  display: flex;
  align-items: center;
}
.site-header [data-game-sound] .game-sound-controls { margin: 0; }
.site-header [data-game-sound] .game-sound-toggle {
  white-space: nowrap;
  border-color: #3b5969;
  background: #163343;
  color: #f1f8fc;
  box-shadow: 0 2px 0 #03121c;
}
.site-header [data-game-sound] .game-sound-toggle:hover:not(:disabled) {
  background: #274d60;
  border-color: #718f9d;
  color: #fff;
}
@media (max-width: 740px) {
  body[data-page="play"] .site-header { justify-content: space-between; gap: 16px; }
  body[data-page="play"] .site-header > .brand {
    position: static;
    transform: none;
    max-width: calc(100% - 60px);
  }
  body[data-page="play"] .site-header [data-game-sound] { position: static; margin-left: auto; }
  .site-header [data-game-sound] .game-sound-toggle {
    width: 44px;
    min-width: 44px;
    height: 44px;
    padding: 10px;
    gap: 0;
    font-size: 0;
  }
  .site-header [data-game-sound] .game-sound-toggle .fa-solid { font-size: 18px; }
}
.classroom-sound-panel { display:flex; align-items:center; justify-content:space-between; gap:20px; }
.classroom-sound-panel h2 { margin:0 0 6px; font-size:20px; }
.game-music-panel h2 { margin:0 0 12px; font-size:20px; }
.game-music-panel fieldset { border:0; padding:0; margin:0; min-width:0; }
.game-music-panel legend { padding:0; margin-bottom:10px; font-weight:800; }
.game-music-options { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; }
.game-music-options label { display:flex; align-items:center; gap:9px; margin:0; padding:13px 12px; border:2px solid #c6d8e4; border-radius:12px; background:#f7fbfd; cursor:pointer; font-weight:700; }
.game-music-options label:has(:checked) { border-color:#105698; background:#e7f2fb; color:#083e71; }
.game-music-options input { width:auto; margin:0; accent-color:#105698; }
.game-music-options label:has(:focus-visible) { outline:3px solid #105698; outline-offset:3px; }
.game-music-panel fieldset:disabled label { opacity:.6; cursor:default; }
@media(max-width:800px) { .game-music-options { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media(max-width:400px) { .game-music-options { grid-template-columns:1fr; } }
.classroom-sound-panel p { margin:4px 0 0; }
.classroom-sound-panel .button { flex-shrink:0; }
.classroom-sound-panel .button[aria-pressed="true"] { color:#8c1730; border-color:#d8a3ac; background:#fff0f3; }
@media(max-width:650px) { .classroom-sound-panel { align-items:stretch; flex-direction:column; gap:14px; } }