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

html,
body {
  height: 100%;
}

body {
  background: #1a1c2c;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  overflow: hidden;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* 游戏容器:固定 400:600 比例,随视口缩放 */
.game-wrapper {
  position: relative;
  aspect-ratio: 400 / 600;
  width: min(100vw, calc(100vh * 400 / 600));
  max-height: 100vh;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

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

/* 遮罩层 */
.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  touch-action: none;
}

.overlay.hidden {
  display: none;
}

.panel {
  text-align: center;
  color: #fff;
  padding: 24px 28px;
  background: rgba(20, 22, 34, 0.85);
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.title {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #ffd93b;
}

.hint {
  margin: 14px 0 18px;
  font-size: 14px;
  color: #cbd0e0;
  line-height: 1.6;
}

.btn {
  background: #3ddc84;
  color: #0b3d21;
  border: none;
  font-size: 18px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn:hover {
  background: #2fbd72;
}

.btn:active {
  transform: scale(0.96);
}

.over-title {
  font-size: 28px;
  font-weight: 800;
  color: #ff6b6b;
}

.score-line,
.best-line {
  font-size: 18px;
  margin-top: 12px;
}

.score-line span {
  font-weight: 700;
  color: #ffd93b;
}

.best-line {
  color: #cbd0e0;
}

.new-best {
  color: #ffd93b;
  font-weight: 700;
  margin-top: 12px;
}

.new-best.hidden {
  display: none;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-top: 18px;
}

.btn-secondary {
  background: #5a6070;
  color: #fff;
}

.btn-secondary:hover {
  background: #4a4f5e;
}

/* 炸弹按钮 */
@keyframes bomb-glow {
  0%, 100% { box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45); }
  50% { box-shadow: 0 6px 28px rgba(255, 120, 60, 0.95); }
}

.bomb-btn {
  position: absolute;
  bottom: 26px;
  right: 22px;
  width: 68px;
  height: 68px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 159, 67, 0.95);
  font-size: 34px;
  cursor: pointer;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.45);
  z-index: 4;
  touch-action: manipulation;
  transition: transform 0.1s ease, background 0.15s ease;
  animation: bomb-glow 1.2s ease-in-out infinite;
}

.bomb-btn:hover {
  background: rgba(255, 143, 53, 0.95);
}

.bomb-btn:active {
  transform: scale(0.92);
}

.bomb-btn.hidden {
  display: none;
}

.bomb-btn span {
  display: block;
  line-height: 1;
}

.bomb-btn b {
  position: absolute;
  top: -6px;
  right: -6px;
  background: #ff6b6b;
  color: #fff;
  font-size: 15px;
  line-height: 1;
  border-radius: 11px;
  padding: 4px 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}