.game-shell {
  --game-ui-ink: var(--text);
  --game-ui-accent-ink: color-mix(in srgb, var(--accent) 24%, var(--game-ui-ink));
  --game-ui-muted: var(--text-soft);
  --game-ui-panel: var(--bg-soft);
  --game-ui-border: var(--border);
  --game-ui-inset: var(--bg);
  --game-ui-radius: 12px;
  --game-ui-heading: inherit;
  --game-ui-stage: color-mix(in srgb, var(--accent) 5%, var(--bg-soft));
  --game-ui-primary: color-mix(in srgb, var(--accent) 35%, #172a4c);
  --game-ui-primary-ink: #fff;
  --game-ui-focus: var(--game-ui-primary);
}
[data-theme="dark"] .game-shell { --game-ui-focus: var(--accent); }
.game-shell .game-head h1 { text-wrap: balance; }
.game-shell .arcade-turn { max-width: 100%; overflow-wrap: anywhere; }

:where(.game-ui-panel) {
  min-width: 0;
  padding: 14px;
  border: 1px solid var(--game-ui-border);
  border-radius: var(--game-ui-radius);
  background: var(--game-ui-panel);
  color: var(--game-ui-ink);
  overflow-wrap: anywhere;
}

:where(.game-ui-action, .setup-start-btn) {
  min-height: 44px;
  border: 1px solid var(--game-ui-primary);
  border-radius: var(--game-ui-radius);
  padding: 10px 16px;
  background: var(--game-ui-primary);
  color: var(--game-ui-primary-ink);
  font-family: inherit;
  font-weight: 800;
  line-height: 1.35;
  overflow-wrap: anywhere;
  cursor: pointer;
  transition: transform .15s ease, filter .15s ease;
}

.game-ui-action--secondary {
  border-color: var(--game-ui-border);
  background: var(--game-ui-panel);
  color: var(--game-ui-ink);
}

.game-ui-action:hover:not(:disabled) { filter: brightness(1.12); }
.game-ui-action:active:not(:disabled) { transform: translateY(1px); }
.game-ui-action:disabled { opacity: .5; cursor: not-allowed; }
.game-ui-action:focus-visible, .setup-start-btn:focus-visible {
  outline: 3px solid var(--game-ui-focus);
  outline-offset: 3px;
}
.game-shell :is(button, [role="button"], [tabindex]):focus-visible {
  outline: 3px solid #101222;
  outline-offset: 3px;
  box-shadow: 0 0 0 6px #fff;
}

@media (prefers-reduced-motion: reduce) {
  .game-ui-action { transition: none; }
}