html, body {
  margin: 0;
  height: 100%;
  background: #05060c;
  overflow: hidden;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#wrap {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game {
  display: block;
  width: min(100vw, calc(100dvh * 4 / 3));
  aspect-ratio: 4 / 3;
  height: auto;
  background: #000;
  image-rendering: pixelated;
}

/* スマホでは画面上部に寄せ、下に操作パッドを置く */
body.touch #wrap {
  align-items: flex-start;
  padding-top: env(safe-area-inset-top);
}

#touch[hidden] { display: none; }

#dpad {
  position: fixed;
  left: calc(20px + env(safe-area-inset-left));
  bottom: calc(24px + env(safe-area-inset-bottom));
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.25);
  touch-action: none;
}

#dpad .knob {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 48px;
  height: 48px;
  margin: -24px 0 0 -24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  pointer-events: none;
}

#buttons {
  position: fixed;
  right: calc(20px + env(safe-area-inset-right));
  bottom: calc(24px + env(safe-area-inset-bottom));
  display: flex;
  align-items: flex-end;
  gap: 16px;
}

#buttons button {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 200, 120, 0.2);
  color: #fff;
  font: 15px 'DotGothic16', sans-serif;
  touch-action: none;
}

#buttons button[data-action="attack"] {
  width: 84px;
  height: 84px;
  margin-bottom: 36px;
  background: rgba(255, 110, 70, 0.3);
}

#buttons button.on {
  background: rgba(255, 255, 255, 0.45);
}