/* Lineage — ink on paper. Monochrome except the single indigo accent
   (#465C9B) reserved for the selected node, its edges, and hyperlinks.
   Square corners, hairline borders, no shadows/gradients/pills. */

@font-face {
  font-family: 'Hanken Grotesk';
  src: url('fonts/hanken-grotesk.woff2') format('woff2');
  font-weight: 100 900; font-display: swap;
}
@font-face {
  font-family: 'Bricolage Grotesque';
  src: url('fonts/bricolage-grotesque.woff2') format('woff2');
  font-weight: 200 800; font-display: swap;
}

:root {
  --ink: #16161a;
  --ink-soft: #55555c;
  --ink-faint: #6f6f76;
  --hairline: #d8d8dc;
  --paper: #ffffff;
  --accent: #465C9B;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Hanken Grotesk', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; border-radius: 0; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--sans); color: var(--ink); background: var(--paper);
  display: flex; flex-direction: column; overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
button {
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--ink); padding: 4px 10px; cursor: pointer;
}
button:hover { background: var(--ink); color: var(--paper); }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.mono { font-family: var(--mono); }

/* header */
header {
  flex: none; display: flex; align-items: center; gap: 20px;
  padding: 10px 20px; border-bottom: 1px solid var(--ink); position: relative;
}
.wordmark { font-family: 'Bricolage Grotesque', var(--sans); font-weight: 700; font-size: 20px; }
#search-form { flex: 1; min-width: 0; max-width: 480px; position: relative; }
#search {
  width: 100%; font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid var(--ink); padding: 6px 10px;
}
#results {
  position: absolute; top: calc(100% + 10px); left: 0; z-index: 10;
  width: 100%; margin: 0; padding: 0; list-style: none;
  background: var(--paper); border: 1px solid var(--ink); border-top: 0;
  max-height: 50vh; overflow-y: auto;
}
#results li { padding: 8px 10px; border-bottom: 1px solid var(--hairline); cursor: pointer; }
#results li:last-child { border-bottom: 0; }
#results li:hover, #results li[aria-selected="true"] { background: var(--ink); color: var(--paper); }
#results .yr { font-family: var(--mono); font-size: 12px; color: var(--ink-faint); }
#results li:hover .yr, #results li[aria-selected="true"] .yr { color: var(--paper); }

/* main area */
main { flex: 1; display: flex; min-height: 0; position: relative; }
#canvas { flex: 1; min-width: 0; display: block; }
#layout-controls {
  position: absolute; z-index: 4; top: 10px; left: 12px;
  display: flex; align-items: center; gap: 8px;
  padding: 6px 8px; border: 1px solid var(--hairline);
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
}
#layout-controls label { white-space: nowrap; }
#node-spacing { width: 112px; accent-color: var(--accent); cursor: ew-resize; }
#node-spacing-value { min-width: 30px; color: var(--ink); }
#reset-layout { padding: 2px 7px; font-size: 11px; }

/* graph marks (SVG) */
.edge { stroke: var(--ink-soft); stroke-width: 0.75; fill: none; }
.edge.dim { stroke: var(--hairline); }
.edge.selected-edge { stroke: var(--accent); }
.cited-tick { fill: none; stroke: var(--ink); stroke-width: 1; }
.node circle.dot { fill: var(--ink); stroke: none; }
.node.undated circle.dot { fill: var(--paper); stroke: var(--ink); stroke-width: 1; }
.node circle.hit { fill: transparent; cursor: ns-resize; pointer-events: all; }
.node.selected circle.dot { fill: var(--accent); }
.node.selected circle.ring, .node:focus-visible circle.ring {
  fill: none; stroke: var(--ink); stroke-width: 1; visibility: visible;
}
.node circle.ring { visibility: hidden; }
.node.selected circle.ring { stroke: var(--accent); }
.node.positioned:not(.selected) circle.ring {
  visibility: visible; stroke: var(--ink-faint); stroke-dasharray: 2 2;
}
.node text {
  font-family: var(--mono); font-size: 11px; fill: var(--ink);
  paint-order: stroke; stroke: var(--paper); stroke-width: 3px;
  visibility: hidden; pointer-events: none;
}
.node:hover text, .node.selected text, .node.pinned text, .node:focus-visible text { visibility: visible; }
.axis text { font-family: var(--mono); font-size: 11px; fill: var(--ink-soft); }
.axis line, .axis path { stroke: var(--ink-soft); }
.gutter-rule { stroke: var(--hairline); stroke-dasharray: 3 3; }
.gutter-label { font-family: var(--mono); font-size: 10px; fill: var(--ink-faint); }

/* empty state */
#empty {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 8px; text-align: center;
  padding: 24px; pointer-events: none;
}
#empty p { max-width: 52ch; margin: 4px 0; }
#empty .convention { color: var(--ink-soft); font-size: 14px; }
#empty .examples { pointer-events: auto; }
.example-query { margin: 0 4px; }

/* inspector: side column >=720px, bottom sheet below */
#inspector {
  flex: none; width: 340px; border-left: 1px solid var(--ink);
  padding: 16px; overflow-y: auto; position: relative; background: var(--paper);
}
#inspector h2 { font-size: 16px; margin: 0 24px 6px 0; }
#inspector .meta { color: var(--ink-soft); margin: 0 0 4px; }
#inspector .counts { font-size: 12px; color: var(--ink-soft); }
#inspector .expansion-status { margin: 8px 0; }
#inspector .expansion-status p {
  margin: 3px 0; color: var(--ink-soft); font-size: 11px;
}
#inspector .abstract { font-size: 14px; }
#inspector .actions { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
#inspector .relations h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  border-top: 1px solid var(--hairline); padding-top: 10px; margin: 14px 0 4px;
}
#inspector .relations ul { margin: 0; padding-left: 18px; font-size: 13px; }
#inspector-close { position: absolute; top: 8px; right: 8px; border-color: var(--hairline); }
@media (max-width: 719px) {
  #layout-controls { right: 12px; }
  #layout-controls label { position: absolute; width: 1px; height: 1px; overflow: hidden; }
  #node-spacing { flex: 1; width: auto; }
  #inspector {
    position: absolute; left: 0; right: 0; bottom: 0; width: auto;
    max-height: 55%; border-left: 0; border-top: 1px solid var(--ink);
  }
}

/* footer */
footer {
  flex: none; display: flex; align-items: center; gap: 12px;
  border-top: 1px solid var(--ink); padding: 6px 20px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-soft);
  min-width: 0;
}
#status { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#about { margin-left: auto; position: relative; flex: none; }
#about summary { cursor: pointer; color: var(--ink-soft); }
#about summary:hover { color: var(--ink); }
#about .about-copy {
  position: absolute; right: 0; bottom: calc(100% + 9px); z-index: 20;
  width: min(380px, calc(100vw - 40px)); padding: 12px;
  color: var(--ink); background: var(--paper); border: 1px solid var(--ink);
  font-family: var(--sans); font-size: 13px; line-height: 1.4;
}
#about .about-copy p { margin: 6px 0 0; }

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