* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  margin: 0;
  background: #050914;
  color: #fff;
  font-family: sans-serif;
}

.game-page {
  width: min(100%, 430px);
  margin: 0 auto;
  padding: 10px;
  text-align: center;
}

h1 {
  margin: 6px 0;
  font-size: 1.4rem;
}

.lab-label,
.description {
  margin: 4px 0;
  color: #9eefff;
}

.status-panel {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 8px 0;
}

.status-panel div {
  padding: 8px;
  border-radius: 8px;
  background: #102844;
  font-weight: bold;
}

.canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
  aspect-ratio: 360 / 520;
  border: 2px solid #6df7ff;
  border-radius: 12px;
  overflow: hidden;
  background: #000;
}

#gameCanvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.message {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.58);
}

.message.hidden {
  display: none;
}

.message strong {
  font-size: 1.5rem;
}

.control-panel {
  max-width: 360px;
  margin: 10px auto 0;
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 8px;
}

.control-button {
  min-height: 46px;
  border: none;
  border-radius: 12px;
  background: #16518a;
  color: #fff;
  font-weight: bold;
  font-size: 1rem;
}

.control-button.main {
  background: #168a4f;
}

.control-button.danger {
  background: #8a1630;
}

.back-button {
  display: block;
  max-width: 360px;
  margin: 10px auto 0;
  padding: 10px;
  border-radius: 12px;
  background: #222;
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}

/* iOS Safariのダブルタップ拡大・長押しメニュー対策 */
html,
body,
.game-page,
.canvas-wrap,
.control-panel,
.control-button,
.back-button {
  touch-action: manipulation;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

button,
a {
  touch-action: manipulation;
}

.control-button {
  font-size: 16px;
}