html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #1d160f;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
  -webkit-tap-highlight-color: transparent;
  touch-action: none;
  overscroll-behavior: none;
  -webkit-overflow-scrolling: auto;
}

body {
  position: fixed;
  inset: 0;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

canvas#game {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  cursor: crosshair;
  outline: none;
}

/* 用于读取 iOS/Android 刘海安全区（env(safe-area-inset-*)） */
#safe-probe {
  position: fixed;
  inset: 0;
  pointer-events: none;
  visibility: hidden;
  padding-top: env(safe-area-inset-top, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  padding-left: env(safe-area-inset-left, 0px);
}

/* QA 输出容器（不显示） */
#qa-errors,
#qa-out {
  position: absolute;
  left: -9999px;
  top: 0;
  width: 800px;
  white-space: pre-wrap;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 12px;
  color: #0f0;
  background: #000;
}