/* 游戏画面 */
#game-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

#game-canvas {
  display: block;
}

/* HUD 覆盖层 */
.game-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hud-quit {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  background: rgba(0,0,0,0.4);
  color: rgba(255,255,255,0.6);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  pointer-events: auto;
  transition: all 0.15s;
  z-index: 10;
}

.hud-quit:hover {
  background: rgba(255,68,68,0.6);
  color: #fff;
  border-color: rgba(255,68,68,0.8);
}

.hud-score {
  position: absolute;
  top: 20px;
  right: 30px;
  text-align: right;
}

.hud-score .score-value {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 2px;
}

.hud-score .accuracy {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.hud-combo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  transition: transform 0.1s ease;
}

.hud-combo .combo-value {
  font-family: var(--font-mono);
  font-size: 64px;
  font-weight: 700;
  color: var(--accent-gold);
  text-shadow: 0 0 20px rgba(255, 215, 0, 0.3);
}

.hud-combo .combo-label {
  font-size: 18px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 4px;
}

.hud-combo.pop {
  transform: translate(-50%, -50%) scale(1.2);
}

/* 进度条 */
.hud-progress {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
}

.hud-progress .progress-fill {
  height: 100%;
  background: var(--accent-blue);
  transition: width 0.1s linear;
}

/* 判定文字 */
.judgment-text {
  position: absolute;
  top: 65%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.judgment-text.show {
  opacity: 1;
}

.judgment-text.perfect { color: var(--accent-gold); text-shadow: 0 0 15px rgba(255,215,0,0.4); }
.judgment-text.good { color: var(--accent-blue); text-shadow: 0 0 15px rgba(74,158,255,0.4); }
.judgment-text.bad { color: var(--accent-red); text-shadow: 0 0 15px rgba(255,68,68,0.4); }
.judgment-text.miss { color: var(--text-secondary); }