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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #04060f;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #cfe8ff;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

#stage {
  position: relative;
  width: 100vw;
  height: 100vh;
}

#game {
  position: absolute;
  inset: 0;
  display: block;
  touch-action: none;
}

.hidden { display: none !important; }

/* ---------- HUD ---------- */
#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

#hud-top {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 10px 16px;
  font-size: 15px;
}

.hud-block {
  min-width: 110px;
  background: rgba(8, 16, 38, 0.55);
  border: 1px solid rgba(80, 160, 255, 0.25);
  border-radius: 8px;
  padding: 6px 12px;
  backdrop-filter: blur(4px);
}

.hud-block.center { text-align: center; }
.hud-block.right { text-align: right; }

.hud-label {
  display: block;
  font-size: 11px;
  color: #6f9fd8;
  letter-spacing: 2px;
}

#score, #wave, #hiscore {
  font-size: 20px;
  font-weight: 700;
  color: #eaf6ff;
  text-shadow: 0 0 8px rgba(80, 180, 255, 0.8);
  font-variant-numeric: tabular-nums;
}

#hud-bottom {
  position: absolute;
  bottom: 10px;
  left: 16px;
  right: 16px;
  display: flex;
  gap: 12px;
  font-size: 14px;
}

.hud-group {
  background: rgba(8, 16, 38, 0.55);
  border: 1px solid rgba(80, 160, 255, 0.2);
  border-radius: 8px;
  padding: 4px 10px;
}

#lives { color: #ff5d6c; letter-spacing: 3px; text-shadow: 0 0 6px rgba(255, 90, 110, 0.8); }
#bombs { color: #ffd25d; letter-spacing: 3px; text-shadow: 0 0 6px rgba(255, 210, 90, 0.8); }
#weapon { color: #6cf2ff; letter-spacing: 3px; text-shadow: 0 0 6px rgba(108, 242, 255, 0.8); }

/* Boss 血条 */
#boss-bar {
  position: absolute;
  top: 64px;
  left: 50%;
  transform: translateX(-50%);
  width: min(70%, 420px);
  text-align: center;
}

#boss-name {
  font-size: 12px;
  letter-spacing: 3px;
  color: #ff8a9a;
}

.bar {
  margin-top: 4px;
  height: 10px;
  background: rgba(255, 60, 90, 0.15);
  border: 1px solid rgba(255, 90, 120, 0.5);
  border-radius: 5px;
  overflow: hidden;
}

#boss-hp {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, #ff3b5c, #ff8a5c);
  box-shadow: 0 0 10px rgba(255, 70, 100, 0.8);
  transition: width 0.15s ease-out;
}

/* ---------- 覆盖屏 ---------- */
.screen {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  text-align: center;
  background: radial-gradient(ellipse at center, rgba(6, 12, 30, 0.72) 0%, rgba(3, 6, 15, 0.92) 100%);
  padding: 24px;
}

h1 {
  font-size: clamp(42px, 9vw, 72px);
  letter-spacing: 12px;
  color: #eaf6ff;
  text-shadow: 0 0 18px rgba(80, 180, 255, 0.9), 0 0 46px rgba(60, 120, 255, 0.5);
}

.subtitle {
  letter-spacing: 8px;
  font-size: 15px;
  color: #6f9fd8;
  margin-top: -10px;
}

h2 {
  font-size: clamp(30px, 6vw, 44px);
  letter-spacing: 8px;
  text-shadow: 0 0 14px rgba(80, 180, 255, 0.8);
}

#screen-over h2 { color: #ff8a9a; text-shadow: 0 0 18px rgba(255, 90, 110, 0.8); }

#final-score {
  font-size: 22px;
  color: #eaf6ff;
  font-variant-numeric: tabular-nums;
}

#pad-status {
  font-size: 13px;
  color: #8fc7ff;
  background: rgba(8, 16, 38, 0.6);
  border: 1px solid rgba(80, 160, 255, 0.25);
  padding: 6px 14px;
  border-radius: 20px;
}

#pad-status.connected {
  color: #7dffb0;
  border-color: rgba(90, 255, 160, 0.4);
}

.controls-help {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
}

.ctl {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #a9cdf5;
}

.key {
  display: inline-block;
  min-width: 170px;
  background: rgba(20, 40, 80, 0.6);
  border: 1px solid rgba(100, 170, 255, 0.35);
  border-radius: 6px;
  padding: 4px 10px;
  color: #eaf6ff;
  font-size: 12px;
}

.btn {
  pointer-events: auto;
  font-size: 18px;
  letter-spacing: 4px;
  color: #061020;
  background: linear-gradient(180deg, #6cd8ff, #2f8dff);
  border: none;
  border-radius: 30px;
  padding: 13px 44px;
  cursor: pointer;
  box-shadow: 0 0 20px rgba(60, 150, 255, 0.55);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}

.btn:hover { transform: scale(1.05); box-shadow: 0 0 28px rgba(80, 170, 255, 0.85); }

/* ---------- 模式选择 ---------- */
#mode-select {
  pointer-events: auto;
  display: flex;
  gap: 12px;
  margin-top: 4px;
}

.mode-btn {
  font-size: 15px;
  letter-spacing: 2px;
  color: #9fc4ef;
  background: rgba(20, 44, 80, 0.55);
  border: 1px solid rgba(110, 170, 255, 0.35);
  border-radius: 22px;
  padding: 9px 22px;
  cursor: pointer;
  transition: all 0.12s ease;
}

.mode-btn:hover { border-color: rgba(140, 200, 255, 0.8); }

.mode-btn.selected {
  color: #061020;
  background: linear-gradient(180deg, #9fe8ff, #4aa8ff);
  border-color: transparent;
  font-weight: bold;
  box-shadow: 0 0 16px rgba(80, 170, 255, 0.6);
}
.btn:active { transform: scale(0.97); }

.hint {
  font-size: 12px;
  color: #6f9fd8;
  letter-spacing: 1px;
}

/* 移动端炸弹按钮 */
#btn-bomb {
  position: absolute;
  right: 22px;
  bottom: 64px;
  z-index: 6;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid rgba(255, 210, 90, 0.6);
  background: rgba(40, 30, 8, 0.55);
  color: #ffd25d;
  font-size: 26px;
  backdrop-filter: blur(4px);
  pointer-events: auto;
}

/* 游戏中暂停按钮 */
#btn-pause {
  position: absolute;
  top: 64px;
  right: 14px;
  z-index: 6;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid rgba(110, 170, 255, 0.5);
  background: rgba(8, 16, 38, 0.55);
  color: #9fd4ff;
  font-size: 20px;
  line-height: 1;
  backdrop-filter: blur(4px);
  pointer-events: auto;
  cursor: pointer;
}

#btn-pause:active { transform: scale(0.94); }

#pause-info {
  font-size: 16px;
  color: #a9cdf5;
  letter-spacing: 1px;
  line-height: 1.9;
  font-variant-numeric: tabular-nums;
}

/* 暂停界面次要按钮 */
.btn-ghost {
  background: rgba(20, 44, 80, 0.55);
  color: #9fc4ef;
  border: 1px solid rgba(110, 170, 255, 0.4);
  box-shadow: none;
  font-size: 15px;
  padding: 10px 34px;
}

.btn-ghost:hover { border-color: rgba(140, 200, 255, 0.8); box-shadow: none; }