/* ============================================================
   Minds — base stylesheet
   Mobile-first. Professional. Theme color via CSS vars.
   ============================================================ */

:root {
  --color-primary: #1f4e5f;
  --color-accent:  #c97b3f;
  --color-surface: #fbf8f3;
  --color-ink:     #1a1a1a;

  --color-bg:        #ffffff;
  --color-bg-soft:   #f7f5f0;
  --color-border:    rgba(0,0,0,0.08);
  --color-border-strong: rgba(0,0,0,0.16);
  --color-muted:     #6b6b6b;
  --color-muted-2:   #9a9a9a;

  --topbar-bg: rgba(255, 255, 255, 0.86);
  --scrollbar-track: #f0ede5;
  --scrollbar-thumb: rgba(0, 0, 0, 0.18);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.32);
}

/* ============================================================
   护眼模式 (sepia / Kindle paperwhite): warm cream background
   ============================================================ */
:root[data-theme="sepia"] {
  --color-bg:            #f4ecd8;
  --color-bg-soft:       #ebe1c8;
  --color-surface:       #f4ecd8;
  --color-border:        rgba(110, 80, 40, 0.14);
  --color-border-strong: rgba(110, 80, 40, 0.26);
  --color-ink:           #3a2f1f;
  --color-muted:         #7a6a4f;
  --color-muted-2:       #a89876;

  --topbar-bg:           rgba(244, 236, 216, 0.92);
  --scrollbar-track:     #ebe1c8;
  --scrollbar-thumb:     rgba(110, 80, 40, 0.28);
  --scrollbar-thumb-hover: rgba(110, 80, 40, 0.46);
}

/* Firefox scrollbar */
* {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}
/* WebKit / Blink scrollbar */
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); }
::-webkit-scrollbar-thumb {
  background-color: var(--scrollbar-thumb);
  border-radius: 6px;
  border: 2px solid var(--scrollbar-track);
}
::-webkit-scrollbar-thumb:hover { background-color: var(--scrollbar-thumb-hover); }
::-webkit-scrollbar-corner { background: var(--scrollbar-track); }
:root {

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;

  --radius: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 1px 1px rgba(0,0,0,0.03);
  --shadow:    0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);

  --topbar-h: 56px;
  --sidebar-w: 280px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-bg);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar-h);
  background: var(--topbar-bg);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--color-ink);
  font-size: 16px;
  letter-spacing: 0.02em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  color: var(--color-primary);
  font-size: 20px;
  line-height: 1;
}
.topnav {
  display: none;
  margin-left: 24px;
  gap: 4px;
  flex: 1;
}
.topnav a {
  color: var(--color-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 8px;
  transition: all .18s var(--ease);
}
.topnav a:hover {
  color: var(--color-ink);
  background: var(--color-bg-soft);
  text-decoration: none;
}
.topnav a.graph-link {
  color: var(--color-primary);
}
.topbar-right { margin-left: auto; display: flex; gap: 4px; }
.search-trigger {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .18s var(--ease);
}
.search-trigger:hover {
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}

/* theme toggle button — same shape as search trigger */
.theme-toggle {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all .18s var(--ease);
}
.theme-toggle:hover {
  border-color: var(--color-border-strong);
  color: var(--color-ink);
}
.theme-toggle .icon-sepia { display: none; }
:root[data-theme="sepia"] .theme-toggle .icon-default { display: none; }
:root[data-theme="sepia"] .theme-toggle .icon-sepia { display: block; }

/* hamburger */
.hamburger {
  width: 36px; height: 36px;
  border: none; background: transparent;
  display: inline-flex; flex-direction: column;
  justify-content: center; align-items: center; gap: 4px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--color-ink);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.sidebar-open .hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.sidebar-open .hamburger span:nth-child(2) { opacity: 0; }
.sidebar-open .hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- sidebar ---------- */
.sidebar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--color-bg-soft);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  /* prevent scroll chaining: when sidebar reaches top/bottom,
     don't propagate scroll events to the page below */
  overscroll-behavior: contain;
  padding: 20px 18px 80px;
  transform: translateX(-100%);
  transition: transform .3s var(--ease);
  z-index: 40;
  -webkit-overflow-scrolling: touch;
}
body.sidebar-open .sidebar { transform: translateX(0); }

.sidebar-thinker {
  padding-bottom: 16px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}
.sidebar-name { font-weight: 600; font-size: 16px; }
.sidebar-name-en {
  font-size: 12px; color: var(--color-muted-2);
  letter-spacing: 0.04em; margin-top: 2px;
}
.sidebar-tagline {
  font-size: 12px; color: var(--color-muted);
  margin-top: 6px;
}
.sidebar-quick {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}
.sidebar-quick a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--color-ink);
  transition: background .15s var(--ease);
}
.sidebar-quick a:hover {
  background: rgba(0,0,0,0.05);
  text-decoration: none;
}
.sidebar-quick a svg {
  flex-shrink: 0;
  color: var(--color-muted);
}
.sidebar-quick a.quick-graph {
  color: var(--color-primary);
}
.sidebar-quick a.quick-graph svg {
  color: var(--color-primary);
}
.sidebar-quick a.quick-graph:hover {
  background: rgba(31,78,95,0.08);
}

.sidebar-group { margin-bottom: 6px; }
.sidebar-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 600;
  color: var(--color-muted-2);
  padding: 8px 8px;
  background: transparent;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: background .15s var(--ease), color .15s var(--ease);
}
.sidebar-group-title:hover {
  background: rgba(0,0,0,0.04);
  color: var(--color-ink);
}
.sidebar-group-title .g-label { flex: 1; }
.sidebar-group-title .count {
  background: var(--color-bg);
  border-radius: 10px;
  padding: 1px 8px;
  font-size: 10px;
  font-weight: 500;
  border: 1px solid var(--color-border);
  letter-spacing: 0;
}
.sidebar-group-title .chev {
  flex-shrink: 0;
  transform: rotate(-90deg);
  transition: transform .22s var(--ease);
  color: var(--color-muted-2);
}
.sidebar-group[aria-expanded="true"] > .sidebar-group-title .chev {
  transform: rotate(0deg);
}

.sidebar-group-list {
  list-style: none; margin: 0; padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height .28s var(--ease);
}
.sidebar-group[aria-expanded="true"] > .sidebar-group-list {
  max-height: 70vh;
  overflow-y: auto;
  margin-top: 2px;
  margin-bottom: 8px;
}
/* Source group has nested collections (book → chapters) that can be very long;
   let them grow naturally and rely on the sidebar's own scrollbar. */
.sidebar-group[data-group="source"][aria-expanded="true"] > .sidebar-group-list {
  max-height: 99999px;
  overflow: visible;
}
.sidebar-group li a {
  display: block;
  padding: 5px 10px 5px 28px;
  color: var(--color-ink);
  border-radius: 6px;
  font-size: 13px;
  line-height: 1.45;
  transition: background .15s var(--ease);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sidebar-group li a:hover {
  background: var(--color-bg);
  text-decoration: none;
}
.sidebar-group li a.active {
  background: var(--color-primary);
  color: #fff;
}
.sidebar-thinkers li a {
  color: var(--color-muted);
}

/* ---------- sidebar source collections (nested) ---------- */
.sidebar-source-list { padding: 0; }
.sidebar-collection {
  list-style: none;
  padding: 0;
  margin: 2px 0 4px;
}
.sidebar-collection-title {
  font: 600 12px var(--font-sans);
  color: var(--color-muted);
  letter-spacing: 0.04em;
  padding: 6px 10px 6px 22px;
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  border-radius: 6px;
  transition: background .15s var(--ease);
}
.sidebar-collection-title:hover {
  background: var(--color-bg);
  color: var(--color-ink);
}
.sidebar-collection-title .chev {
  flex-shrink: 0;
  transform: rotate(-90deg);
  transition: transform .2s var(--ease);
  color: var(--color-muted-2);
}
.sidebar-collection[aria-expanded="true"] > .sidebar-collection-title .chev {
  transform: rotate(0deg);
}
.sidebar-collection-name { flex: 1; }
.sidebar-collection-count {
  font-size: 10px;
  color: var(--color-muted-2);
  font-weight: 500;
  letter-spacing: 0;
  background: var(--color-bg-soft);
  padding: 1px 7px;
  border-radius: 999px;
}
.sidebar-collection-list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s var(--ease);
}
.sidebar-collection[aria-expanded="true"] > .sidebar-collection-list {
  /* large cap so it never clips; sidebar's own scrollbar handles overflow */
  max-height: 9999px;
  margin-top: 2px;
  margin-bottom: 6px;
}
.sidebar-collection-list li a {
  display: flex;
  gap: 10px;
  padding-left: 32px;
  padding-right: 10px;
  font-size: 12.5px;
}
.chapter-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--color-muted-2);
  flex-shrink: 0;
  margin-top: 3px;
  letter-spacing: 0;
}
.chapter-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ---------- main ---------- */
.main {
  padding: 28px 20px 80px;
  max-width: 920px;
  margin: 0 auto;
}
.main-root { max-width: 1080px; }

/* ---------- root index (landing) ---------- */
body.root .topnav { display: none; }
.hero {
  text-align: center;
  padding: 64px 16px 40px;
}
.hero-mark {
  font-size: 56px;
  color: var(--color-primary);
  line-height: 1;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 48px;
  font-weight: 700;
  margin: 12px 0 4px;
  letter-spacing: 0.02em;
}
.hero-title-en {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--color-muted-2);
  text-transform: lowercase;
  margin-bottom: 14px;
}
.hero-sub {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.75;
  max-width: 480px;
  margin: 0 auto;
}

.thinker-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 40px auto;
  max-width: 880px;
}
.thinker-card {
  display: block;
  padding: 28px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-ink);
  transition: all .25s var(--ease);
  position: relative;
  overflow: hidden;
}
.thinker-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--color-primary);
  opacity: 0.6;
  transition: width .25s var(--ease);
}
.thinker-card:hover {
  text-decoration: none;
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.thinker-card:hover::before { width: 6px; opacity: 1; }
.thinker-card-name {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
}
.thinker-card-name-en {
  font-size: 12px;
  color: var(--color-muted-2);
  letter-spacing: 0.06em;
  margin-top: 2px;
}
.thinker-card-tagline {
  color: var(--color-muted);
  margin-top: 10px;
  font-size: 14px;
}
.thinker-card-stats {
  display: flex;
  gap: 18px;
  margin-top: 18px;
  font-size: 12px;
  color: var(--color-muted-2);
}
.thinker-card-stats b {
  color: var(--color-ink);
  font-size: 14px;
  margin-right: 4px;
}
.thinker-card-add {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-style: dashed;
  color: var(--color-muted-2);
  cursor: default;
}
.thinker-card-add::before { display: none; }
.thinker-card-add:hover { transform: none; box-shadow: none; }
.add-mark {
  font-size: 32px;
  color: var(--color-muted-2);
  line-height: 1;
}
.add-hint { font-size: 11px; margin-top: 6px; }

.root-about {
  max-width: 640px;
  margin: 60px auto 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 14px;
}
.root-about h3 {
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.root-about code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--color-bg-soft);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ---------- thinker home ---------- */
.thinker-hero {
  padding: 24px 0 36px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 36px;
}
.thinker-hero-en {
  font-size: 12px;
  color: var(--color-muted-2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}
.thinker-hero h1 {
  font-family: var(--font-serif);
  font-size: 40px;
  margin: 8px 0 4px;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.thinker-hero-tagline {
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 16px;
}
.thinker-hero-bio {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.85;
  max-width: 640px;
}
.thinker-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 24px;
}
.thinker-hero-stats > div {
  display: flex;
  flex-direction: column;
}
.thinker-hero-stats b {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-ink);
  line-height: 1;
}
.thinker-hero-stats span {
  font-size: 11px;
  color: var(--color-muted-2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 6px;
}
.cta-graph {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 22px;
  background: var(--color-primary);
  color: #fff !important;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}
.cta-graph:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}
.thinker-hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
  flex-wrap: wrap;
}
.thinker-hero-actions .cta-graph { margin-top: 0; }
.thinker-hero-actions .share-btn { margin-left: 0; }

.block { margin-bottom: 48px; }
.block-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px;
}
.block-head h2 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  margin: 0;
}
.block-more {
  font-size: 13px;
  color: var(--color-muted);
}

/* ---------- card grid ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.card-grid-dense {
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
}
.entity-card {
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  color: var(--color-ink);
  transition: all .2s var(--ease);
  position: relative;
}
.entity-card:hover {
  text-decoration: none;
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.entity-card-title {
  font-weight: 600;
  font-size: 15px;
  line-height: 1.35;
  margin-top: 6px;
}
.entity-card-en {
  font-size: 11px;
  color: var(--color-muted-2);
  letter-spacing: 0.04em;
  margin-top: 2px;
}
.entity-card-stats {
  font-size: 11px;
  color: var(--color-muted-2);
  margin-top: 10px;
  letter-spacing: 0.02em;
}

/* ---------- source collection sections ---------- */
.source-collection {
  margin-bottom: 56px;
}
.source-collection:last-child {
  margin-bottom: 0;
}
.collection-head {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}
.collection-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
}
.collection-en {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-muted-2);
  letter-spacing: 0.06em;
  margin-left: 10px;
  text-transform: lowercase;
}
.collection-meta {
  font-size: 12px;
  color: var(--color-muted);
  margin-top: 8px;
  letter-spacing: 0.02em;
}
.collection-meta .dot {
  color: var(--color-muted-2);
  margin: 0 6px;
}
.collection-desc {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
  margin: 10px 0 0;
  max-width: 720px;
}

/* ---------- chapter card variant ---------- */
.chapter-card {
  display: flex;
  flex-direction: column;
  min-height: 92px;
}
.chapter-card .entity-card-title {
  font-family: var(--font-serif);
  font-size: 14.5px;
  font-weight: 600;
  margin-top: 8px;
  flex: 1;
}
.chapter-date {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-muted-2);
  margin-top: 8px;
  letter-spacing: 0.04em;
}
.era-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  background: var(--color-bg-soft);
  color: var(--color-muted);
  align-self: flex-start;
}

/* theme pill */
.theme-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.06em;
}
.theme-wealth     { background: rgba(201,123,63,0.12); color: #a8581f; }
.theme-happiness  { background: rgba(122,155,118,0.15); color: #4f6e4b; }
.theme-thinking   { background: rgba(90,107,140,0.13); color: #3e4d6e; }

/* ---------- list page ---------- */
.list-head {
  display: flex; align-items: baseline; gap: 16px;
  margin: 0 0 28px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border);
}
.list-head h1 {
  font-family: var(--font-serif);
  font-size: 32px; margin: 0;
}
.list-count {
  color: var(--color-muted-2);
  font-size: 13px;
}

/* ---------- entity page ---------- */
body.entity .main { max-width: 760px; }
.entity-page { padding-top: 12px; }
.entity-meta {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.entity-kind {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  background: var(--color-bg-soft);
  color: var(--color-muted);
}
.kind-concept { background: rgba(31,78,95,0.1);  color: #1f4e5f; }
.kind-person  { background: rgba(139,47,47,0.1); color: #8b2f2f; }
.kind-book    { background: rgba(122,92,46,0.1); color: #7a5c2e; }
.kind-source  { background: rgba(74,74,74,0.1);  color: #4a4a4a; }

.entity-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: 0.01em;
  line-height: 1.25;
}
.entity-title-en {
  font-size: 14px;
  color: var(--color-muted-2);
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}

.entity-body {
  font-family: var(--font-serif);
  font-size: 16.5px;
  line-height: 1.85;
  color: #2a2a2a;
}
.entity-body h2 {
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  margin: 36px 0 12px;
  padding-top: 8px;
  letter-spacing: 0.02em;
  color: var(--color-ink);
}
.entity-body h3 {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  margin: 28px 0 10px;
  color: var(--color-ink);
}
.entity-body p { margin: 0 0 18px; }
.entity-body a {
  color: var(--color-primary);
  border-bottom: 1px solid rgba(31,78,95,0.25);
  text-decoration: none;
  transition: background .15s var(--ease);
  padding: 0 1px;
}
.entity-body a:hover {
  background: rgba(31,78,95,0.08);
  border-bottom-color: var(--color-primary);
}
.entity-body blockquote {
  margin: 20px 0;
  padding: 12px 0 12px 20px;
  border-left: 3px solid var(--color-accent);
  color: #555;
  font-style: italic;
  background: linear-gradient(to right, rgba(201,123,63,0.04), transparent 80%);
}
.entity-body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-bg-soft);
  padding: 1px 6px;
  border-radius: 4px;
}
.entity-body pre {
  background: #1a1a1a;
  color: #f0f0f0;
  padding: 16px 18px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
}
.entity-body pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.entity-body table {
  border-collapse: collapse;
  width: 100%;
  margin: 18px 0;
  font-size: 14px;
  font-family: var(--font-sans);
}
.entity-body th, .entity-body td {
  text-align: left;
  padding: 10px 14px;
  border-bottom: 1px solid var(--color-border);
}
.entity-body th {
  background: var(--color-bg-soft);
  font-weight: 600;
}
.entity-body ul, .entity-body ol { padding-left: 22px; margin: 0 0 18px; }
.entity-body li { margin: 4px 0; }
.entity-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 32px 0;
}
.wikilink-broken {
  color: var(--color-muted-2);
  border-bottom: 1px dashed var(--color-muted-2);
}

.entity-section {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.entity-section-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-muted-2);
  font-weight: 600;
  margin: 0 0 14px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}
.related-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  color: var(--color-ink);
  transition: all .15s var(--ease);
}
.related-card:hover {
  text-decoration: none;
  border-color: var(--color-primary);
  background: var(--color-bg-soft);
}
.related-kind {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}
.related-title {
  font-size: 13px;
  font-weight: 500;
}

/* ---------- search overlay ---------- */
.search-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20,20,20,0.4);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  padding-left: 16px;
  padding-right: 16px;
}
.search-overlay.open {
  opacity: 1;
  pointer-events: auto;
}
.search-modal {
  background: #fff;
  border-radius: 14px;
  width: 100%;
  max-width: 560px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.search-modal input {
  width: 100%;
  border: none;
  outline: none;
  font-size: 17px;
  padding: 18px 22px;
  font-family: var(--font-sans);
  border-bottom: 1px solid var(--color-border);
}
.search-results {
  max-height: 50vh;
  overflow-y: auto;
}
.search-results .result {
  display: block;
  padding: 12px 22px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-ink);
}
.search-results .result:hover,
.search-results .result.active {
  background: var(--color-bg-soft);
  text-decoration: none;
}
.search-results .result-title {
  font-weight: 600;
  font-size: 14px;
}
.search-results .result-meta {
  font-size: 11px;
  color: var(--color-muted-2);
  margin-top: 2px;
}
.search-hint {
  padding: 10px 22px;
  font-size: 11px;
  color: var(--color-muted-2);
  background: var(--color-bg-soft);
  text-align: right;
}

/* ---------- footer ---------- */
.site-footer {
  text-align: center;
  padding: 32px 16px 24px;
  font-size: 12px;
  color: var(--color-muted-2);
  border-top: 1px solid var(--color-border);
  margin-top: 60px;
}
.site-footer .dot { margin: 0 8px; }
.site-footer a { color: var(--color-muted); }

/* ---------- graph page ---------- */
body.graph-page .main {
  max-width: none;
  padding: 0;
}
body.graph-page footer.site-footer { display: none; }
.graph-shell {
  display: flex;
  flex-direction: column;
  height: calc(100vh - var(--topbar-h));
  background:
    radial-gradient(ellipse at top, #fafaf7 0%, #f1ede4 100%);
}
.graph-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 22px 8px;
}
.graph-header h1 {
  font-family: var(--font-serif);
  font-size: 22px;
  margin: 0;
  font-weight: 700;
}
.graph-stats {
  font-size: 12px;
  color: var(--color-muted-2);
  margin-top: 2px;
  letter-spacing: 0.04em;
}
.graph-controls {
  display: flex;
  gap: 6px;
}
.graph-controls button {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(10px);
  cursor: pointer;
  font-size: 16px;
  color: var(--color-ink);
  transition: all .15s var(--ease);
}
.graph-controls button:hover {
  background: #fff;
  border-color: var(--color-border-strong);
  transform: translateY(-1px);
}
.graph-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 22px 12px;
}
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all .15s var(--ease);
  user-select: none;
}
.legend-item:hover { background: #fff; }
.legend-item.dimmed {
  opacity: 0.35;
}
.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  display: inline-block;
}

.graph-canvas-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  touch-action: none;
}
#graph-svg {
  width: 100%;
  height: 100%;
  display: block;
}
.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(20,20,20,0.92);
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.4;
  opacity: 0;
  transition: opacity .15s var(--ease);
  max-width: 220px;
  z-index: 10;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}
.graph-tooltip.show { opacity: 1; }
.graph-tooltip strong {
  display: block;
  font-size: 13px;
  margin-bottom: 2px;
}
.graph-tooltip .tip-en {
  color: #aaa;
  font-size: 10px;
  letter-spacing: 0.04em;
}
.graph-tooltip .tip-stats {
  margin-top: 4px;
  color: #ccc;
  font-size: 10px;
}

.graph-axis-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.axis-label {
  position: absolute;
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.45;
}

.graph-help {
  text-align: center;
  padding: 8px;
  font-size: 11px;
  color: var(--color-muted-2);
  letter-spacing: 0.04em;
}

/* ---------- responsive ---------- */
@media (min-width: 900px) {
  :root { --topbar-h: 60px; }
  .main {
    padding: 36px 40px 100px;
    margin-left: var(--sidebar-w);
    max-width: none;
  }
  body.entity .main {
    max-width: 760px;
    margin-left: var(--sidebar-w);
    padding-left: 60px;
  }
  body.root .main {
    margin-left: 0;
    max-width: 1080px;
  }
  body.graph-page .main {
    margin-left: var(--sidebar-w);
  }
  .sidebar {
    transform: translateX(0);
  }
  .hamburger { display: none; }
  .topnav { display: flex; }
  .thinker-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title { font-size: 64px; }
}
@media (min-width: 1280px) {
  .main { padding-left: 60px; padding-right: 60px; }
}

/* hide sidebar on root page entirely */
body.root .sidebar { display: none; }
body.root .main { margin-left: auto !important; }

/* ============================================================
   Share-as-image button + modal
   ============================================================ */
.share-btn {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 500 12px var(--font-sans);
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-border-strong);
  background: var(--color-bg);
  color: var(--color-muted);
  cursor: pointer;
  transition: all 160ms var(--ease);
}
.share-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-bg-soft);
}
.share-btn:disabled { opacity: 0.5; cursor: wait; }
.share-btn svg { display: block; }

.share-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: share-fade 180ms var(--ease);
}
@keyframes share-fade { from { opacity: 0; } to { opacity: 1; } }

.share-modal {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  max-width: min(960px, 96vw);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.share-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.share-tabs {
  display: inline-flex;
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: 3px;
  gap: 2px;
}
.share-tabs button {
  font: 500 13px var(--font-sans);
  padding: 7px 16px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--color-muted);
  cursor: pointer;
  transition: all 160ms var(--ease);
}
.share-tabs button:hover { color: var(--color-ink); }
.share-tabs button.active {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.share-modal-x {
  background: none;
  border: none;
  font-size: 24px;
  line-height: 1;
  color: var(--color-muted);
  cursor: pointer;
  padding: 0 6px;
}
.share-modal-x:hover { color: var(--color-ink); }

.share-preview {
  overflow: auto;
  background: var(--color-bg-soft);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  justify-content: center;
}
.share-preview canvas {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.share-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.share-hint {
  font: 400 12px var(--font-sans);
  color: var(--color-muted-2);
}
.share-download {
  font: 500 14px var(--font-sans);
  padding: 10px 22px;
  border-radius: 8px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  transition: filter 160ms var(--ease);
}
.share-download:hover { filter: brightness(1.1); }

@media (max-width: 600px) {
  .share-overlay {
    padding: 0;
    align-items: stretch;
  }
  .share-modal {
    padding: 12px;
    gap: 10px;
    width: 100vw;
    max-width: 100vw;
    /* dvh = dynamic viewport height; correctly excludes mobile browser chrome */
    max-height: 100vh;
    max-height: 100dvh;
    border-radius: 0;
  }
  .share-modal-head { flex-shrink: 0; }
  .share-modal-x {
    font-size: 30px;
    padding: 4px 14px;
    line-height: 1;
    /* bigger touch target */
    min-width: 44px;
    min-height: 44px;
  }
  .share-preview {
    flex: 1 1 0;
    min-height: 0;
    padding: 6px;
  }
  /* override JS-set inline styles so canvas truly fits its parent */
  .share-preview canvas {
    width: auto !important;
    height: auto !important;
    max-width: 100% !important;
    max-height: 100% !important;
  }
  .share-actions {
    flex-shrink: 0;
    flex-direction: column-reverse;
    align-items: stretch;
  }
  .share-download { width: 100%; }
}