/* ========== 資治通鑑可視化 · 東方古典信息圖風格 ========== */
:root {
  --paper: #f5f0e6;
  --paper-2: #ede6d4;
  --paper-3: #e4dbc4;
  --ink: #2b2926;
  --ink-soft: #57534b;
  --ink-faint: #8a8478;
  --cinnabar: #9e2b25;
  --cinnabar-soft: #b4554e;
  --cinnabar-bg: #f3e4dd;
  --gold: #b9975b;
  --gold-faint: #d8c9a3;
  --line: #d9cfb6;
  --card: #faf6ec;
  --shadow: 0 1px 3px rgba(60, 50, 30, .10), 0 4px 14px rgba(60, 50, 30, .06);
  --serif: "Songti SC", "STSong", "STZhongsong", "SimSun", serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background:
    radial-gradient(ellipse at 20% 0%, rgba(185, 151, 91, .06), transparent 55%),
    radial-gradient(ellipse at 85% 100%, rgba(158, 43, 37, .04), transparent 50%),
    var(--paper);
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--cinnabar); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 頁頭 ---------- */
#site-header {
  border-bottom: 1px solid var(--gold-faint);
  background: linear-gradient(to bottom, rgba(250, 246, 236, .95), rgba(245, 240, 230, .85));
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(4px);
}
.header-inner {
  max-width: 1180px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { text-decoration: none; }
.seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; flex: none;
  background: var(--cinnabar); color: #f7efe2;
  font-size: 17px; line-height: 1.05; text-align: center;
  border-radius: 6px;
  box-shadow: inset 0 0 0 2px rgba(247, 239, 226, .55), 0 1px 3px rgba(80, 20, 15, .35);
  letter-spacing: 0;
  transform: rotate(-2deg);
}
.brand-title { display: block; font-size: 24px; font-weight: 700; letter-spacing: 8px; }
.brand-sub { display: block; font-size: 12px; color: var(--ink-faint); letter-spacing: 3px; }
#main-nav { display: flex; gap: 4px; margin-left: auto; flex-wrap: wrap; }
#main-nav a {
  color: var(--ink-soft); font-size: 16px; letter-spacing: 4px;
  padding: 6px 12px; border-bottom: 2px solid transparent;
}
#main-nav a:hover { color: var(--cinnabar); text-decoration: none; }
#main-nav a.active { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }

main#view { flex: 1; max-width: 1180px; width: 100%; margin: 0 auto; padding: 28px 20px 48px; outline: none; }

#site-footer {
  border-top: 1px solid var(--gold-faint);
  color: var(--ink-faint); font-size: 12.5px; letter-spacing: 2px;
  text-align: center; padding: 16px;
}

/* ---------- 通用組件 ---------- */
.view-title {
  font-size: 22px; letter-spacing: 6px; margin: 0 0 4px;
  display: flex; align-items: baseline; gap: 12px;
}
.view-title::after { content: ""; flex: 1; height: 1px; background: linear-gradient(to right, var(--gold), transparent); }
.view-desc { color: var(--ink-faint); font-size: 13.5px; margin: 0 0 20px; letter-spacing: 1px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 4px;
  box-shadow: var(--shadow);
  padding: 16px 20px;
}

.loading, .empty, .error-box {
  text-align: center; color: var(--ink-faint);
  padding: 56px 20px; letter-spacing: 4px; font-size: 15px;
}
.loading::before {
  content: ""; display: block; margin: 0 auto 14px;
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--gold-faint); border-top-color: var(--cinnabar);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error-box { color: var(--cinnabar); }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; }
.chip {
  font-family: var(--serif); font-size: 14px; letter-spacing: 2px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-soft);
  border-radius: 999px; padding: 3px 14px; cursor: pointer;
}
.chip:hover { border-color: var(--gold); color: var(--ink); }
.chip.active { background: var(--cinnabar); border-color: var(--cinnabar); color: #f7efe2; }

.btn {
  font-family: var(--serif); font-size: 15px; letter-spacing: 3px; cursor: pointer;
  background: var(--cinnabar); color: #f7efe2; border: 1px solid var(--cinnabar);
  border-radius: 4px; padding: 7px 22px;
}
.btn:hover { background: #8a241f; }
.btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--gold); color: var(--ink); }

input[type="search"], input[type="text"], select {
  font-family: var(--serif); font-size: 15px; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 7px 12px; outline: none;
}
input:focus, select:focus { border-color: var(--gold); }
select { max-width: 100%; }

mark { background: #f0d9a8; color: inherit; padding: 0 1px; border-radius: 2px; }

.muted { color: var(--ink-faint); }
.small { font-size: 13px; }

/* ---------- 總覽 ---------- */
.hero { text-align: center; padding: 34px 0 26px; position: relative; }
.hero h1 {
  font-size: clamp(38px, 6vw, 60px); margin: 0; letter-spacing: 22px;
  text-indent: 22px; font-weight: 700;
}
.hero .tagline {
  margin: 12px 0 0; color: var(--ink-soft); font-size: 17px; letter-spacing: 6px;
}
.hero .tagline em { color: var(--cinnabar); font-style: normal; }
.hero-rule {
  width: 220px; height: 1px; margin: 20px auto 0;
  background: linear-gradient(to right, transparent, var(--gold), transparent);
  position: relative;
}
.hero-rule::after {
  content: "◆"; position: absolute; left: 50%; top: 50%;
  transform: translate(-50%, -50%); font-size: 8px; color: var(--gold);
}

.stat-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px; margin: 26px 0 34px;
}
.stat-card {
  text-align: center; padding: 18px 10px 14px;
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  box-shadow: var(--shadow); position: relative;
}
.stat-card::before {
  content: ""; position: absolute; top: 0; left: 12%; right: 12%; height: 2px;
  background: linear-gradient(to right, transparent, var(--gold), transparent);
}
.stat-num { font-size: 34px; color: var(--cinnabar); font-weight: 700; letter-spacing: 1px; }
.stat-num .unit { font-size: 15px; color: var(--ink-faint); margin-left: 4px; }
.stat-label { font-size: 13.5px; color: var(--ink-soft); letter-spacing: 4px; margin-top: 2px; }

.panel { margin-bottom: 34px; }
.panel h2 {
  font-size: 18px; letter-spacing: 5px; margin: 0 0 4px; font-weight: 700;
  display: flex; align-items: baseline; gap: 10px;
}
.panel h2 .en { font-size: 11px; color: var(--gold); letter-spacing: 2px; font-weight: 400; }
.panel h2::after { content: ""; flex: 1; height: 1px; background: var(--gold-faint); }
.panel .hint { font-size: 12.5px; color: var(--ink-faint); margin: 0 0 12px; letter-spacing: 1px; }

/* d3 通用 */
.axis text { font-family: var(--serif); fill: var(--ink-faint); font-size: 11.5px; }
.axis line, .axis path { stroke: var(--line); }
.band-label { font-family: var(--serif); fill: var(--ink-soft); letter-spacing: 2px; pointer-events: none; }
.dyn-band { cursor: pointer; stroke: var(--paper); stroke-width: 1; }
.dyn-band:hover { opacity: .82; }

/* ---------- 編年 ---------- */
.chronicle-chart-wrap { background: var(--card); border: 1px solid var(--line); border-radius: 4px; box-shadow: var(--shadow); padding: 14px 16px 6px; }
.chart-note { font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 6px; }
.chart-note .dot-key::before {
  content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--cinnabar); margin-right: 5px; vertical-align: 1px;
}
.year-detail { margin-top: 22px; }
.year-meta {
  border-left: 3px solid var(--cinnabar); padding: 4px 14px; margin-bottom: 14px;
  background: linear-gradient(to right, var(--cinnabar-bg), transparent 70%);
}
.year-meta .yl { font-size: 19px; letter-spacing: 2px; }
.year-meta .ym { color: var(--ink-faint); font-size: 13px; letter-spacing: 1px; }

/* ---------- 事件/閱讀共用的塊排版 ---------- */
.block {
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 14px 18px; margin-bottom: 12px; box-shadow: var(--shadow);
}
.block .block-head { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; margin-bottom: 6px; }
.block .bno {
  font-size: 12px; color: var(--gold); border: 1px solid var(--gold-faint);
  border-radius: 3px; padding: 0 6px; letter-spacing: 1px;
}
.block .btext { margin: 0; text-align: justify; }
.block .btext p { margin: 0 0 .5em; }
.block .btext p:last-child { margin-bottom: 0; }
.block.commentary {
  border-left: 4px solid var(--cinnabar);
  background: linear-gradient(to right, var(--cinnabar-bg), var(--card) 55%);
}
.block .speaker {
  color: var(--cinnabar); font-weight: 700; letter-spacing: 2px; font-size: 14.5px;
}
.notes-toggle {
  font-family: var(--serif); font-size: 12px; cursor: pointer;
  color: var(--gold); background: none; border: 1px solid var(--gold-faint);
  border-radius: 3px; padding: 0 7px; letter-spacing: 1px;
}
.notes-toggle:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.notes-list {
  display: none; margin: 10px 0 0; padding: 10px 14px;
  border-top: 1px dashed var(--gold-faint);
  font-size: 13.5px; color: var(--ink-soft); list-style: none;
}
.notes-list.open { display: block; }
.notes-list li { margin-bottom: 6px; padding-left: 14px; position: relative; }
.notes-list li::before { content: "校"; position: absolute; left: 0; color: var(--gold); font-size: 11px; top: 3px; }

/* ---------- 人物 ---------- */
.person-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 14px; }
.person-card { cursor: pointer; transition: transform .12s ease; }
.person-card:hover { transform: translateY(-2px); }
.person-card .pname { font-size: 20px; letter-spacing: 3px; }
.person-card .pcount { color: var(--cinnabar); font-size: 22px; font-weight: 700; }
.person-card .pmeta { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 1px; }
.person-card .spark { margin-top: 8px; }
.person-toolbar { display: flex; gap: 12px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }

.rel-chip {
  display: inline-block; margin: 0 8px 8px 0; padding: 3px 14px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--card);
  cursor: pointer; font-size: 14px; letter-spacing: 1px;
}
.rel-chip:hover { border-color: var(--cinnabar); color: var(--cinnabar); }
.rel-chip .w { color: var(--ink-faint); font-size: 12px; margin-left: 6px; }

.back-link { display: inline-block; margin-bottom: 14px; letter-spacing: 2px; }

/* ---------- 事件 ---------- */
.search-bar { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.search-bar input { flex: 1; min-width: 220px; }
.search-result-meta { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 1px; }
.tag-type {
  font-size: 11.5px; border-radius: 3px; padding: 0 6px; letter-spacing: 1px;
  border: 1px solid var(--line); color: var(--ink-faint);
}
.tag-type.comm { color: var(--cinnabar); border-color: var(--cinnabar-soft); }

/* ---------- 關係圖 ---------- */
.graph-wrap { background: var(--card); border: 1px solid var(--line); border-radius: 4px; box-shadow: var(--shadow); overflow: hidden; }
.graph-wrap svg { display: block; width: 100%; }
.g-node { cursor: pointer; }
.g-label { font-family: var(--serif); pointer-events: none; fill: var(--ink); }

/* ---------- 閱讀 ---------- */
.reader-layout { display: grid; grid-template-columns: 220px 1fr; gap: 22px; align-items: start; }
.reader-toc {
  position: sticky; top: 86px; max-height: calc(100vh - 120px); overflow: auto;
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 12px 14px; font-size: 13.5px;
}
.reader-toc .toc-king { color: var(--cinnabar); letter-spacing: 2px; margin: 10px 0 2px; font-size: 14px; }
.reader-toc .toc-king:first-child { margin-top: 0; }
.reader-toc a { display: block; color: var(--ink-soft); padding: 1px 0 1px 10px; letter-spacing: 1px; }
.reader-toc a:hover { color: var(--cinnabar); text-decoration: none; }
.reader-head { margin-bottom: 18px; }
.reader-head h3 { margin: 0 0 2px; font-size: 24px; letter-spacing: 5px; }
.reader-head .span { color: var(--ink-faint); font-size: 13px; letter-spacing: 1px; }
.year-anchor { scroll-margin-top: 90px; }
.year-heading {
  font-size: 17px; letter-spacing: 2px; color: var(--ink);
  border-bottom: 1px solid var(--gold-faint); padding-bottom: 4px; margin: 26px 0 12px;
}
.year-heading .gz { color: var(--gold); font-size: 13.5px; margin-left: 10px; }
.king-heading {
  font-size: 19px; letter-spacing: 4px; color: var(--cinnabar); margin: 30px 0 8px;
  padding-left: 12px; border-left: 3px solid var(--cinnabar);
}

/* ---------- 關係 · 模式切換與時序事件鏈 ---------- */
.mode-tabs { display: flex; gap: 0; margin-bottom: 18px; border-bottom: 1px solid var(--gold-faint); }
.mode-tab {
  font-family: var(--serif); font-size: 15px; letter-spacing: 3px; cursor: pointer;
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--ink-soft); padding: 6px 22px;
}
.mode-tab:hover { color: var(--cinnabar); }
.mode-tab.active { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }

.tl-filter { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.tl-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.focus-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 3px 8px 3px 14px; border-radius: 999px;
  color: #f7efe2; font-size: 14px; letter-spacing: 1px;
}
.focus-chip .x {
  cursor: pointer; opacity: .75; background: none; border: none;
  color: inherit; font-family: inherit; font-size: 15px; padding: 0 2px;
}
.focus-chip .x:hover { opacity: 1; }
.tl-ac-wrap { position: relative; flex: 1; min-width: 220px; max-width: 340px; }
.tl-ac-wrap input { width: 100%; }
.tl-ac-list {
  position: absolute; top: calc(100% + 4px); left: 0; right: 0; z-index: 30;
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  box-shadow: var(--shadow); max-height: 260px; overflow: auto;
}
.tl-ac-item { padding: 5px 12px; cursor: pointer; font-size: 14.5px; }
.tl-ac-item:hover { background: var(--paper-2); }

.tl-layout { display: grid; grid-template-columns: 1fr 320px; gap: 18px; align-items: start; }
.tl-chart { padding: 10px 12px 4px; overflow: hidden; }
.tl-note { font-size: 12px; color: var(--ink-faint); letter-spacing: 1px; margin-top: 8px; line-height: 1.7; }
.lane-label { font-family: var(--serif); }
.tl-node:hover circle, .tl-node:hover rect { stroke: var(--cinnabar); stroke-width: 2; }

.tl-sidebar { position: sticky; top: 86px; max-height: calc(100vh - 120px); overflow: auto; }
.tl-side-title {
  font-size: 16px; letter-spacing: 2px; margin: 12px 0 4px; color: var(--ink);
  border-bottom: 1px solid var(--gold-faint); padding-bottom: 4px;
}
.tl-side-title:first-child { margin-top: 0; }
.tl-summary { font-size: 14.5px; text-align: justify; }
.tl-chain-box { margin: 8px 0; font-size: 14px; }
.tl-chain-name { font-weight: 700; margin-right: 12px; letter-spacing: 1px; }
.factor-chip {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  border: 1px solid var(--line); border-radius: 4px; background: var(--paper);
  padding: 5px 10px; margin-bottom: 8px; font-size: 14px;
}
.factor-chip .fname { font-weight: 700; letter-spacing: 1px; }
.factor-chip .fcounts { color: var(--ink-faint); font-size: 12px; }
.factor-chip .fadd {
  margin-left: auto; font-family: var(--serif); font-size: 12px; cursor: pointer;
  background: none; border: 1px solid var(--gold-faint); border-radius: 3px;
  color: var(--gold); padding: 1px 8px; letter-spacing: 1px;
}
.factor-chip .fadd:hover { color: var(--cinnabar); border-color: var(--cinnabar); }
.factor-chip.is-focus { border-color: var(--gold-faint); background: var(--paper-2); }
.tl-aggr-item {
  border: 1px solid var(--line); border-radius: 4px; background: var(--paper);
  padding: 6px 10px; margin-bottom: 8px; font-size: 13.5px; cursor: pointer;
}
.tl-aggr-item:hover { border-color: var(--cinnabar); }

/* ---------- 響應式 ---------- */
@media (max-width: 860px) {
  .reader-layout { grid-template-columns: 1fr; }
  .reader-toc { position: static; max-height: 240px; }
  .tl-layout { grid-template-columns: 1fr; }
  .tl-sidebar { position: static; max-height: none; }
  .header-inner { gap: 12px; }
  #main-nav { margin-left: 0; }
  #main-nav a { letter-spacing: 2px; padding: 6px 8px; }
  .brand-title { letter-spacing: 4px; }
  .hero h1 { letter-spacing: 10px; text-indent: 10px; }
}