/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #1a1a2e;
  color: #eee;
  font-family: 'Segoe UI', Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.game-wrapper {
  text-align: center;
  padding: 20px;
}

h1 {
  font-size: 28px;
  margin-bottom: 10px;
  color: #e94560;
}

/* 计分板 */
.score-board {
  font-size: 22px;
  margin-bottom: 12px;
  color: #f5c842;
}

#score {
  font-weight: bold;
}

/* 游戏画布 */
#gameCanvas {
  display: block;
  margin: 0 auto;
  border: 3px solid #e94560;
  border-radius: 8px;
  background: #16213e;
  cursor: pointer;
}

/* 控制按钮 */
.controls {
  margin-top: 14px;
}

kbd {
  background: #333;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid #555;
  font-size: 16px;
}

#restartBtn {
  margin-top: 10px;
  padding: 10px 28px;
  font-size: 18px;
  background: #e94560;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}

#restartBtn:hover {
  background: #c73652;
}

#restartBtn.hidden {
  display: none;
}

/* 回首页 */
.back-link {
  display: inline-block;
  margin-top: 18px;
  color: #aaa;
  text-decoration: none;
  font-size: 14px;
}

.back-link:hover {
  color: #fff;
}