/* 画面全体はスクロールさせない (iPhone のホーム画面アプリで部品が浮く対策) */
html, body { height: 100%; margin: 0; overflow: hidden; background: #8fd3ff; }
body { touch-action: none; -webkit-user-select: none; user-select: none; -webkit-touch-callout: none; }
#game { display: block; position: fixed; inset: 0; width: 100%; height: 100%; }
/* 縦向きのときだけ出す案内 */
#hint { display: none; position: fixed; left: 0; right: 0; top: calc(10px + env(safe-area-inset-top)); text-align: center;
  color: #fff; font: bold 16px sans-serif; text-shadow: 0 1px 3px rgba(0,0,0,.4); pointer-events: none; }
@media (orientation: portrait) { #hint { display: block; } }