* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: #05070f;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Courier New", monospace;
}

.wrap {
  position: relative;
  text-align: center;
}

canvas {
  width: min(92vw, 72vh);
  height: auto;
  background: #0a0e1f;
  border: 3px solid #2a3a5f;
  border-radius: 6px;
}

.hint {
  color: #7f8db3;
  margin-top: 12px;
  font-size: 14px;
}

.hint-touch { display: none; }

/* 放雷按钮:仅触屏设备显示 */
.bomb-btn {
  display: none;
  position: absolute;
  right: 14px;
  bottom: 68px;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  font-size: 26px;
  color: #eee;
  background: rgba(60, 70, 95, 0.6);
  border: 2px solid #4a5a80;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.bomb-btn:active { background: rgba(120, 135, 175, 0.75); }

@media (pointer: coarse) {
  .bomb-btn { display: block; }
  .hint { display: none; }
  .hint-touch { display: block; }
  canvas { touch-action: none; }
}