:root {
  --primary: #1f6feb;
  --primary-dark: #1a5fc4;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --border: #d0d7de;
  --danger: #cf222e;
  --ok: #1a7f37;
  --warn: #bf8700;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 960px; margin: 0 auto; padding: 16px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }

/* 置中卡片（登入/待審等） */
.center-box {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  max-width: 420px;
  margin: 24px auto;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.card h1 { font-size: 1.35rem; margin: 0 0 4px; }

/* 表單 */
form { width: 100%; display: flex; flex-direction: column; gap: 8px; text-align: left; margin-top: 12px; }
label { font-size: .9rem; color: var(--muted); }
input[type="email"], input[type="text"], input[type="datetime-local"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }

button {
  padding: 10px 16px;
  border: none;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
button:hover { background: var(--primary-dark); }
button:disabled { opacity: .6; cursor: not-allowed; }
button.secondary { background: #eef1f5; color: var(--text); font-weight: 500; }
button.secondary:hover { background: #e2e7ee; }

.hint { font-size: .9rem; padding: 10px 12px; border-radius: 8px; }
.hint.ok { background: #e8f5ec; color: var(--ok); }
.hint.err { background: #fdeced; color: var(--danger); }

/* 應用頁首 */
.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px;
}
.brand { font-weight: 700; }
.app-user { display: flex; align-items: center; gap: 10px; }
.badge { font-size: .75rem; padding: 2px 8px; border-radius: 999px; background: #eef1f5; color: var(--muted); }
.badge.admin { background: #fde8cf; color: var(--warn); }
.badge.reviewer { background: #e3effd; color: var(--primary); }

/* 分頁導覽列 */
.app-nav {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 16px;
}
.app-nav .nav-item { font-weight: 500; }
.app-nav .nav-item.active { background: var(--primary); color: #fff; }
.app-nav .nav-item.active:hover { background: var(--primary-dark); }

/* 子頁 */
.subview-title { margin: 0 0 4px; font-size: 1.2rem; }
.subview h3 { font-size: 1rem; margin: 20px 0 8px; }
.count-badge {
  display: inline-block; min-width: 20px; text-align: center;
  font-size: .8rem; padding: 1px 7px; border-radius: 999px;
  background: var(--warn); color: #fff; vertical-align: middle;
}

/* 資料表 */
.data-table { width: 100%; border-collapse: collapse; background: var(--card);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.data-table th, .data-table td {
  text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border);
  font-size: .92rem; vertical-align: middle;
}
.data-table th { background: #f0f3f7; color: var(--muted); font-weight: 600; }
.data-table tr:last-child td { border-bottom: none; }
.u-name { font-weight: 600; }
.u-name .you { font-weight: 400; color: var(--muted); font-size: .85rem; }
.u-email { font-size: .82rem; }
.row-actions { white-space: nowrap; }

/* 狀態藥丸 */
.pill { display: inline-block; font-size: .78rem; padding: 2px 10px; border-radius: 999px; font-weight: 600; }
.pill.pending  { background: #fdeecb; color: var(--warn); }
.pill.approved { background: #e8f5ec; color: var(--ok); }
.pill.disabled { background: #f0f1f3; color: var(--muted); }

/* 小型操作按鈕 */
button.mini { padding: 5px 12px; font-size: .82rem; font-weight: 600; border-radius: 6px; }
button.mini.ok     { background: var(--ok); }
button.mini.ok:hover     { background: #15602a; }
button.mini.danger { background: var(--danger); }
button.mini.danger:hover { background: #a71622; }
button.mini.warn   { background: var(--warn); }
button.mini.warn:hover   { background: #9c6d00; }
select.role-select { width: auto; padding: 5px 8px; font-size: .85rem; }

/* 後臺行內表單（類別／場地新增編輯） */
.inline-form {
  display: flex; flex-direction: row; flex-wrap: wrap; gap: 12px; align-items: flex-end;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; margin: 8px 0 16px;
  width: 100%;
}
.inline-form .field { display: flex; flex-direction: column; gap: 4px; flex: 1 1 160px; margin: 0; }
.inline-form .field.narrow { flex: 0 0 90px; }
.inline-form .field.wide { flex: 2 1 240px; }
.inline-form .field.actions { flex: 0 0 auto; flex-direction: row; gap: 8px; }
.inline-form label { font-size: .82rem; }
.inline-form input, .inline-form select { width: 100%; }

/* 審核人 chip */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: #e3effd; color: var(--primary);
  padding: 3px 6px 3px 10px; border-radius: 999px; font-size: .82rem; margin: 2px 4px 2px 0;
}
.chip-x {
  background: transparent; color: var(--primary); padding: 0 2px;
  font-size: 1rem; line-height: 1; border-radius: 50%; font-weight: 700;
}
.chip-x:hover { background: rgba(31,111,235,.15); }

/* 審核人管理面板（展開列） */
.data-table tr.panel-row td { background: #f7f9fc; padding: 14px 16px; }
.reviewer-panel { display: flex; flex-direction: column; gap: 10px; }
.rev-current { display: flex; flex-wrap: wrap; align-items: center; }
.rev-add-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.rev-add-row select { width: auto; min-width: 220px; padding: 6px 8px; }

/* 首頁快速卡片 */
.home-cards { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0; }
.home-card {
  flex: 1 1 200px; max-width: 260px; text-align: left;
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; color: var(--text); font-weight: 400; cursor: pointer;
}
.home-card:hover { background: #f0f6ff; border-color: var(--primary); }
.hc-title { font-weight: 700; font-size: 1.05rem; margin-bottom: 4px; }
.hc-desc { font-size: .85rem; }
.home-hint { margin-top: 8px; font-size: .88rem; }

/* 節次選擇器 */
.period-picker { display: flex; flex-wrap: wrap; gap: 6px; }
.period-btn {
  display: flex; flex-direction: column; align-items: center; line-height: 1.2;
  background: #eef1f5; color: var(--text); font-weight: 600;
  padding: 6px 10px; border-radius: 8px; font-size: .85rem;
}
.period-btn:hover { background: #e2e7ee; }
.period-btn.active { background: var(--primary); color: #fff; }
.period-btn .pb-time { font-size: .68rem; font-weight: 400; opacity: .8; margin-top: 2px; }
.inline-form .field.full { flex: 1 1 100%; }

/* 篩選分頁（審核清單） */
.filter-tabs { display: flex; gap: 6px; margin: 8px 0 14px; }
.filter-tab {
  background: #eef1f5; color: var(--text); font-weight: 500;
  padding: 6px 16px; border-radius: 999px; font-size: .9rem;
}
.filter-tab:hover { background: #e2e7ee; }
.filter-tab.active { background: var(--primary); color: #fff; }
.filter-tab.active:hover { background: var(--primary-dark); }

/* 行事曆工具列 */
.cal-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px; margin-bottom: 14px;
}
.cal-nav { display: flex; gap: 6px; }
.cal-nav button { padding: 6px 12px; }
.cal-period { font-weight: 700; font-size: 1.05rem; }
.cal-filters { display: flex; gap: 8px; margin-left: auto; }
.cal-filters select { width: auto; padding: 6px 8px; }
.cal-legend { display: flex; gap: 12px; margin-top: 12px; font-size: .85rem; align-items: center; }

/* 事件卡片（週與月共用） */
.cal-event {
  font-size: .78rem; line-height: 1.3; padding: 3px 6px; border-radius: 6px;
  margin-bottom: 4px; overflow: hidden; cursor: default;
  border-left: 3px solid transparent;
}
.cal-event .ev-time { font-weight: 700; }
.cal-event .ev-venue { display: block; }
.cal-event .ev-purpose { display: block; color: inherit; opacity: .85; }
/* 已核准：實心底 */
.cal-event.approved { background: #e8f5ec; border-left-color: var(--ok); color: #12591f; }
/* 待審：斜線紋 + 虛線，明顯區隔 */
.cal-event.pending {
  background: repeating-linear-gradient(45deg, #fff7e6, #fff7e6 6px, #fdeecb 6px, #fdeecb 12px);
  border-left: 3px dashed var(--warn); color: #8a6100;
}

/* 週視角 */
.cal-week { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.cal-day {
  background: var(--card); border: 1px solid var(--border); border-radius: 8px;
  padding: 8px; min-height: 120px; display: flex; flex-direction: column;
}
.cal-day.today { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }
.cal-day-head { font-size: .82rem; color: var(--muted); font-weight: 600; margin-bottom: 6px; display: flex; justify-content: space-between; }
.cal-day-date { color: var(--text); }
.cal-events { flex: 1; }
.cal-empty { text-align: center; font-size: .8rem; padding-top: 12px; }

/* 月視角 */
.cal-weekdays { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; margin-bottom: 4px; }
.cal-weekdays div { text-align: center; font-size: .8rem; color: var(--muted); font-weight: 600; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 4px; }
.cal-cell {
  background: var(--card); border: 1px solid var(--border); border-radius: 6px;
  padding: 4px; min-height: 92px; overflow: hidden;
}
.cal-cell.other-month { background: #fafbfc; }
.cal-cell.other-month .cal-date { color: var(--muted); }
.cal-cell.today { border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }
.cal-date { font-size: .8rem; font-weight: 600; margin-bottom: 3px; }
.cal-cell .cal-event { font-size: .72rem; padding: 2px 4px; margin-bottom: 2px; }
.cal-cell .cal-event .ev-venue { display: inline; }
.cal-more { font-size: .72rem; }

/* 窄螢幕：週視角改為單欄堆疊，月視角維持格狀但縮小 */
@media (max-width: 640px) {
  .cal-week { grid-template-columns: 1fr; }
  .cal-day { min-height: auto; }
  .cal-filters { margin-left: 0; }
  .cal-cell { min-height: 64px; }
  .cal-cell .cal-event .ev-time { font-size: .68rem; }
}

/* 可預約場地卡片 */
.venue-cards { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 8px; }
.venue-card {
  flex: 1 1 200px; max-width: 280px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px;
  display: flex; flex-direction: column; gap: 4px;
}
.vc-name { font-weight: 700; font-size: 1.02rem; }
/* 場地代碼標籤（穩定識別碼，與可變的教室名稱區分） */
.venue-code {
  display: inline-block; font-family: ui-monospace, "Consolas", monospace;
  font-size: .82rem; font-weight: 700; color: var(--primary);
  background: #eef4ff; border-radius: 5px; padding: 1px 6px;
}
td .venue-code { font-size: .8rem; }
.vc-meta, .vc-desc { font-size: .84rem; }
.venue-card button.mini { margin-top: 8px; align-self: flex-start; }

/* 表單內固定顯示欄位（已選場地名稱） */
.fixed-field {
  padding: 10px 12px; border: 1px dashed var(--border);
  border-radius: 8px; background: #f7f9fc; font-weight: 600;
}

/* 已退回 / 已取消 狀態藥丸 */
.pill.rejected  { background: #fdeced; color: var(--danger); }
.pill.cancelled { background: #f0f1f3; color: var(--muted); }

/* 連線狀態指示燈 */
.conn-status {
  position: fixed; top: 8px; right: 10px;
  display: flex; align-items: center; gap: 6px;
  font-size: .75rem; color: var(--muted);
  background: var(--card); border: 1px solid var(--border);
  border-radius: 999px; padding: 3px 10px; z-index: 50;
}
.conn-status .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.conn-status.ok  .dot { background: var(--ok); }
.conn-status.bad .dot { background: var(--danger); }

/* 全域錯誤提示 */
.toast {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--danger); color: #fff;
  padding: 12px 18px; border-radius: 8px; z-index: 100;
  max-width: 90%; box-shadow: 0 3px 10px rgba(0,0,0,.2);
}