.sound-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-panel);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow);
}

.sound-toggle:hover {
  color: var(--text);
  border-color: var(--accent-warm);
  box-shadow: 0 0 0 3px var(--accent-warm-soft);
}

.sound-toggle-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.sound-settings-backdrop[hidden],
.sound-settings-panel[hidden] {
  display: none !important;
  pointer-events: none;
}

.sound-settings-backdrop {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: var(--overlay);
  backdrop-filter: blur(4px);
  pointer-events: auto;
}

.sound-settings-panel {
  position: fixed;
  z-index: 501;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(520px, calc(100vw - 1.5rem));
  max-height: min(85vh, 640px);
  display: flex;
  flex-direction: column;
  background: var(--bg-panel-solid);
  border: 1px solid var(--border-strong);
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  pointer-events: auto;
}

.sound-settings-header {
  position: relative;
  padding: 1.1rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sound-settings-header h2 {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.sound-settings-sub {
  font-size: 0.8rem;
  color: var(--text-dim);
  padding-right: 2rem;
  line-height: 1.4;
}

.sound-settings-close {
  position: absolute;
  top: 0.85rem;
  right: 0.85rem;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 8px;
  background: var(--btn-secondary-bg);
  color: var(--text-dim);
  font-size: 1rem;
  cursor: pointer;
  line-height: 1;
}

.sound-settings-close:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.sound-compat-block {
  margin-bottom: 1.25rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--border);
}

.sound-compat-toggle {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text);
}

.sound-compat-toggle input {
  width: 1.1rem;
  height: 1.1rem;
  margin-top: 0.15rem;
  accent-color: var(--accent-strong);
}

.sound-compat-hint {
  margin: 0.5rem 0 0 1.75rem;
  font-size: 0.8rem;
  line-height: 1.45;
  color: var(--text-muted);
}

.sound-settings-dimmed {
  opacity: 0.45;
  pointer-events: none;
}

.sound-settings-body {
  padding: 0.85rem 1rem 1.1rem;
  overflow-y: auto;
}

.sound-settings-group {
  margin-bottom: 1rem;
}

.sound-settings-group h4 {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
}

.sound-options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.sound-option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.15rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--btn-secondary-bg);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.sound-option:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.sound-option.active {
  border-color: var(--accent-warm);
  background: var(--accent-warm-soft);
  box-shadow: 0 0 0 2px var(--accent-warm-soft);
}

.sound-option-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.sound-option-name {
  font-size: 0.82rem;
  font-weight: 800;
}

.sound-option-desc {
  font-size: 0.65rem;
  color: var(--text-dim);
  line-height: 1.35;
}

body.sound-settings-open {
  overflow: hidden;
}

@media (max-width: 520px) {
  .sound-options-grid {
    grid-template-columns: 1fr;
  }
  .sound-toggle-label,
  .theme-label,
  .piano-toggle-label {
    display: none;
  }
}