/* ============================================================
   李爸刷題網 — 共用樣式
   * 色彩 token (淺色 / 深色)
   * 防止中文按鈕逐字斷行
   * 自訂卷軸
   ============================================================ */

:root {
  --lc-bg:           #f7f8fb;
  --lc-bg-soft:      #eef1f6;
  --lc-surface:      #ffffff;
  --lc-ink:          #0f172a;
  --lc-ink-muted:    #64748b;
  --lc-border:       #e2e8f0;
  --lc-primary:      #10b981;
  --lc-primary-dark: #059669;
  --lc-success:      #10b981;
  --lc-success-soft: #d1fae5;
  --lc-warning:      #f59e0b;
  --lc-warning-soft: #fef3c7;
  --lc-danger:       #ef4444;
  --lc-danger-soft:  #fee2e2;
}

.lc-dark {
  --lc-bg:           #0b1220;
  --lc-bg-soft:      #131c2e;
  --lc-surface:      #182338;
  --lc-ink:          #f1f5f9;
  --lc-ink-muted:    #94a3b8;
  --lc-border:       #3b4a6b;
  --lc-success-soft: #064e3b;
  --lc-warning-soft: #78350f;
  --lc-danger-soft:  #7f1d1d;
}

html, body {
  background: var(--lc-bg);
  color: var(--lc-ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
}

/* 防止短中文按鈕逐字斷行（直書） */
button { word-break: keep-all; overflow-wrap: normal; }
.lc-btn-label { white-space: nowrap; }

/* 卷軸 */
* { scrollbar-width: thin; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { background: var(--lc-border); border-radius: 4px; }

/* 字級 scale 透過 root font-size 控制（fontScale × 16px） */
html { font-size: calc(16px * var(--lc-font-scale, 1)); }

/* 隱藏前先準備好 Alpine cloak */
[x-cloak] { display: none !important; }

/* 按鈕 hover 反饋 */
.lc-btn-primary {
  background: var(--lc-primary);
  color: #fff;
  font-weight: 900;
  border-radius: 1rem;
  transition: filter .15s, transform .05s;
}
.lc-btn-primary:hover { filter: brightness(1.08); }
.lc-btn-primary:active { transform: scale(0.99); }
.lc-btn-primary:disabled { opacity: 0.4; cursor: not-allowed; filter: none; transform: none; }

.lc-btn-secondary {
  background: var(--lc-bg-soft);
  color: var(--lc-ink);
  font-weight: 700;
  border: 2px solid var(--lc-border);
  border-radius: 0.875rem;
  transition: filter .15s, transform .05s, background .15s;
}
.lc-btn-secondary:hover { background: var(--lc-border); }
.lc-btn-secondary:active { transform: scale(0.99); }
.lc-btn-secondary:disabled { opacity: 0.4; cursor: not-allowed; filter: none; transform: none; }

.lc-btn-ghost {
  background: var(--lc-surface);
  color: var(--lc-ink);
  font-weight: 700;
  border: 2px solid var(--lc-border);
  border-radius: 1rem;
  transition: background .15s, transform .05s;
}
.lc-btn-ghost:hover { background: var(--lc-bg-soft); }
.lc-btn-ghost:active { transform: scale(0.99); }
.lc-btn-ghost:disabled { opacity: 0.4; cursor: not-allowed; }

/* 選項按鈕 */
.lc-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--lc-surface);
  border: 2px solid var(--lc-border);
  border-radius: 1rem;
  color: var(--lc-ink);
  text-align: left;
  transition: border-color .15s, background .15s;
  font-size: 1rem;
  line-height: 1.4;
}
.lc-option:hover { background: var(--lc-bg-soft); }
.lc-option.selected {
  border-color: var(--lc-primary);
  background: color-mix(in srgb, var(--lc-primary) 10%, transparent);
}
.lc-option .badge {
  flex: 0 0 auto;
  width: 2.25rem; height: 2.25rem;
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 900;
  background: var(--lc-bg-soft);
  color: var(--lc-ink-muted);
  border: 2px solid var(--lc-border);
}
.lc-option.selected .badge {
  background: var(--lc-primary);
  color: #fff;
  border-color: var(--lc-primary);
}
.lc-option .badge.circle { border-radius: 9999px; }
.lc-option .badge.square { border-radius: 0.5rem; }
.lc-option .text { flex: 1; min-width: 0; }

/* AdSense 廣告版位：審核期 / 載入中顯示框與標籤；
   廣告載入後 AdSense 自己的 iframe 會撐滿並蓋住 ::before。 */
.adsbygoogle {
  min-height: 90px;
  background: var(--lc-bg-soft);
  border: 1px dashed var(--lc-border);
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}
.adsbygoogle::before {
  content: "廣告";
  position: absolute;
  top: 6px; left: 8px;
  font-size: 10px;
  letter-spacing: 0.15em;
  font-weight: 800;
  color: var(--lc-ink-muted);
  background: var(--lc-bg);
  border: 1px solid var(--lc-border);
  border-radius: 4px;
  padding: 1px 6px;
  z-index: 0;
}

/* 圓環分數 */
.lc-ring {
  position: relative;
  width: 96px; height: 96px;
  flex-shrink: 0;
}
.lc-ring svg { transform: rotate(-90deg); }
.lc-ring-label {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}

/* 倒數 chip */
.lc-timer {
  display: inline-flex; align-items: center; gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  background: var(--lc-bg-soft);
  border: 2px solid var(--lc-border);
  border-radius: 9999px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.lc-timer.warn { color: var(--lc-warning); border-color: var(--lc-warning); }
.lc-timer.danger { color: var(--lc-danger); border-color: var(--lc-danger); animation: lc-pulse 1s infinite; }
@keyframes lc-pulse { 50% { opacity: 0.55; } }

/* 題目導覽格子 */
.lc-nav-cell {
  aspect-ratio: 1 / 1;
  display: grid; place-items: center;
  border-radius: 0.625rem;
  border: 2px solid var(--lc-border);
  background: var(--lc-surface);
  color: var(--lc-ink);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  transition: transform .05s;
  position: relative;
}
.lc-nav-cell:hover { transform: scale(1.04); }
.lc-nav-cell.answered { background: var(--lc-success-soft); border-color: var(--lc-success); color: var(--lc-success); }
.lc-nav-cell.current { background: var(--lc-primary); border-color: var(--lc-primary); color: #fff; }
.lc-nav-cell.marked::after {
  content: "★";
  position: absolute;
  top: 1px; right: 2px;
  color: var(--lc-warning);
  font-size: 11px;
  line-height: 1;
  pointer-events: none;
}
/* 圖例小方格不顯示星號 */
.lc-nav-cell.marked.lc-legend::after { display: none; }

/* 深色模式切換按鈕（固定右上） */
.lc-theme-toggle {
  position: fixed;
  top: 12px; right: 12px;
  z-index: 60;
  width: 40px; height: 40px;
  border-radius: 9999px;
  display: grid; place-items: center;
  background: var(--lc-surface);
  border: 2px solid var(--lc-border);
  color: var(--lc-ink);
  font-size: 18px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  transition: transform .1s, background .15s;
}
.lc-theme-toggle:hover { background: var(--lc-bg-soft); }
.lc-theme-toggle:active { transform: scale(0.94); }

/* 行動裝置：exam 頁的右上浮動按鈕隱藏（已移到 footer 中間）；其他頁保持 */
@media (max-width: 640px) {
  .lc-toggle-exam {
    display: none !important;
  }
}

/* 填空 input */
.lc-blank {
  display: inline-block;
  width: 6em;          /* 大部分答案 1-3 字，6em 對中英文都夠 */
  max-width: 100%;     /* 防止在窄容器中溢位 */
  min-width: 3rem;
  padding: 0.25rem 0.5rem;
  margin: 0 0.25rem;
  border: 0;
  border-bottom: 3px solid var(--lc-primary);
  background: transparent;
  color: var(--lc-ink);
  font-weight: 800;
  text-align: center;
  font-size: 16px;     /* iOS 防止 focus 時自動縮放 */
  outline: none;
  vertical-align: baseline;
}
.lc-blank:focus { background: var(--lc-bg-soft); }