/* ==========================================================================
   後台專用樣式
   ========================================================================== */

body.admin { background: var(--c-bg); }

/* ── 登入閘門 ─────────────────────────────────────────────────────────── */
.gate {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px;
  background: linear-gradient(160deg, #eef2ff 0%, var(--c-bg) 55%);
}
.gate__card {
  width: min(440px, 100%); background: var(--c-surface);
  border: 1px solid var(--c-border); border-radius: var(--r-xl);
  box-shadow: var(--sh-3); padding: 32px 30px;
}
.gate__brand { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.gate__brand h1 { margin: 0; font-size: 1.3rem; }
.gate__brand p { margin: 0; }
.gate__form { display: flex; flex-direction: column; gap: 4px; }
.gate__form .btn { margin-top: 16px; }

/* ── 版面 ─────────────────────────────────────────────────────────────── */
.admin-top {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 10px 20px; background: rgba(255,255,255,.94);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border);
}
.admin-top__left { display: flex; align-items: center; gap: 12px; }
.admin-top__left strong { display: block; font-size: .98rem; }
.admin-top__left small { display: block; font-size: .75rem; }
.admin-top__right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.admin-body { display: grid; grid-template-columns: 208px minmax(0, 1fr); gap: 24px; max-width: 1360px; margin: 0 auto; padding: 22px 20px 60px; align-items: start; }
.admin-body > * { min-width: 0; }

.admin-nav { position: sticky; top: 76px; display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.admin-nav__item {
  padding: 10px 14px; border-radius: var(--r-md); text-decoration: none;
  color: var(--c-text-2); font-size: .89rem; font-weight: 600;
  border-left: 3px solid transparent; transition: background .15s, color .15s, border-color .15s;
}
.admin-nav__item:hover { background: var(--c-surface); color: var(--c-text); }
.admin-nav__item.is-active { background: var(--c-surface); color: var(--c-primary-d); border-left-color: var(--c-primary); box-shadow: var(--sh-1); }

.admin-main { min-width: 0; }
.panel { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--r-xl); box-shadow: var(--sh-1); overflow: hidden; }
.panel__head { padding: 22px 26px 0; }
.panel__head h2 { margin: 0 0 6px; }
.panel__body { padding: 20px 26px 26px; }
.panel__foot { display: flex; gap: 10px; flex-wrap: wrap; padding-top: 18px; margin-top: 20px; border-top: 1px solid var(--c-border); }

.form-block { border: 1px solid var(--c-border); border-radius: var(--r-lg); padding: 18px 20px; margin-bottom: 18px; }
.form-block h3 { margin: 0 0 12px; font-size: 1rem; color: var(--c-primary-d); }
.form-block--inset { background: var(--c-surface-2); }
.check-row { display: flex; flex-direction: column; gap: 2px; margin-top: 12px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.toolbar .input { min-width: 160px; }

/* ── 提示詞編輯 ───────────────────────────────────────────────────────── */
.prompt-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 18px; }
.prompt-tabs { display: flex; flex-direction: column; gap: 2px; }
.prompt-tabs__btn {
  text-align: left; padding: 9px 12px; border-radius: var(--r-md); border: 1px solid transparent;
  background: transparent; color: var(--c-text-2); font: inherit; font-size: .86rem; cursor: pointer;
  transition: background .15s;
}
.prompt-tabs__btn:hover { background: var(--c-surface-2); }
.prompt-tabs__btn.is-active { background: var(--c-primary-l); color: var(--c-primary-d); font-weight: 700; border-color: #c7d2fe; }
.input--code { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: .83rem; line-height: 1.6; }
.preview-box {
  margin-top: 18px; background: #0f172a; color: #e2e8f0; border-radius: var(--r-md);
  padding: 16px 18px; font-family: ui-monospace, Consolas, monospace; font-size: .8rem;
  white-space: pre-wrap; max-height: 420px; overflow: auto;
}

/* ── 匯入 ─────────────────────────────────────────────────────────────── */
.steps-hint { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.steps-hint__item { display: flex; align-items: center; gap: 7px; font-size: .85rem; font-weight: 700; color: var(--c-text-2); }
.steps-hint__item b {
  width: 22px; height: 22px; border-radius: 50%; background: var(--c-primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: .75rem;
}
.steps-hint__arrow { color: var(--c-text-3); }
.tabs-sm { display: inline-flex; gap: 4px; background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--r-md); padding: 4px; }
.tabs-sm__btn {
  border: 0; background: transparent; font: inherit; font-size: .85rem; font-weight: 600;
  color: var(--c-text-2); padding: 7px 14px; border-radius: 8px; cursor: pointer;
}
.tabs-sm__btn.is-active { background: var(--c-surface); color: var(--c-primary-d); box-shadow: var(--sh-1); }

.mapping-area { border: 1px dashed var(--c-border-2); border-radius: var(--r-md); padding: 14px; background: var(--c-surface-2); }
.mapping-row { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 10px; align-items: center; padding: 6px 0; font-size: .86rem; }
.mapping-row__src { font-weight: 700; color: var(--c-text); }
.mapping-row__arrow { color: var(--c-text-3); }
.mapping-row select { width: 100%; }
.mapping-row.is-unmapped select { border-color: var(--c-warn); background: var(--c-warn-l); }

/* ── 欄位對應預設列 ───────────────────────────────────────────────────── */
.preset-bar { display: flex; align-items: flex-end; gap: 10px; margin: 12px 0 6px; flex-wrap: wrap; }
.preset-bar .field { flex: 1 1 320px; min-width: 0; }
.preset-bar .input { width: 100%; }
.preset-bar .btn { flex: 0 0 auto; }
@media (max-width: 640px) {
  .preset-bar { flex-direction: column; align-items: stretch; }
  .preset-bar .btn { width: 100%; }
}

.history-list { display: grid; gap: 8px; }
.history-item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface); font-size: .85rem;
}
.history-item__meta { color: var(--c-text-3); font-size: .78rem; }

/* ── 學習目標清單預覽 ─────────────────────────────────────────────────── */
.std-item {
  padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface); font-size: .85rem;
}
.std-item__head { display: flex; align-items: center; gap: 10px; margin-bottom: 4px; }
.std-item__text { margin: 0; color: var(--c-text-2); line-height: 1.6; }

/* ── 提示訊息 ─────────────────────────────────────────────────────────── */
.notice {
  padding: 10px 14px; border-radius: var(--r-md); border: 1px solid var(--c-border);
  background: var(--c-surface-2); font-size: .85rem; line-height: 1.65;
}
.notice code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em;
  background: var(--c-surface); padding: 1px 5px; border-radius: var(--r-sm);
  border: 1px solid var(--c-border);
}
.notice--warn { background: var(--c-warn-l); border-color: var(--c-warn); color: var(--c-warn); }
.notice--warn code { background: rgba(255, 255, 255, .7); border-color: rgba(180, 83, 9, .3); }

/* ── API Key 池 ───────────────────────────────────────────────────────── */
.keypool-list { display: grid; gap: 8px; }
.keypool-item {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 14px; border: 1px solid var(--c-border); border-radius: var(--r-md);
  background: var(--c-surface);
}
.keypool-item__idx {
  flex: 0 0 22px; height: 22px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--c-primary-l); color: var(--c-primary-d); font-weight: 800; font-size: .72rem;
}
.keypool-item__main { flex: 1 1 260px; min-width: 0; }
.keypool-item__head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 2px; }
.keypool-item__mask {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .82rem;
  background: var(--c-surface-2); padding: 2px 6px; border-radius: var(--r-sm);
}
.keypool-item__actions { display: flex; gap: 6px; flex-wrap: wrap; }
@media (max-width: 700px) {
  .keypool-item__actions { width: 100%; }
  .keypool-item__actions .btn { flex: 1 1 auto; }
}

/* ── 紀錄列表 ─────────────────────────────────────────────────────────── */
.records { display: grid; gap: 10px; }
.record {
  border: 1px solid var(--c-border); border-radius: var(--r-md); padding: 14px 16px;
  background: var(--c-surface); transition: box-shadow .15s;
}
.record:hover { box-shadow: var(--sh-2); }
.record__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 6px; }
.record__title { font-weight: 800; font-size: .95rem; }
.record__meta { font-size: .78rem; color: var(--c-text-3); display: flex; gap: 10px; flex-wrap: wrap; }
.record__excerpt { font-size: .85rem; color: var(--c-text-2); line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.record__actions { display: flex; gap: 6px; }
.badge-embed { font-size: .7rem; font-weight: 800; padding: 2px 8px; border-radius: 999px; }
.badge-embed--yes { background: var(--c-ok-l); color: var(--c-ok); }
.badge-embed--no { background: var(--c-warn-l); color: var(--c-warn); }

.pager { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 18px; font-size: .85rem; color: var(--c-text-2); }

/* ── 統計卡 ───────────────────────────────────────────────────────────── */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat {
  background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--r-md);
  padding: 14px 16px;
}
.stat__k { display: block; font-size: .74rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; color: var(--c-text-3); }
.stat__v { display: block; font-size: 1.3rem; font-weight: 800; color: var(--c-primary-d); overflow-wrap: anywhere; }
.stat--ok .stat__v { color: var(--c-ok); }
.stat--warn .stat__v { color: var(--c-warn); }
.stat--bad .stat__v { color: var(--c-danger); }

.progress-bar { height: 9px; border-radius: 999px; background: var(--c-border); overflow: hidden; }
.progress-bar__fill { height: 100%; background: linear-gradient(90deg, var(--c-primary), #7c3aed); transition: width .3s; }

/* ── 對話框 ───────────────────────────────────────────────────────────── */
.modal { position: fixed; inset: 0; z-index: 150; display: flex; align-items: center; justify-content: center; padding: 20px; background: rgba(16,24,40,.5); }
.modal__box { width: min(760px, 100%); max-height: 90vh; display: flex; flex-direction: column; background: var(--c-surface); border-radius: var(--r-xl); box-shadow: var(--sh-3); overflow: hidden; }
.modal__head { display: flex; align-items: center; justify-content: space-between; padding: 16px 22px; border-bottom: 1px solid var(--c-border); }
.modal__head h3 { margin: 0; }
.modal__body { padding: 20px 22px; overflow-y: auto; }
.modal__foot { display: flex; gap: 10px; padding: 14px 22px; border-top: 1px solid var(--c-border); background: var(--c-surface-2); }

/* ── 響應式 ───────────────────────────────────────────────────────────── */
@media (max-width: 1020px) {
  /* minmax(0,1fr) 而非 1fr：1fr 的最小值是 auto，橫向導覽會把整頁撐寬 */
  .admin-body { grid-template-columns: minmax(0, 1fr); }
  .admin-nav { position: static; flex-direction: row; overflow-x: auto; padding-bottom: 4px; min-width: 0; }
  .admin-nav__item { flex: 0 0 auto; border-left: 0; border-bottom: 3px solid transparent; }
  .admin-nav__item.is-active { border-left: 0; border-bottom-color: var(--c-primary); }
  .prompt-layout { grid-template-columns: 1fr; }
  .prompt-tabs { flex-direction: row; overflow-x: auto; }
}
@media (max-width: 700px) {
  .mapping-row { grid-template-columns: 1fr; gap: 4px; }
  .mapping-row__arrow { display: none; }
  .panel__body, .panel__head { padding-left: 16px; padding-right: 16px; }
}