/* ===========================================================
   天音彼方 打肉！ — 樣式 + 網頁防雷
   =========================================================== */

/* --- 防雷：鎖捲動、禁選取、禁長按選單、禁雙擊縮放 --- */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  overflow: hidden;                 /* 防整頁捲動 */
  overscroll-behavior: none;        /* 防下拉刷新 / 彈跳 */
  background: #1a2238;
  touch-action: none;               /* 防雙擊縮放、捲動手勢 */
  -webkit-user-select: none;        /* 防連點選到文字 */
  -moz-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;      /* iOS 防長按選單 */
  font-family: "Segoe UI", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

#game-shell {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

#game {
  display: block;
  width: min(96vw, calc(96vh * 1.6));   /* 維持 960:600 = 1.6 比例 */
  height: auto;
  aspect-ratio: 960 / 600;
  border-radius: 18px;
  box-shadow: 0 20px 60px rgba(0,0,0,.45), 0 0 0 4px rgba(255,255,255,.06);
  background: #bfe3ff;
  cursor: pointer;
  image-rendering: optimizeQuality;
  -webkit-user-drag: none;          /* 防拖曳 */
}

#hint {
  color: rgba(255,255,255,.65);
  font-size: 13px;
  letter-spacing: .5px;
  pointer-events: none;

  .hint-touch {
    display: none;
  }
}

/* --- 手機直立：蓋轉橫提示（僅觸控裝置，桌機縮窄視窗不觸發） --- */
#rotate-tip {
  display: none;
}

@media (orientation: portrait) and (pointer: coarse) {
  #rotate-tip {
    position: fixed;
    inset: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    background-color: color-mix(in srgb, #1a2238 94%, #000);
    color: color-mix(in srgb, #fff 92%, #1a2238);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;

    .rotate-icon {
      font-size: 64px;
      animation: rotate-nudge 1.6s ease-in-out infinite;
    }
  }
}

@keyframes rotate-nudge {
  0%, 55%, 100% { transform: rotate(0deg); }
  25%, 35% { transform: rotate(90deg); }
}

@media (pointer: coarse) {
  #hint {
    .hint-keyboard {
      display: none;
    }

    .hint-touch {
      display: inline;
    }
  }
}

@media (max-height: 520px) {
  #hint { display: none; }
}