/* =========================================================================
   games.css — 只在 games.html 載入。

   兩部分:
     A. arcade 外殼 — 卡片牆(.arcade-*)+ 遊戲舞台(.stage-*)
     B. 共享遊戲 UI 工具 class(.gu-*),供各遊戲模組選用,統一外觀

   各遊戲模組自帶 scoped CSS(前綴 g-<id>-),不寫在這裡。
   全部沿用 styles.css 的 MD3 token,深/淺色自動跟著切。
   ========================================================================= */

/* ---------- A. arcade 卡片牆 ---------- */
.arcade-filters {
  display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 22px;
}
.arcade-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}
/* an explicit display: wins over the UA [hidden] rule, so re-assert it here */
.arcade-grid[hidden], .arcade-filters[hidden] { display: none; }
.gcard {
  position: relative; display: flex; flex-direction: column; gap: 10px;
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: var(--radius); padding: 20px 18px; cursor: pointer; text-align: left;
  font: inherit; color: var(--on-surface);
  transition: box-shadow .18s, transform .18s, border-color .18s;
  overflow: hidden;
}
.gcard::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: var(--gcard-accent, var(--primary));
}
.gcard:hover, .gcard:focus-visible {
  box-shadow: var(--elev-2); transform: translateY(-3px);
  border-color: var(--gcard-accent, var(--primary)); outline: none;
}
.gcard__icon {
  display: inline-grid; place-items: center; width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--gcard-accent, var(--primary)) 16%, var(--surface));
  color: var(--gcard-accent, var(--primary));
}
.gcard__icon .material-symbols-rounded { font-size: 28px; }
.gcard__cat {
  font-size: .7rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase;
  color: var(--gcard-accent, var(--primary));
}
.gcard__title { font-size: 1.08rem; font-weight: 700; margin: 0; line-height: 1.25; }
.gcard__tag { font-size: .85rem; color: var(--on-surface-variant); margin: 0; line-height: 1.4; }
.gcard__best {
  margin-top: auto; align-self: flex-start; font-size: .72rem; font-weight: 600;
  color: var(--on-secondary-container); background: var(--secondary-container);
  border-radius: var(--radius-lg); padding: 2px 10px;
}
.gcard__play {
  display: inline-flex; align-items: center; gap: 4px; margin-top: 4px;
  font-size: .82rem; font-weight: 600; color: var(--gcard-accent, var(--primary));
}

/* ---------- A. 遊戲舞台(開啟單一遊戲時) ---------- */
.arcade-stage[hidden] { display: none; }
.stage-bar {
  display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.stage-back {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px 8px 12px;
  border-radius: var(--radius-lg); border: 1px solid var(--outline-variant);
  background: var(--surface-container); color: var(--on-surface); cursor: pointer;
  font: inherit; font-weight: 600; transition: background .15s;
}
.stage-back:hover { background: var(--surface-container-high); }
.stage-title { font-size: 1.3rem; font-weight: 700; margin: 0; }
.stage-cat {
  font-size: .72rem; font-weight: 600; color: var(--on-surface-variant);
  background: var(--surface-variant); border-radius: var(--radius-lg); padding: 3px 10px;
}
.game-host { width: 100%; }

/* ---------- B. 共享遊戲 UI 工具(.gu-*) ---------- */
.gu-center { display: flex; flex-direction: column; align-items: center; gap: 14px; }
.gu-panel {
  background: var(--surface-container); border: 1px solid var(--outline-variant);
  border-radius: var(--radius); padding: 18px; width: 100%;
}
.gu-row { display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.gu-title { font-size: 1.05rem; font-weight: 700; margin: 0; color: var(--on-surface); }
.gu-hint { font-size: .85rem; color: var(--on-surface-variant); text-align: center; margin: 0; }

.gu-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius-lg); font: inherit; font-weight: 600;
  cursor: pointer; border: 1px solid var(--outline-variant);
  background: var(--surface-container-high); color: var(--on-surface);
  transition: background .15s, box-shadow .15s, transform .08s;
}
.gu-btn:hover { background: var(--surface-variant); }
.gu-btn:active { transform: scale(.97); }
.gu-btn:disabled { opacity: .5; cursor: not-allowed; }
.gu-btn--primary { background: var(--primary); color: var(--on-primary); border-color: transparent; }
.gu-btn--primary:hover { background: var(--primary); box-shadow: var(--elev-2); }
.gu-btn--tonal {
  background: var(--primary-container); color: var(--on-primary-container); border-color: transparent;
}

.gu-statbar { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; width: 100%; }
.gu-stat {
  flex: 1 1 90px; min-width: 80px; background: var(--surface-container);
  border: 1px solid var(--outline-variant); border-radius: var(--radius);
  padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; align-items: center;
}
.gu-stat__v { font-size: 1.5rem; font-weight: 800; color: var(--on-surface); line-height: 1.1; }
.gu-stat__k { font-size: .72rem; color: var(--on-surface-variant); text-align: center; }

/* 共用:讓任何遊戲區塊不要在小螢幕溢出 */
.game-host * { max-width: 100%; }
@media (max-width: 420px) {
  .arcade-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .gcard { padding: 16px 14px; }
}