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

html, body {
  height: 100%;
  background: #0a121c;
  color: #cfd8e3;
  font-family: Consolas, Menlo, "Courier New", monospace;
  overflow: hidden;
}

#frame {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

header {
  padding: 8px 0 4px;
  text-align: center;
  flex: 0 0 auto;
}

header h1 {
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 8px;
  padding-left: 8px; /* 抵銷最後一字的字距，維持視覺置中 */
  color: #7fe0d0;
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.85), 0 0 14px rgba(127, 224, 208, 0.4);
}

.subtitle {
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  font-size: 13px;
  color: #6b7686;
  letter-spacing: 3px;
  margin-top: 3px;
}

#canvas-wrap {
  flex: 1 1 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 0;
  padding: 6px;
}

canvas#game {
  background: #0e1420;
  border: 2px solid #234050;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.6);
  /* CSS 等比縮放；邏輯解析度固定 960x720，縮放不影響碰撞 */
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: 4 / 3;
}

footer {
  flex: 0 0 auto;
  padding: 6px 0 10px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  font-size: 13px;
  letter-spacing: 1px;
  color: #6b7686;
}

.controls b {
  color: #9fb0c6;
  font-family: Consolas, Menlo, "Courier New", monospace;
}

/* ---- 觸控控制（預設隱藏，setupTouchControls 動態插入後才顯示） ---- */
#touch {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 50;
  touch-action: none;
  user-select: none;
}

#tc-stick {
  position: absolute;
  left: 24px;
  bottom: 28px;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: rgba(20, 40, 56, 0.4);
  border: 2px solid rgba(127, 224, 208, 0.5);
  pointer-events: auto;
  touch-action: none;
}

#tc-nub {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 56px;
  height: 56px;
  margin: -28px 0 0 -28px;
  border-radius: 50%;
  background: rgba(127, 224, 208, 0.75);
  box-shadow: 0 0 12px rgba(127, 224, 208, 0.5);
}

#tc-actions {
  position: absolute;
  right: 20px;
  bottom: 28px;
  display: grid;
  grid-template-columns: repeat(3, 72px);
  gap: 12px;
  pointer-events: none;
}

.tc-btn {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid rgba(159, 176, 198, 0.6);
  background: rgba(20, 40, 56, 0.55);
  color: #eaf7f4;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", sans-serif;
  font-size: 22px;
  font-weight: 700;
  pointer-events: auto;
  touch-action: none;
}

.tc-btn.active { background: rgba(127, 224, 208, 0.55); transform: scale(0.94); }
.tc-tool { border-color: rgba(127, 216, 232, 0.7); }
.tc-fire { border-color: rgba(242, 193, 78, 0.85); background: rgba(80, 60, 20, 0.55); font-size: 24px; }