:root {
  --bb-bg-1: rgba(15, 23, 42, 0.03);
  --bb-bg-2: rgba(255, 255, 255, 0);
}

.bbHud {
  margin: 10px 0 12px;
  border-radius: 16px;
  padding: 12px 12px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  background: linear-gradient(180deg, var(--bb-bg-1), var(--bb-bg-2));
  box-shadow: 0 10px 24px rgba(2, 6, 23, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.bbStatus {
  font-size: 13px;
  font-weight: 1000;
  color: rgba(15, 23, 42, 0.82);
}

.bbMeta {
  font-size: 12px;
  font-weight: 900;
  color: rgba(100, 116, 139, 0.95);
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.bbMeta #levelTap,
.bbMeta #lifeTap {
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 999px;
}
.bbMeta #levelTap:active,
.bbMeta #lifeTap:active {
  background: rgba(255, 255, 255, 0.16);
}
.bbSep {
  opacity: 0.7;
}

.bbStage {
  width: min(560px, 100%);
  /* 让小屏幕也能完整显示（高度更矮一些） */
  aspect-ratio: 3 / 3.55;
  margin: 0 auto;
  border-radius: 18px;
  border: 2px solid rgba(15, 23, 42, 0.12);
  box-shadow: var(--shadow-soft);
  background: rgba(255, 255, 255, 0.65);
  overflow: hidden;
  position: relative;
}

@media (max-height: 740px) {
  .bbStage {
    aspect-ratio: 3 / 3.35;
  }
}

@media (max-height: 680px) {
  .bbStage {
    aspect-ratio: 3 / 3.15;
  }
}

.bbCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.bbControls {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1.2fr 1fr;
  gap: 10px;
}

.bbControls2 {
  margin-top: 10px;
  display: none;
  justify-content: center;
}
.bbControls2.isOn {
  display: flex;
}
.bbControls2 .bbBtn {
  width: min(360px, 100%);
}

.bbBtn {
  appearance: none;
  border: 1px solid rgba(15, 23, 42, 0.12);
  background: rgba(255, 255, 255, 0.65);
  box-shadow: 0 10px 22px rgba(2, 6, 23, 0.06);
  border-radius: 999px;
  padding: 12px 14px;
  font-size: 18px;
  font-weight: 1000;
  color: rgba(15, 23, 42, 0.88);
  cursor: pointer;
  touch-action: manipulation;
  user-select: none;
  transition: transform 120ms ease, filter 120ms ease;
}
.bbBtnMid {
  font-size: 14px;
  font-weight: 1000;
}
.bbBtn:hover {
  filter: brightness(1.02);
}
.bbBtn:active {
  transform: scale(0.99);
}
.bbBtn.isFlash {
  filter: brightness(1.08);
  box-shadow: 0 14px 28px rgba(59, 130, 246, 0.18), 0 10px 22px rgba(2, 6, 23, 0.06);
  border-color: rgba(59, 130, 246, 0.35);
}

.bbStage:focus {
  outline: none;
}

/* cheat modal */
.bbCheatGrid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.bbCheatGrid .btn {
  width: 100%;
  padding: 10px 0;
  font-size: 14px;
}
.bbCheatTip {
  margin-top: 6px;
  font-size: 13px;
  color: rgba(100, 116, 139, 0.95);
  line-height: 1.5;
}

@media (max-width: 420px) {
  .bbControls {
    grid-template-columns: 1fr;
  }
  .bbBtn {
    width: 100%;
  }
  .bbControls2 {
    display: none;
  }
  .bbControls2.isOn {
    display: grid;
  }
}