/* ============================================================
   Latticework — Business toolkit, light + dark theme
   ============================================================ */

:root,
[data-theme="light"] {
  --bg: #FAF6EE;
  --bg-2: #F5EFE3;
  --surface: #FFFFFF;
  --surface-tint: #FCFAF5;

  --ink: #1F1D1A;
  --ink-2: #4A4641;
  --ink-3: #7A746B;
  --hairline: #E5DECF;
  --border: #D9D2C3;

  --accent: #7A2330;
  --accent-soft: #9A3949;
  --gold: #B58B3C;

  --d-econ: #B58B3C;
  --d-psych: #9A4D6E;
  --d-systems: #3D6A8C;
  --d-bio: #5F7F4A;
  --d-stats: #2F6A7A;
  --d-eng: #A6553A;
  --d-phil: #5C508A;

  --shadow-sm: 0 1px 2px rgba(60, 40, 10, 0.04), 0 1px 1px rgba(60, 40, 10, 0.03);
  --shadow-md: 0 4px 16px rgba(60, 40, 10, 0.06), 0 2px 4px rgba(60, 40, 10, 0.04);
  --shadow-lg: 0 12px 40px rgba(40, 25, 5, 0.12), 0 4px 12px rgba(60, 40, 10, 0.06);

  --header-bg: rgba(250, 246, 238, 0.88);
}

[data-theme="dark"] {
  --bg: #1A1714;
  --bg-2: #221E1A;
  --surface: #2A2520;
  --surface-tint: #2F2924;

  --ink: #F2EBDD;
  --ink-2: #C9C2B5;
  --ink-3: #8C857A;
  --hairline: #3A332C;
  --border: #4C443A;

  --accent: #D87060;
  --accent-soft: #C46055;
  --gold: #D4A05A;

  --d-econ: #D4A05A;
  --d-psych: #C97398;
  --d-systems: #6FA0C5;
  --d-bio: #8DAF73;
  --d-stats: #5BA5BA;
  --d-eng: #D08163;
  --d-phil: #8B7DBE;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45), 0 2px 4px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6), 0 4px 12px rgba(0, 0, 0, 0.3);

  --header-bg: rgba(26, 23, 20, 0.88);
}

:root {
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --serif: "Noto Serif TC", "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Noto Sans TC", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SF Mono", Menlo, Consolas, monospace;

  --maxw: 1280px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.2s, color 0.2s;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-soft); text-decoration: underline; text-underline-offset: 2px; }

/* ============================================================
   Header
   ============================================================ */

.site-header {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--hairline);
  padding: 32px 32px 24px;
}
.site-header > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }

.header-row.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.brand-mark {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--accent);
}

.header-actions { display: flex; gap: 8px; align-items: center; }

.icon-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 15px;
  cursor: pointer;
  color: var(--ink-2);
  line-height: 1;
  transition: all 0.15s;
}
.icon-btn:hover { background: var(--surface); color: var(--ink); border-color: var(--ink-3); }

.theme-icon-light, .theme-icon-dark { display: none; }
[data-theme="light"] .theme-icon-dark { display: inline; }
[data-theme="dark"] .theme-icon-light { display: inline; }

.brand-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(26px, 3.5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 10px;
}

.brand-tagline {
  font-size: 14.5px;
  color: var(--ink-3);
  margin: 0 0 18px;
  max-width: 720px;
  line-height: 1.6;
}

.header-stats {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-3);
}
.stat b { color: var(--ink); font-weight: 600; margin-right: 4px; }
.stat-sep { color: var(--border); }

/* ============================================================
   Tab bar
   ============================================================ */

.tab-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--header-bg);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--hairline);
  padding: 0 32px;
  display: flex;
  gap: 0;
  max-width: var(--maxw);
  margin: 0 auto;
  overflow-x: auto;
  scrollbar-width: none;
}
.tab-bar::-webkit-scrollbar { display: none; }

.tab {
  flex-shrink: 0;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 14px 18px;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-3);
  cursor: pointer;
  transition: all 0.15s;
}
.tab:hover { color: var(--ink-2); }
.tab.is-active {
  color: var(--ink);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* ============================================================
   Controls (search, sort, chips)
   ============================================================ */

.controls {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 32px 8px;
}

.control-row {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 280px;
  max-width: 560px;
}

#search {
  width: 100%;
  padding: 10px 50px 10px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}
#search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(122, 35, 48, 0.12);
}
[data-theme="dark"] #search:focus {
  box-shadow: 0 0 0 3px rgba(216, 112, 96, 0.18);
}

.search-hint {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-3);
  background: var(--bg-2);
  padding: 3px 7px;
  border-radius: 4px;
  border: 1px solid var(--border);
  pointer-events: none;
}

.sort-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-3);
}
.sort-wrap select {
  font-family: var(--sans);
  font-size: 13.5px;
  padding: 7px 28px 7px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--ink);
  cursor: pointer;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%237A746B' d='M5 6L0 0h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.chip-group { display: flex; gap: 6px; flex-wrap: wrap; }
.chip-group.small .chip { font-size: 12.5px; padding: 5px 10px; }
.scenario-row { padding-top: 4px; }

.chip {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.chip:hover {
  border-color: var(--accent-soft);
  color: var(--ink);
  background: var(--surface);
}
.chip.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.chip.is-active .chip-count { color: var(--bg-2); opacity: 0.7; }
.chip-count { font-size: 11.5px; color: var(--ink-3); font-weight: 400; }

/* hide scenario row on views that don't use it */
body[data-view="synergy"] .scenario-row,
body[data-view="recommend"] .scenario-row,
body[data-view="evidence"] .scenario-row,
body[data-view="graph"] .scenario-row { display: none; }

body[data-view="synergy"] .control-row.primary > .sort-wrap,
body[data-view="recommend"] .control-row.primary > .sort-wrap,
body[data-view="graph"] .control-row.primary > .sort-wrap,
body[data-view="evidence"] .control-row.chips,
body[data-view="synergy"] .control-row.chips,
body[data-view="recommend"] .control-row.chips { display: none; }

/* ============================================================
   Main container
   ============================================================ */

.main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 32px 48px;
}

/* ============================================================
   View: Wall (card grid)
   ============================================================ */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 22px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-accent, var(--accent));
  opacity: 0.85;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border);
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.card-meta-left { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

.disc-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--card-accent, var(--accent));
  text-transform: uppercase;
}
.disc-badge::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--card-accent, var(--accent));
}

.tier-badge {
  font-size: 10px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 3px;
  letter-spacing: 0.04em;
}
.tier-badge.core {
  background: var(--accent);
  color: var(--bg);
}
.tier-badge.reference {
  background: var(--bg-2);
  color: var(--ink-3);
  border: 1px solid var(--border);
}

.card-id {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--ink-3);
  font-weight: 500;
}

.card-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 21px;
  line-height: 1.3;
  color: var(--ink);
  margin: 0;
  letter-spacing: -0.005em;
}
.card-title-en {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-weight: 400;
  font-size: 13.5px;
  color: var(--ink-3);
  margin: -6px 0 0;
}

.card-summary {
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-scenarios {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin: 4px 0;
}
.scenario-tag {
  font-size: 11px;
  padding: 2px 8px;
  background: var(--bg-2);
  border: 1px solid var(--hairline);
  color: var(--ink-3);
  border-radius: 999px;
}

.card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--hairline);
  margin-top: auto;
}

.case-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12.5px;
  color: var(--ink-2);
  font-weight: 500;
}
.case-pill::before { content: "▸"; color: var(--card-accent, var(--accent)); font-size: 10px; }

.read-more {
  font-size: 11.5px;
  color: var(--ink-3);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Discipline accent mapping */
.card[data-discipline="經濟學"]            { --card-accent: var(--d-econ); }
.card[data-discipline="心理學"]            { --card-accent: var(--d-psych); }
.card[data-discipline="物理學與系統"]      { --card-accent: var(--d-systems); }
.card[data-discipline="生物學與演化"]      { --card-accent: var(--d-bio); }
.card[data-discipline="統計學"]            { --card-accent: var(--d-stats); }
.card[data-discipline="工程學"]            { --card-accent: var(--d-eng); }
.card[data-discipline="哲學與邏輯"]        { --card-accent: var(--d-phil); }

/* ============================================================
   View: Table
   ============================================================ */

.table-wrap {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.table thead th {
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  text-align: left;
  padding: 12px 14px;
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  text-transform: uppercase;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.table thead th:hover { color: var(--ink); background: var(--surface-tint); }
.table thead th.sorted::after { content: " ▾"; color: var(--accent); }
.table tbody tr {
  cursor: pointer;
  border-bottom: 1px solid var(--hairline);
  transition: background 0.12s;
}
.table tbody tr:hover { background: var(--surface-tint); }
.table tbody tr:last-child { border-bottom: none; }
.table td {
  padding: 12px 14px;
  vertical-align: top;
}
.table .col-id { font-family: var(--mono); font-size: 12.5px; color: var(--ink-3); width: 50px; }
.table .col-name { font-family: var(--serif); font-weight: 600; font-size: 15.5px; min-width: 180px; }
.table .col-name-en { font-style: italic; color: var(--ink-3); font-size: 13px; }
.table .col-disc .disc-badge { font-size: 10px; }
.table .col-tier { width: 80px; }
.table .col-case { color: var(--ink-2); font-size: 13.5px; }
.table .col-scenarios { font-size: 12px; color: var(--ink-3); }
.table .col-scenarios .scenario-tag { font-size: 10.5px; padding: 1px 6px; }

/* ============================================================
   View: Evidence (case-grouped)
   ============================================================ */

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 900px) {
  .evidence-grid { grid-template-columns: 1fr 1fr; }
}
.evidence-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
}
.evidence-actor {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  color: var(--ink);
  margin: 0 0 4px;
}
.evidence-actor-meta {
  font-size: 12.5px;
  color: var(--ink-3);
  margin: 0 0 14px;
}
.evidence-list { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
.evidence-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  background: var(--surface-tint);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s;
}
.evidence-item:hover { background: var(--bg-2); border-color: var(--border); }
.evidence-item .disc-badge { font-size: 10px; flex-shrink: 0; }
.evidence-item .ev-id { font-family: var(--mono); font-size: 11.5px; color: var(--ink-3); flex-shrink: 0; }
.evidence-item .ev-name { font-weight: 500; color: var(--ink); flex: 1; }
.evidence-item .ev-anchor { font-size: 12px; color: var(--ink-3); flex-shrink: 0; }

/* ============================================================
   View: Synergy (bundle cards)
   ============================================================ */

.synergy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}
.synergy-card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  position: relative;
  overflow: hidden;
}
.synergy-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; bottom: 0;
  width: 4px;
  background: var(--accent);
}
.synergy-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.synergy-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  color: var(--ink);
  margin: 0;
}
.synergy-subtitle {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-size: 14px;
  color: var(--ink-3);
  margin: 0 0 14px;
}
.synergy-theme {
  display: inline-flex;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--bg-2);
  color: var(--accent);
  text-transform: uppercase;
  white-space: nowrap;
}
.synergy-models {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 16px;
}
.synergy-model-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-tint);
  cursor: pointer;
  transition: all 0.15s;
  font-size: 13px;
}
.synergy-model-chip:hover {
  border-color: var(--accent);
  background: var(--bg-2);
}
.synergy-model-chip .smc-id {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
}
.synergy-model-chip .smc-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--chip-accent, var(--accent));
}
.synergy-model-chip[data-discipline="經濟學"]            { --chip-accent: var(--d-econ); }
.synergy-model-chip[data-discipline="心理學"]            { --chip-accent: var(--d-psych); }
.synergy-model-chip[data-discipline="物理學與系統"]      { --chip-accent: var(--d-systems); }
.synergy-model-chip[data-discipline="生物學與演化"]      { --chip-accent: var(--d-bio); }
.synergy-model-chip[data-discipline="統計學"]            { --chip-accent: var(--d-stats); }
.synergy-model-chip[data-discipline="工程學"]            { --chip-accent: var(--d-eng); }
.synergy-model-chip[data-discipline="哲學與邏輯"]        { --chip-accent: var(--d-phil); }

.synergy-why {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  margin: 0 0 14px;
}
.synergy-case {
  background: var(--bg-2);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-2);
}
.synergy-case::before {
  content: "案例 · ";
  font-family: var(--serif);
  font-weight: 600;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* ============================================================
   View: Recommend
   ============================================================ */

.recommend-wrap { max-width: 880px; margin: 0 auto; }

.recommend-prompt {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 24px;
}
.recommend-prompt h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  color: var(--ink);
  margin: 0 0 4px;
}
.recommend-prompt p {
  font-size: 14px;
  color: var(--ink-3);
  margin: 0 0 18px;
}
.recommend-scenario-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 14px;
}
.recommend-scenario-chips .chip { font-size: 13px; }
.recommend-input-row {
  display: flex;
  gap: 8px;
}
.recommend-input-row input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--sans);
  font-size: 14.5px;
  color: var(--ink);
}
.recommend-input-row input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(122, 35, 48, 0.12);
}
[data-theme="dark"] .recommend-input-row input:focus {
  box-shadow: 0 0 0 3px rgba(216, 112, 96, 0.18);
}
.recommend-input-row button {
  padding: 12px 22px;
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: var(--radius-md);
  color: var(--bg);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: opacity 0.15s;
}
.recommend-input-row button:hover { opacity: 0.85; }

.recommend-results h3 {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin: 24px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--hairline);
}
.recommend-results h3 .count { font-family: var(--mono); font-weight: 400; font-size: 13px; color: var(--ink-3); margin-left: 6px; }

.recommend-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.recommend-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.15s;
}
.recommend-item:hover { border-color: var(--accent); background: var(--surface-tint); }
.recommend-item .ri-rank {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  color: var(--accent);
  width: 28px;
  flex-shrink: 0;
}
.recommend-item .ri-body { flex: 1; }
.recommend-item .ri-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  margin: 0 0 4px;
}
.recommend-item .ri-title .ri-name-en {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-weight: 400;
  font-size: 13px;
  color: var(--ink-3);
  margin-left: 8px;
}
.recommend-item .ri-meta {
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 6px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.recommend-item .ri-summary {
  font-size: 13.5px;
  color: var(--ink-2);
  margin: 0;
}

.recommend-empty {
  padding: 24px;
  text-align: center;
  color: var(--ink-3);
  font-size: 14px;
}

/* Reason chips inside each recommend-item */
.ri-reasons {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin: 6px 0 8px;
}
.reason-chip {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid;
  font-weight: 500;
}
.reason-chip.reason-scenario {
  background: rgba(122, 35, 48, 0.07);
  border-color: rgba(122, 35, 48, 0.25);
  color: var(--accent);
}
[data-theme="dark"] .reason-chip.reason-scenario {
  background: rgba(216, 112, 96, 0.12);
  border-color: rgba(216, 112, 96, 0.3);
}
.reason-chip.reason-kw {
  background: var(--bg-2);
  border-color: var(--border);
  color: var(--ink-2);
}
.reason-chip.reason-net {
  background: rgba(61, 106, 140, 0.08);
  border-color: rgba(61, 106, 140, 0.25);
  color: var(--d-systems);
}
.reason-chip.reason-disc {
  background: rgba(181, 139, 60, 0.08);
  border-color: rgba(181, 139, 60, 0.25);
  color: var(--d-econ);
}
.reason-chip.reason-tier {
  background: rgba(95, 127, 74, 0.08);
  border-color: rgba(95, 127, 74, 0.25);
  color: var(--d-bio);
}

/* Synergy bundle recommendations */
.recommend-synergies {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
  margin-bottom: 8px;
}
.synergy-mini {
  background: var(--surface-tint);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.15s;
  position: relative;
}
.synergy-mini:hover {
  background: var(--bg-2);
  border-left-color: var(--accent-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.syn-mini-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 4px;
}
.syn-mini-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
}
.syn-mini-overlap {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  background: rgba(122, 35, 48, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}
[data-theme="dark"] .syn-mini-overlap {
  background: rgba(216, 112, 96, 0.16);
}
.syn-mini-subtitle {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-3);
  margin: 0 0 8px;
}
.syn-mini-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}
.syn-mini-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11.5px;
  padding: 2px 8px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  color: var(--ink-2);
}
.syn-mini-chip .smc-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--chip-accent, var(--accent));
}
.syn-mini-chip[data-discipline="經濟學"]            { --chip-accent: var(--d-econ); }
.syn-mini-chip[data-discipline="心理學"]            { --chip-accent: var(--d-psych); }
.syn-mini-chip[data-discipline="物理學與系統"]      { --chip-accent: var(--d-systems); }
.syn-mini-chip[data-discipline="生物學與演化"]      { --chip-accent: var(--d-bio); }
.syn-mini-chip[data-discipline="統計學"]            { --chip-accent: var(--d-stats); }
.syn-mini-chip[data-discipline="工程學"]            { --chip-accent: var(--d-eng); }
.syn-mini-chip[data-discipline="哲學與邏輯"]        { --chip-accent: var(--d-phil); }

.syn-mini-go {
  font-size: 11.5px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ============================================================
   View: Graph (D3 force-directed network)
   ============================================================ */

.graph-wrap {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.graph-header {
  padding: 14px 22px;
  border-bottom: 1px solid var(--hairline);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  justify-content: space-between;
  background: var(--surface-tint);
}

.graph-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.graph-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-2);
  cursor: pointer;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.15s;
}
.graph-legend-item:hover { background: var(--surface); border-color: var(--border); }
.graph-legend-item.is-dimmed { opacity: 0.4; }
.graph-legend-item .lg-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lg-color);
}

.graph-actions { display: flex; gap: 8px; }
.graph-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 12.5px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s;
}
.graph-btn:hover { background: var(--bg-2); border-color: var(--ink-3); color: var(--ink); }

.graph-svg-wrap {
  position: relative;
  width: 100%;
  height: 680px;
  background: var(--surface);
  background-image: radial-gradient(circle, var(--hairline) 1px, transparent 1px);
  background-size: 24px 24px;
}
[data-theme="dark"] .graph-svg-wrap {
  background-image: radial-gradient(circle, rgba(76, 68, 58, 0.4) 1px, transparent 1px);
}
.graph-svg { width: 100%; height: 100%; cursor: grab; }
.graph-svg:active { cursor: grabbing; }

.graph-svg .link {
  stroke: var(--hairline);
  stroke-opacity: 0.55;
  stroke-width: 1;
  transition: stroke 0.15s, stroke-opacity 0.15s, stroke-width 0.15s;
}
.graph-svg .link.is-highlight {
  stroke: var(--accent);
  stroke-opacity: 0.85;
  stroke-width: 1.6;
}
.graph-svg .link.is-dimmed { stroke-opacity: 0.12; }

.graph-svg .node {
  cursor: pointer;
  transition: opacity 0.15s, transform 0.15s;
}
.graph-svg .node circle {
  fill: var(--node-color, var(--accent));
  stroke: var(--surface);
  stroke-width: 1.5;
  transition: stroke 0.15s, stroke-width 0.15s, r 0.15s;
}
.graph-svg .node.is-core circle {
  stroke: var(--gold);
  stroke-width: 2.5;
}
.graph-svg .node.is-highlight circle {
  stroke: var(--accent);
  stroke-width: 3;
}
.graph-svg .node.is-dimmed { opacity: 0.18; }
.graph-svg .node text {
  font-family: var(--serif);
  font-size: 11px;
  fill: var(--ink-2);
  pointer-events: none;
  text-anchor: middle;
  paint-order: stroke;
  stroke: var(--surface);
  stroke-width: 3;
  stroke-linejoin: round;
}
.graph-svg .node.is-core text { font-weight: 600; fill: var(--ink); font-size: 12px; }
.graph-svg .node.is-highlight text { fill: var(--ink); font-weight: 600; }

.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 13px;
  box-shadow: var(--shadow-md);
  max-width: 280px;
  z-index: 5;
  display: none;
}
.graph-tooltip.is-visible { display: block; }
.graph-tooltip .gt-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
  margin: 0 0 2px;
}
.graph-tooltip .gt-en {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-size: 12px;
  color: var(--ink-3);
  margin: 0 0 6px;
}
.graph-tooltip .gt-meta {
  font-size: 11.5px;
  color: var(--ink-3);
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.graph-tooltip .gt-case {
  font-size: 12px;
  color: var(--ink-2);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--hairline);
}
.graph-tooltip .gt-degree {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-3);
  margin-top: 4px;
}

/* edge-variant tooltip */
.graph-tooltip .gt-edge-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 8px;
  flex-wrap: wrap;
}
.graph-tooltip .gt-edge-badge {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #fff;
  padding: 2px 8px;
  border-radius: 3px;
}
.graph-tooltip .gt-edge-pair {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--ink);
}
.graph-tooltip .gt-edge-rationale {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0;
}

/* Graph edge highlight states */
.graph-svg .link.is-highlight {
  stroke-opacity: 1 !important;
  filter: drop-shadow(0 0 4px currentColor);
}
.graph-svg .link.is-dimmed { stroke-opacity: 0.08; }

/* Second legend row for edge types */
.graph-edge-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  font-size: 11.5px;
  color: var(--ink-3);
  padding-top: 8px;
  margin-top: 8px;
  border-top: 1px dashed var(--hairline);
  width: 100%;
}
.graph-edge-legend .gel-label {
  font-weight: 600;
  color: var(--ink-2);
  margin-right: 4px;
}
.graph-edge-legend .gel-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.graph-edge-legend .gel-swatch {
  width: 18px;
  height: 0;
  border-top: 2px solid var(--gel-color);
}
.graph-edge-legend .gel-swatch.dashed { border-top-style: dashed; }
.graph-edge-legend .gel-swatch.thick { border-top-width: 3px; }
.graph-edge-legend .gel-swatch.arrow::after {
  content: " →";
  color: var(--gel-color);
  font-size: 12px;
  vertical-align: middle;
}

/* ============================================================
   Empty state
   ============================================================ */

.empty {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 80px 32px;
  text-align: center;
  color: var(--ink-3);
  font-size: 15px;
}

/* ============================================================
   Modal
   ============================================================ */

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 24px;
  overflow-y: auto;
}
.modal[hidden] { display: none; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(31, 29, 26, 0.42);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
[data-theme="dark"] .modal-backdrop { background: rgba(0, 0, 0, 0.6); }

.modal-panel {
  position: relative;
  background: var(--surface);
  max-width: 760px;
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 48px 56px 56px;
  margin-bottom: 48px;
}
.modal-panel::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: var(--card-accent, var(--accent));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 20px;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-close:hover { background: var(--bg-2); color: var(--ink); }

.modal-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.modal-meta .disc-badge { font-size: 11px; }
.modal-meta .dot { color: var(--border); }

.modal-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 36px;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.modal-title-en {
  font-family: "Source Serif 4", Georgia, serif;
  font-style: italic;
  font-weight: 400;
  font-size: 18px;
  color: var(--ink-3);
  margin: 0 0 24px;
}

.modal-anchor {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: var(--bg-2);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 12px;
}
.modal-anchor::before { content: "▸"; color: var(--card-accent, var(--accent)); font-size: 11px; }

.modal-scenarios { margin-bottom: 24px; }
.modal-scenarios .scenario-tag { margin-right: 4px; }

.modal-body { font-size: 15px; line-height: 1.85; color: var(--ink); }
.modal-body h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  margin: 32px 0 10px;
  color: var(--ink);
  border-left: 3px solid var(--card-accent, var(--accent));
  padding-left: 12px;
}
.modal-body h2:first-of-type { margin-top: 0; }
.modal-body h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15.5px;
  margin: 22px 0 6px;
  color: var(--ink-2);
}
.modal-body p { margin: 0 0 12px; }
.modal-body ul, .modal-body ol { margin: 0 0 12px; padding-left: 22px; }
.modal-body li { margin-bottom: 6px; }
.modal-body strong { color: var(--ink); font-weight: 600; }
.modal-body blockquote {
  margin: 12px 0;
  padding: 8px 16px;
  border-left: 3px solid var(--hairline);
  color: var(--ink-2);
  font-style: italic;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  margin-top: 10px;
}
.related-link {
  display: block;
  padding: 10px 14px;
  background: var(--surface-tint);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
  transition: all 0.15s;
}
.related-link:hover {
  background: var(--bg-2);
  border-color: var(--border);
  color: var(--ink);
  text-decoration: none;
}
.related-link .rl-id { font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); margin-right: 6px; }

/* Related card layout — supports type badge + rationale per item */
.related-link .rl-head {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.related-link .rl-name { font-weight: 500; }
.related-link .rl-type-badge {
  display: inline-flex;
  align-items: center;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: #fff;
  padding: 1px 7px;
  border-radius: 3px;
  margin-left: auto;
  white-space: nowrap;
}
.related-link .rl-dir-hint {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  margin-left: 2px;
}
.related-link .rl-rationale {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-3);
  margin: 6px 0 0;
  padding-top: 6px;
  border-top: 1px dashed var(--hairline);
}
.related-link:has(.rl-rationale) { padding-bottom: 12px; }
.related-link.is-backlink {
  background: transparent;
  border-style: dashed;
  border-color: var(--hairline);
}
.related-link.is-backlink:hover {
  background: var(--surface-tint);
  border-style: solid;
}
.related-link .rl-arrow {
  display: inline-block;
  margin-right: 5px;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.related-heading {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 19px;
  margin: 32px 0 10px;
  border-left: 3px solid var(--card-accent, var(--accent));
  padding-left: 12px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.related-count {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-3);
  font-weight: 400;
}
.related-section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin: 14px 0 6px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.related-section-label .rsl-n {
  font-family: var(--mono);
  font-size: 11px;
  background: var(--bg-2);
  color: var(--ink-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--hairline);
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  max-width: var(--maxw);
  margin: 48px auto 0;
  padding: 28px 32px;
  border-top: 1px solid var(--hairline);
  text-align: center;
  font-size: 13px;
  color: var(--ink-3);
}
.footer-sub { font-size: 12px; margin-top: 4px; opacity: 0.8; }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 720px) {
  .site-header { padding: 24px 18px 18px; }
  .main, .controls { padding-left: 18px; padding-right: 18px; }
  .tab-bar { padding: 0 18px; }
  .modal-panel { padding: 36px 24px 40px; }
  .modal-title { font-size: 28px; }
  .synergy-card { padding: 22px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}