/* 漢語史語料檢索系統 — 古風單頁 */
:root {
  --paper: #f5efe0;
  --paper-deep: #ede4cf;
  --ink: #3a2e28;
  --ink-soft: #6b5d50;
  --line: #d8c9a8;
  --seal: #b03a2e;
  --seal-soft: #f3e3d3;
  --tang: #3a5a68;   /* 墨青（唐） */
  --song: #b03a2e;   /* 朱砂（宋） */
  --serif: "Songti SC", "STSong", "SimSun", "Noto Serif CJK SC", serif;
  --kaiti: "Kaiti SC", "STKaiti", "KaiTi", "Noto Serif CJK SC", serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.7;
  background:
    radial-gradient(ellipse at 18% 6%, rgba(210, 190, 150, .18), transparent 55%),
    radial-gradient(ellipse at 85% 12%, rgba(200, 175, 130, .14), transparent 50%),
    var(--paper);
  min-height: 100vh;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 18px 64px; }

/* ---------- 頂欄 ---------- */
header.top {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 0 10px; border-bottom: 2px solid var(--ink);
}
.seal {
  flex: 0 0 auto; width: 46px; height: 46px;
  background: var(--seal); color: #f8f1e2;
  font-family: var(--kaiti); font-size: 22px; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  writing-mode: vertical-rl; letter-spacing: 2px;
  border-radius: 3px; transform: rotate(-2deg);
  box-shadow: 1px 2px 4px rgba(58,46,40,.25);
  user-select: none;
}
h1.title { font-family: var(--kaiti); font-size: 26px; margin: 0; font-weight: 600; letter-spacing: 2px; }
.subtitle { font-size: 12.5px; color: var(--ink-soft); margin-top: 2px; }
.top-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.top-actions button {
  font-family: var(--serif); font-size: 13px; color: var(--ink);
  background: transparent; border: 1px solid var(--line); border-radius: 3px;
  padding: 3px 10px; cursor: pointer;
}
.top-actions button:hover { border-color: var(--seal); color: var(--seal); }

/* ---------- 檢索面板 ---------- */
.query-panel {
  background: rgba(255, 252, 244, .72);
  border: 1px solid var(--line); border-radius: 6px;
  padding: 14px 16px 12px; margin-top: 14px;
  box-shadow: 0 1px 6px rgba(90, 70, 40, .07);
}
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.tab {
  font-family: var(--kaiti); font-size: 15px; padding: 5px 18px; cursor: pointer;
  border: 1px solid transparent; border-bottom: none; border-radius: 4px 4px 0 0;
  color: var(--ink-soft); background: transparent;
}
.tab.active { color: var(--seal); background: var(--paper); border-color: var(--line); font-weight: 600; }
.input-row { display: flex; gap: 8px; }
.q-input {
  flex: 1; font-family: var(--serif); font-size: 16px; color: var(--ink);
  background: #fffdf6; border: 1px solid var(--line); border-radius: 4px;
  padding: 9px 12px; outline: none;
}
.q-input:focus { border-color: var(--seal); }
.btn {
  font-family: var(--kaiti); font-size: 15px; color: #f8f1e2;
  background: var(--seal); border: none; border-radius: 4px;
  padding: 8px 26px; cursor: pointer; letter-spacing: 3px;
}
.btn:hover { filter: brightness(1.1); }
.btn:disabled { opacity: .5; cursor: default; }
.q-options { display: flex; align-items: center; gap: 12px; margin-top: 9px; flex-wrap: wrap; font-size: 13.5px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.seg button {
  font-family: var(--serif); font-size: 13.5px; padding: 3px 12px; cursor: pointer;
  background: transparent; border: none; border-right: 1px solid var(--line); color: var(--ink-soft);
}
.seg button:last-child { border-right: none; }
.seg button.active { background: var(--seal); color: #f8f1e2; }
.chk { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; color: var(--ink-soft); white-space: nowrap; }
/* 語料名稱懸停 tooltip（data-desc，CSS-only） */
.chk[data-desc] { position: relative; }
.chk[data-desc]:hover::after {
  content: attr(data-desc);
  position: absolute; bottom: calc(100% + 8px); left: 0;
  width: 260px; padding: 8px 11px; border-radius: 6px;
  background: var(--ink); color: #f5efe0;
  font-size: 12.5px; line-height: 1.65; white-space: normal;
  box-shadow: 0 3px 10px rgba(0, 0, 0, .28);
  z-index: 200; pointer-events: none;
}
details.adv { margin-top: 9px; }
details.adv summary { cursor: pointer; color: var(--ink-soft); font-size: 13.5px; user-select: none; }
.adv-grid { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 9px; padding-top: 9px; border-top: 1px dashed var(--line); }
.adv-item { display: flex; align-items: center; gap: 6px; font-size: 13.5px; flex-wrap: wrap; }
.adv-item > label { color: var(--ink-soft); white-space: nowrap; }
.adv-item input[type=text], .adv-item input[type=number], .adv-item select {
  font-family: var(--serif); font-size: 13.5px; color: var(--ink);
  background: #fffdf6; border: 1px solid var(--line); border-radius: 3px; padding: 3px 7px;
}
.adv-item input[type=number] { width: 74px; }
.era-chips { display: flex; gap: 5px; flex-wrap: wrap; }
.era-chip {
  font-size: 13px; padding: 2px 10px; cursor: pointer; user-select: none;
  border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); background: transparent;
}
.era-chip.on { background: var(--seal); color: #f8f1e2; border-color: var(--seal); }
.mini-btn {
  font-size: 13px; padding: 3px 12px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 3px; background: transparent; color: var(--ink);
  font-family: var(--serif);
}
.mini-btn:hover { border-color: var(--seal); color: var(--seal); }

/* 句式構建器 */
.builder { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; align-items: center; }
.builder .chip {
  font-size: 12.5px; padding: 2px 9px; cursor: pointer; user-select: none;
  border: 1px solid var(--line); border-radius: 3px; background: #fffdf6; color: var(--ink);
}
.builder .chip:hover { border-color: var(--seal); color: var(--seal); }
.builder .chip .t { color: var(--seal); font-weight: 600; }
.compile-preview { margin-top: 7px; font-size: 12.5px; color: var(--ink-soft); word-break: break-all; }
.compile-preview .ok { color: var(--tang); }
.compile-preview .err { color: var(--seal); }

/* ---------- 課堂任務 ---------- */
.tasks { margin-top: 14px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255, 252, 244, .72); }
.tasks > summary {
  cursor: pointer; padding: 9px 16px; font-family: var(--kaiti); font-size: 16px;
  color: var(--seal); user-select: none; letter-spacing: 1px;
}
.task-group { border-top: 1px dashed var(--line); padding: 8px 16px 12px; }
.task-group summary { cursor: pointer; font-family: var(--kaiti); font-size: 14.5px; color: var(--ink); user-select: none; }
.task-items { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 7px; }
.task-chip {
  font-size: 13px; padding: 3px 12px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 3px; background: transparent; color: var(--ink);
  font-family: var(--serif);
}
.task-chip:hover { background: var(--seal); color: #f8f1e2; border-color: var(--seal); }
.task-desc { font-size: 12px; color: var(--ink-soft); margin-top: 5px; }
/* 詞表速查（課堂任務章節內，點詞即檢索） */
.lex-box { margin-top: 6px; }
.lex-box > summary { font-size: 12px; color: var(--ink-soft); cursor: pointer; user-select: none; }
.lex-group { margin: 7px 0 3px; }
.lex-name { font-size: 11.5px; color: var(--ink-soft); margin: 4px 0 3px; }
.lex-words { display: flex; flex-wrap: wrap; gap: 4px; max-height: 150px; overflow-y: auto; padding-right: 2px; }
.lex-chip {
  font-size: 13px; line-height: 1.5; padding: 1px 9px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 11px; background: #fff; color: var(--ink);
  font-family: var(--serif);
}
.lex-chip:hover { border-color: var(--seal); color: var(--seal); }
.lex-chip i { font-style: normal; font-size: 10px; color: var(--ink-soft); opacity: .75; margin-left: 3px; }
.lex-chip.hide { display: none; }
.lex-filt { display: flex; gap: 4px; margin: 4px 0 2px; }
.lex-filt-btn {
  font-size: 11.5px; line-height: 1.4; padding: 0 8px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 9px; background: #fff; color: var(--ink-soft);
}
.lex-filt-btn.on { border-color: var(--seal); color: var(--seal); font-weight: 600; }

/* ---------- 統計 ---------- */
.panel { margin-top: 14px; border: 1px solid var(--line); border-radius: 6px; background: rgba(255, 252, 244, .72); padding: 12px 16px; }
.panel h2 { font-family: var(--kaiti); font-size: 16.5px; margin: 0 0 8px; color: var(--ink); letter-spacing: 1px; }
details.panel { padding: 10px 16px 12px; }
.stats-summary { display: flex; align-items: baseline; gap: 12px; cursor: pointer; user-select: none; flex-wrap: wrap; list-style: none; }
.stats-summary::-webkit-details-marker { display: none; }
.stats-title { font-family: var(--kaiti); font-size: 16.5px; letter-spacing: 1px; color: var(--seal); flex: 0 0 auto; }
.stats-summary .summary-line { margin: 0; }
.stats-summary::after { content: '▾'; color: var(--ink-soft); font-size: 12px; margin-left: auto; }
details.panel[open] .stats-summary::after { content: '▴'; }
.summary-line { font-size: 13.5px; color: var(--ink-soft); margin-bottom: 8px; }
.summary-line b { color: var(--seal); }
.per1000-row { display: flex; align-items: center; gap: 10px; margin: 5px 0; font-size: 13.5px; flex-wrap: wrap; }
.per1000-label { flex: 0 0 34px; font-weight: 600; }
.per1000-track { flex: 1; min-width: 160px; height: 18px; background: var(--paper-deep); border-radius: 3px; overflow: hidden; }
.per1000-fill { height: 100%; border-radius: 3px; transition: width .4s; }
.per1000-val { flex: 0 0 auto; color: var(--ink-soft); font-size: 12.5px; }
.hbars { display: flex; flex-wrap: wrap; gap: 14px 34px; }
.hbar-col { flex: 1 1 240px; min-width: 210px; }
.hbar-col h3 { font-size: 13.5px; margin: 4px 0 6px; color: var(--ink-soft); font-weight: 600; }
.hbar-row { display: flex; align-items: center; gap: 7px; margin: 3px 0; font-size: 13px; }
.hbar-label { flex: 0 0 auto; min-width: 74px; max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hbar-track { flex: 1; height: 11px; background: var(--paper-deep); border-radius: 2px; overflow: hidden; }
.hbar-fill { height: 100%; border-radius: 2px; transition: width .4s; }
.hbar-val { flex: 0 0 auto; color: var(--ink-soft); font-size: 12px; width: 34px; text-align: right; }

/* ---------- 搭配 ---------- */
.colloc-controls { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; font-size: 13.5px; flex-wrap: wrap; }
.colloc-chips { display: flex; flex-wrap: wrap; gap: 5px; }
.colloc-chip {
  font-size: 13px; padding: 2px 10px; cursor: pointer;
  border: 1px solid var(--line); border-radius: 3px; background: #fffdf6;
}
.colloc-chip:hover { border-color: var(--seal); color: var(--seal); }
.colloc-chip .n { color: var(--seal); font-size: 12px; margin-left: 3px; }

/* ---------- 結果 ---------- */
.compare-cols { display: flex; gap: 14px; align-items: flex-start; }
.compare-col { flex: 1 1 0; min-width: 0; }
.compare-col h2.col-title { font-family: var(--kaiti); font-size: 17px; margin: 0 0 8px; letter-spacing: 1px; }
.col-title.tang { color: var(--tang); }
.col-title.song { color: var(--song); }
.result-card {
  border: 1px solid var(--line); border-radius: 5px; background: #fffdf6;
  padding: 10px 13px; margin-bottom: 9px;
}
.card-head { display: flex; align-items: baseline; gap: 7px; flex-wrap: wrap; font-size: 14px; }
.dyn-badge { font-size: 12px; padding: 0 7px; border-radius: 2px; color: #fff; }
.dyn-badge.tang { background: var(--tang); }
.dyn-badge.song { background: var(--song); }
.card-author { font-weight: 600; }
.card-title { color: var(--ink-soft); }
.card-sub { color: var(--ink-soft); font-size: 12.5px; }
.card-meta { color: var(--ink-soft); font-size: 12.5px; }
.card-expand { margin-left: auto; font-size: 12.5px; color: var(--tang); cursor: pointer; user-select: none; }
.card-expand:hover { text-decoration: underline; }
.hit-line { font-size: 15px; margin: 4px 0; }
.hit-line mark { background: var(--seal-soft); color: var(--seal); padding: 0 1px; font-weight: 600; }
.hit-more { font-size: 12px; color: var(--ink-soft); }
.full-text { margin-top: 7px; padding-top: 7px; border-top: 1px dashed var(--line); font-size: 14px; white-space: pre-wrap; display: none; }
.result-card.open .full-text { display: block; }
.result-card.open .hit-line { display: none; }
.result-card.open .hit-more { display: none; }
.pager { display: flex; align-items: center; gap: 10px; margin: 10px 0 0; font-size: 13.5px; flex-wrap: wrap; }
.pager button { font-family: var(--serif); font-size: 13px; padding: 3px 13px; cursor: pointer; border: 1px solid var(--line); border-radius: 3px; background: transparent; color: var(--ink); }
.pager button:disabled { opacity: .4; cursor: default; }
.pager .info { color: var(--ink-soft); }
.empty-note { color: var(--ink-soft); padding: 18px 0; text-align: center; }
.note { color: var(--ink-soft); font-size: 12.5px; margin-top: 6px; }

/* ---------- 對話框 ---------- */
dialog.modal {
  border: 1px solid var(--line); border-radius: 6px; background: var(--paper);
  color: var(--ink); max-width: 640px; width: calc(100vw - 40px); max-height: 82vh;
  padding: 0; font-family: var(--serif);
}
dialog.modal::backdrop { background: rgba(40, 30, 20, .45); }
.modal-head { display: flex; align-items: center; padding: 12px 18px; border-bottom: 1px solid var(--line); position: sticky; top: 0; background: var(--paper); }
.modal-head h3 { font-family: var(--kaiti); font-size: 17px; margin: 0; letter-spacing: 1px; }
.modal-close { margin-left: auto; cursor: pointer; font-size: 18px; color: var(--ink-soft); background: none; border: none; }
.modal-body { padding: 12px 18px 20px; overflow-y: auto; font-size: 14px; }
.modal-body h4 { font-family: var(--kaiti); margin: 14px 0 5px; font-size: 15px; }
.modal-body table { border-collapse: collapse; font-size: 13px; }
.modal-body td, .modal-body th { border: 1px solid var(--line); padding: 4px 9px; text-align: left; }
.modal-body code { background: var(--paper-deep); padding: 0 4px; border-radius: 3px; font-size: 13px; }

/* ---------- 頁腳 ---------- */
footer.footer {
  margin-top: 26px; padding-top: 12px; border-top: 1px solid var(--line);
  text-align: center; font-family: var(--kaiti); font-size: 13.5px;
  color: var(--ink-soft); letter-spacing: 2px;
}

/* ---------- 響應式（PC / 平板 / 手機） ---------- */
/* 平板（641-900px）：單欄、加大觸控目標 */
@media (min-width: 641px) and (max-width: 900px) {
  .compare-cols { flex-direction: column; }
  .wrap { padding: 0 22px 56px; }
  body { font-size: 15.5px; }
  .task-chip, .colloc-chip, .era-chip { padding: 5px 14px; font-size: 14px; }
  .seg button { padding: 5px 16px; font-size: 14px; }
  .mini-btn { padding: 5px 16px; font-size: 14px; }
  .q-input { font-size: 17px; padding: 11px 14px; }
  .btn { padding: 10px 34px; font-size: 16px; }
  .adv-item input[type=text], .adv-item input[type=number] { padding: 6px 9px; font-size: 15px; }
}
/* 手機（≤640px）：堆疊、16px 輸入防 iOS 聚焦縮放、全寬按鈕 */
@media (max-width: 640px) {
  .compare-cols { flex-direction: column; }
  .wrap { padding: 0 14px 48px; }
  h1.title { font-size: 19px; letter-spacing: 1px; }
  .subtitle { font-size: 11.5px; line-height: 1.5; }
  header.top { flex-wrap: wrap; gap: 10px; }
  .seal { width: 40px; height: 40px; font-size: 19px; }
  .top-actions { margin-left: 0; width: 100%; justify-content: flex-start; }
  .input-row { flex-direction: column; }
  .q-input { font-size: 16px; padding: 11px 12px; }
  .btn { padding: 11px 0; width: 100%; }
  .q-options { gap: 8px 14px; }
  .seg button { padding: 5px 13px; }
  .adv-item input[type=text], .adv-item input[type=number], .adv-item select { font-size: 16px; padding: 6px 8px; }
  .adv-item input[type=text] { width: 100%; }
  .task-chip, .colloc-chip { padding: 6px 13px; font-size: 14px; }
  .colloc-chip .n { font-size: 13px; }
  .era-chip { padding: 5px 12px; font-size: 14px; }
  .card-head { font-size: 15px; }
  .hit-line { font-size: 16px; }
  .pager { justify-content: center; }
  .stats-summary { gap: 6px; }
  .hbars { gap: 10px 0; }
  .modal-body table { font-size: 12px; }
  .modal-body { padding: 10px 12px 16px; }
}
.modal-body { overflow-x: hidden; }
.table-wrap { overflow-x: auto; }

/* ---------- 語料勾選 / 遞進鏈 / 構建器提示 ---------- */
.opt-label { color: var(--ink-soft); font-size: 13.5px; }
.corpus-acts { display: inline-flex; gap: 6px; margin-right: 4px; }
.corpus-checks { display: flex; flex-wrap: wrap; gap: 8px 12px; }
.chk-count { font-size: 11px; color: var(--ink-soft); margin-left: 2px; }
.builder-hint { margin-top: 6px; font-size: 12.5px; color: var(--ink-soft); line-height: 1.6; }
#refine-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 2px 0 10px; font-size: 13px; }
.refine-chip {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid var(--line); border-radius: 3px; padding: 2px 9px; background: #fffdf6;
}
.refine-chip b { color: var(--seal); }
.refine-chip.refine-base { border-style: dashed; cursor: pointer; }
.refine-chip.refine-base:hover { border-color: var(--seal); color: var(--seal); }
.refine-x { cursor: pointer; color: var(--ink-soft); font-size: 11px; padding: 0 2px; }
.refine-x:hover { color: var(--seal); }
.refine-arrow { color: var(--ink-soft); }

.seg button:disabled { opacity: .35; cursor: default; }

.pager .page-input { width: 58px; font-family: var(--serif); font-size: 13px; text-align: center; background: #fffdf6; border: 1px solid var(--line); border-radius: 3px; padding: 2px 4px; }

/* ---------- 智能模式 ---------- */
.smart-box { border: 1px solid var(--line); border-left: 3px solid var(--tang); background: #fffdf6; border-radius: 4px; padding: 9px 12px; margin: 2px 0 12px; font-size: 13.5px; }
.smart-box-err { border-left-color: var(--seal); }
.smart-head { font-weight: 600; color: var(--ink); margin-bottom: 4px; }
.smart-hint { font-size: 12px; color: var(--ink-soft); font-weight: normal; margin-left: 8px; }
.smart-code { font-family: var(--serif); color: var(--seal); background: var(--paper-deep); border-radius: 3px; padding: 4px 9px; margin: 4px 0; word-break: break-all; }
.smart-desc { color: var(--ink-soft); font-size: 12.5px; margin-top: 3px; }

.dyn-badge.prose { background: #5a7a58; } /* 散文（漢）石綠 */

/* ---------- 语料操作 / 卡片动作 / toast ---------- */
.corpus-act { font-size: 12px; padding: 1px 9px; cursor: pointer; border: 1px solid var(--line); border-radius: 3px; background: transparent; color: var(--ink-soft); font-family: var(--serif); }
.corpus-act:hover { border-color: var(--seal); color: var(--seal); }
.corpus-act.corpus-group { border-style: dashed; }
.corpus-act.corpus-group:hover { background: #fffdf6; }
.card-actions { margin-left: auto; display: inline-flex; align-items: center; gap: 10px; }
.card-act { font-size: 12.5px; color: var(--tang); cursor: pointer; user-select: none; }
.card-act:hover { text-decoration: underline; }
#toast { position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%); background: var(--ink); color: #f8f1e2; font-size: 13.5px; padding: 7px 20px; border-radius: 4px; z-index: 99; opacity: .92; }