/* ─── François Jullien Concept Explorer — site styles ─── */

:root {
  --bg:        #faf7f2;
  --paper:    #fffdf8;
  --ink:      #1d1d1b;
  --muted:    #6b6760;
  --rule:     #e3ddd1;
  --accent:   #8a3324;
  --accent2:  #2c4a52;
  --jullien:  #5a3c7a;
  --chinese:  #8a3324;
  --western:  #2c4a52;
  --shadow:   0 1px 2px rgba(0,0,0,0.04), 0 4px 18px rgba(0,0,0,0.04);
  --serif:    "Iowan Old Style","Palatino Linotype","Palatino","URW Palladio L","Cambria","Source Serif Pro","Songti SC","STSong",serif;
  --sans:     -apple-system,BlinkMacSystemFont,"Segoe UI","Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(138,51,36,0.25);
  transition: border-color 0.15s ease;
}
a:hover { border-bottom-color: var(--accent); }

/* ─── Site header ─── */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(1.2) blur(6px);
}

.site-header .wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0;
}
.site-title a { color: var(--ink); border-bottom: none; }
.site-title .sub {
  display: block;
  font-size: 12px;
  font-weight: 400;
  font-style: italic;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  gap: 22px;
  font-family: var(--sans);
  font-size: 14px;
}
.site-nav a {
  color: var(--ink);
  border-bottom: none;
  opacity: 0.75;
}
.site-nav a:hover, .site-nav a.active { opacity: 1; color: var(--accent); }

/* ─── Generic page wrap ─── */

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 28px 96px;
}

.page h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 8px;
  font-weight: 600;
  letter-spacing: -0.005em;
}
.page h2 {
  font-size: 22px;
  margin: 40px 0 12px;
  font-weight: 600;
}
.page h3 {
  font-size: 17px;
  margin: 28px 0 8px;
  font-weight: 600;
  font-style: italic;
}
.page .lede {
  font-size: 19px;
  color: var(--muted);
  margin: 0 0 32px;
  line-height: 1.5;
}

.page p { margin: 0 0 18px; }

.kicker {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 8px;
}

/* ─── Graph layout (homepage) ─── */

.graph-shell {
  display: grid;
  grid-template-columns: 1fr 360px;
  height: calc(100vh - 64px);
  min-height: 640px;
  background: var(--paper);
}

.graph-area {
  position: relative;
  background:
    radial-gradient(1200px 700px at 50% 50%, #fefcf6 0%, var(--paper) 60%, #f3eee2 100%);
  overflow: hidden;
}

#graph { width: 100%; height: 100%; display: block; }

.controls {
  position: absolute;
  top: 18px;
  left: 18px;
  background: rgba(255,253,248,0.92);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 12px 14px;
  font-family: var(--sans);
  font-size: 13px;
  box-shadow: var(--shadow);
  max-width: 280px;
}
.controls h4 {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}
.controls .row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.controls .row:last-child { margin-bottom: 0; }
.controls button.chip {
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 999px;
  padding: 4px 10px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  color: var(--ink);
  transition: all 0.15s ease;
}
.controls button.chip.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.controls input[type="search"] {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 6px 8px;
  font: inherit;
  font-size: 13px;
  background: var(--paper);
}

.legend {
  position: absolute;
  bottom: 18px;
  left: 18px;
  background: rgba(255,253,248,0.92);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 10px 14px;
  font-family: var(--sans);
  font-size: 12px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.legend .row { display: flex; align-items: center; gap: 8px; }
.legend .swatch {
  width: 14px; height: 14px;
  border-radius: 50%;
  flex: 0 0 auto;
}
.legend .line {
  width: 26px; height: 2px;
  flex: 0 0 auto;
}

/* ─── Graph elements ─── */

.node circle, .node rect {
  cursor: pointer;
  transition: stroke 0.15s ease, stroke-width 0.15s ease;
}
.node text {
  pointer-events: none;
  user-select: none;
  fill: var(--ink);
}
.node-label-concept {
  font-family: var(--serif);
  font-size: 14px;
}
.node-label-thinker {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.01em;
}
.node.dim { opacity: 0.16; }
.node.highlight circle, .node.highlight rect { stroke-width: 3px; }
.swatch-thinker {
  width: 22px !important; height: 12px !important;
  border-radius: 3px;
  border: 1.4px solid #555;
  background: #ddd;
}
.link.dim, .link-cc.dim, .link-tc.dim, .link-tt.dim,
[class*="link-"].dim { opacity: 0.04 !important; }

.link {
  fill: none;
  pointer-events: none;
}
.link.dim { opacity: 0.06; }

/* Concept ↔ concept edges */
.link-cc-ecart    { stroke: #8a3324; stroke-width: 1.6; stroke-dasharray: 6 4; opacity: 0.55; }
.link-cc-parallel { stroke: #2c4a52; stroke-width: 1.1; stroke-dasharray: 2 4; opacity: 0.42; }
.link-cc-pair     { stroke: #b88a3e; stroke-width: 1.3; opacity: 0.42; }
.link-cc-kinship  { stroke: #4f6f78; stroke-width: 1.3; opacity: 0.38; }
.link-cc-lineage  { stroke: #6a8e3a; stroke-width: 1.2; opacity: 0.45; }
/* cross-map provenance: textual edges drawn firmer, speculative ones fainter */
.link-basis-textual     { stroke-width: 2.2; opacity: 0.75; }
.link-basis-speculative { stroke-width: 0.9; opacity: 0.28; }
/* Thinker → concept edges (thin gray) */
.link-tc          { stroke: #aaa; stroke-width: 0.7; opacity: 0.30; }
.link-tc-coined   { stroke: #555; stroke-width: 1.0; opacity: 0.50; }
.link-tc-central  { stroke: #777; stroke-width: 0.9; opacity: 0.40; }
.link-tc-critiqued { stroke: #b04434; stroke-width: 0.9; opacity: 0.50; stroke-dasharray: 4 3; }
/* Thinker ↔ thinker edges */
.link-tt          { stroke: #999; stroke-width: 0.9; opacity: 0.35; stroke-dasharray: 2 3; }
.link-tt-critique { stroke: #b04434; stroke-width: 1.0; opacity: 0.55; stroke-dasharray: 4 3; }
.link-tt-dispute  { stroke: #b04434; stroke-width: 1.1; opacity: 0.60; stroke-dasharray: 6 3; }

/* ─── Side panel ─── */

.panel {
  border-left: 1px solid var(--rule);
  background: var(--paper);
  overflow-y: auto;
  padding: 28px 24px 64px;
}
.panel .empty {
  color: var(--muted);
  font-style: italic;
  font-size: 14px;
  line-height: 1.6;
}
.panel .term {
  font-size: 44px;
  line-height: 1.05;
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}
.panel .term-en {
  font-style: italic;
  color: var(--muted);
  font-size: 17px;
  margin: 4px 0 0;
}
.panel .meta {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 16px 0 0;
}
.panel .gloss { margin: 16px 0; line-height: 1.55; font-size: 15px; }
.panel .ecart-block {
  background: #f5efe2;
  border-left: 3px solid var(--accent);
  padding: 12px 14px;
  margin: 14px 0;
  font-size: 14px;
  line-height: 1.5;
}
.panel .ecart-block .label {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}
.panel .sources {
  font-size: 13px;
  color: var(--muted);
  font-style: italic;
  margin: 12px 0;
}
.panel .related {
  font-size: 13px;
  margin-top: 16px;
}
.panel .related .label {
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 4px;
}
.panel .related a { display: inline-block; margin-right: 12px; }
.panel .openpage {
  display: inline-block;
  margin-top: 18px;
  padding: 8px 14px;
  background: var(--ink);
  color: var(--paper);
  border-bottom: none;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: 13px;
}
.panel .openpage:hover { background: var(--accent); }

/* ─── Concept page ─── */

.concept-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  align-items: baseline;
  margin: 0 0 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--rule);
}
.concept-header .glyph {
  font-size: 96px;
  line-height: 1;
  font-weight: 500;
}
.concept-header .meta-block .label {
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}
.concept-header h1 {
  font-size: 30px;
  margin: 0 0 6px;
  font-style: italic;
  font-weight: 500;
}
.concept-header .english {
  font-size: 18px;
  color: var(--muted);
}
.concept-header .tradition-tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  margin-top: 10px;
  border: 1px solid currentColor;
}
.concept-header .tradition-tag.chinese { color: var(--chinese); }
.concept-header .tradition-tag.western { color: var(--western); }
.concept-header .tradition-tag.jullien { color: var(--jullien); }

.concept-section { margin: 28px 0; }
.concept-section h2 {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin: 0 0 8px;
}
.concept-section.ecart {
  background: #f5efe2;
  border-left: 3px solid var(--accent);
  padding: 16px 18px;
  margin: 28px -18px;
}
.concept-section.application {
  background: #eff2f1;
  border-left: 3px solid var(--western);
  padding: 16px 18px;
  margin: 28px -18px;
}

.counterpart-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.counterpart-list li {
  font-size: 14px;
  border: 1px solid var(--rule);
  background: var(--paper);
  padding: 4px 10px;
  border-radius: 4px;
}

.sources-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--muted);
}
.sources-list li { margin: 4px 0; font-style: italic; }

/* ─── Essays ─── */

.essay-list { list-style: none; padding: 0; margin: 0; }
.essay-list li {
  border-bottom: 1px solid var(--rule);
  padding: 18px 0;
}
.essay-list li:last-child { border-bottom: none; }
.essay-list h3 { margin: 0 0 6px; font-style: normal; }
.essay-list h3 a { border-bottom: none; color: var(--ink); }
.essay-list h3 a:hover { color: var(--accent); }
.essay-list p { margin: 0; font-size: 14px; color: var(--muted); }

article.essay h1 { margin-bottom: 4px; }
article.essay .essay-meta {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 32px;
}
article.essay p { font-size: 17px; line-height: 1.65; }
article.essay blockquote {
  border-left: 3px solid var(--rule);
  padding: 4px 16px;
  color: var(--muted);
  font-style: italic;
  margin: 24px 0;
}

/* ─── Sources ─── */

.bib-list { list-style: none; padding: 0; margin: 0; }
.bib-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 15px;
}
.bib-list .year {
  font-family: var(--sans);
  font-weight: 600;
  display: inline-block;
  width: 50px;
  color: var(--muted);
}
.bib-list .title { font-style: italic; }
.bib-list .gloss {
  display: block;
  margin-top: 4px;
  margin-left: 50px;
  font-size: 14px;
  color: var(--muted);
}

/* ─── Footer ─── */

.site-foot {
  border-top: 1px solid var(--rule);
  padding: 24px 28px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}

/* ─── Overlay toggles (Filters / Key) — created by graph.js, shown only on small screens ─── */
.overlay-toggle {
  display: none;
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 999px;
  padding: 6px 12px;
  font: inherit;
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  cursor: pointer;
}
.panel .sheet-handle { display: none; }

/* ─── Responsive ─── */

/* Tablets and below: stack the header, let the nav scroll sideways, stack the map and its panel */
@media (max-width: 880px) {
  .site-header .wrap {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px 18px 6px;
  }
  .site-title { font-size: 17px; }
  .site-nav {
    gap: 18px;
    font-size: 14px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    -webkit-mask-image: linear-gradient(to right, #000 calc(100% - 28px), transparent);
            mask-image: linear-gradient(to right, #000 calc(100% - 28px), transparent);
    padding-right: 28px;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a { flex: 0 0 auto; padding: 6px 0; }

  .concept-header { grid-template-columns: 1fr; gap: 12px; }
  .concept-header .glyph { font-size: 72px; }

  /* Map: the graph fills the viewport under the header; the panel becomes a bottom sheet */
  .graph-shell { display: block; height: auto; min-height: 0; }
  .graph-area { height: calc(100dvh - 92px); min-height: 480px; }
  #graph { touch-action: none; }

  .controls {
    top: 12px; left: 12px;
    max-width: calc(100vw - 24px);
    max-height: calc(100dvh - 92px - 80px);
    overflow-y: auto;
    padding: 8px 10px;
  }
  .controls:not(.open) > :not(.overlay-toggle) { display: none; }
  .controls.open > .overlay-toggle { margin-bottom: 10px; }
  .controls button.chip { padding: 6px 12px; font-size: 13px; }
  .controls input[type="search"] { font-size: 16px; } /* prevents iOS zoom-on-focus */

  .legend {
    bottom: 60px; left: 12px;
    max-width: calc(100vw - 24px);
    padding: 8px 10px;
  }
  .legend:not(.open) > :not(.overlay-toggle) { display: none; }
  .legend.open > .overlay-toggle { margin-bottom: 6px; }
  .legend .legend-groups { grid-template-columns: 1fr; }
  .overlay-toggle { display: inline-block; }

  .panel {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 60;
    max-height: 64dvh;
    overflow-y: auto;
    border-left: none;
    border-top: 1px solid var(--rule);
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -6px 24px rgba(0,0,0,0.12);
    padding: 0 20px 40px;
    transform: translateY(calc(100% - 46px));
    transition: transform 0.25s ease;
    overscroll-behavior: contain;
  }
  .panel.open { transform: translateY(0); }
  .panel .sheet-handle {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 1;
    height: 46px;
    margin: 0 -20px 14px;
    padding: 0 20px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    font-family: var(--sans);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    cursor: pointer;
    user-select: none;
  }
  .panel .sheet-handle .sheet-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .panel .sheet-handle .sheet-chevron { flex: 0 0 auto; transition: transform 0.25s ease; }
  .panel.open .sheet-handle .sheet-chevron { transform: rotate(180deg); }
  .panel .term { font-size: 36px; }
}

/* Phones */
@media (max-width: 600px) {
  html, body { font-size: 16px; }
  .site-title .sub { display: none; }
  .page { padding: 28px 18px 72px; }
  .page h1 { font-size: 28px; }
  .page h2 { font-size: 20px; margin-top: 32px; }
  .page .lede { font-size: 17px; margin-bottom: 24px; }
  .concept-header .glyph { font-size: 64px; }
  .concept-header h1 { font-size: 26px; }
  .concept-section.ecart, .concept-section.application { margin: 24px -18px; padding: 14px 18px; }
  .site-foot { padding: 20px 18px; }
  .bib-list .gloss { margin-left: 0; }
  .graph-area { min-height: 420px; }
}