:root {
  --bg: #fbfaf8;
  --panel: #ffffff;
  --ink: #1b1a18;
  --muted: #6a675f;
  --line: #e2ded6;
  --accent: #9a4a1b;
  --science: #2f6b4f;
  --company: #1f5d82;
  --financing: #7a3c86;
  --gap: #8a3030;
  --locked: #b9b4aa;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15140f;
    --panel: #1e1d18;
    --ink: #efece4;
    --muted: #a39f94;
    --line: #333129;
    --accent: #e0914f;
    --science: #68bb92;
    --company: #6bb0d8;
    --financing: #c290d0;
    --gap: #e0837b;
    --locked: #514d44;
  }
}
:root[data-theme="dark"] {
  --bg: #15140f; --panel: #1e1d18; --ink: #efece4; --muted: #a39f94;
  --line: #333129; --accent: #e0914f; --science: #68bb92; --company: #6bb0d8;
  --financing: #c290d0; --gap: #e0837b; --locked: #514d44;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
header { border-bottom: 1px solid var(--line); background: var(--panel); }
.bar {
  max-width: 1120px; margin: 0 auto; padding: 18px 16px 12px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; justify-content: space-between;
}
h1 { font-size: 1.22rem; margin: 0; letter-spacing: -0.01em; }
.sub { margin: 3px 0 0; color: var(--muted); font-size: 0.86rem; }
.cutoff-label { display: block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); margin-bottom: 5px; }
.seg { display: flex; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.seg button {
  font: inherit; font-size: 0.8rem; padding: 7px 12px; border: 0; cursor: pointer;
  background: transparent; color: var(--muted); border-right: 1px solid var(--line);
}
.seg button:last-child { border-right: 0; }
.seg button[aria-pressed="true"] { background: var(--accent); color: #fff; font-weight: 600; }

.banner { max-width: 1120px; margin: 0 auto; padding: 0 16px 12px; font-size: 0.82rem; color: var(--muted); }
.banner strong { color: var(--ink); }
.banner.lifted { color: var(--gap); }

nav { max-width: 1120px; margin: 0 auto; padding: 0 16px; display: flex; gap: 2px; flex-wrap: wrap; }
nav button {
  font: inherit; font-size: 0.87rem; padding: 9px 14px; border: 1px solid transparent; border-bottom: 0;
  background: transparent; color: var(--muted); cursor: pointer; border-radius: 8px 8px 0 0;
  margin-bottom: -1px;
}
nav button[aria-selected="true"] {
  background: var(--bg); border-color: var(--line); color: var(--ink); font-weight: 600;
}

main { max-width: 1120px; margin: 0 auto; padding: 22px 16px 40px; }
.view { display: none; }
.view.active { display: block; }
h2 { font-size: 1.05rem; margin: 0 0 6px; }
.lede { color: var(--muted); font-size: 0.9rem; margin: 0 0 18px; max-width: 70ch; }

.layer-head {
  display: flex; align-items: baseline; gap: 9px; margin: 22px 0 10px;
  padding-bottom: 6px; border-bottom: 1px solid var(--line);
}
.layer-head h3 { margin: 0; font-size: 0.93rem; }
.count { color: var(--muted); font-size: 0.8rem; }
.dot { width: 9px; height: 9px; border-radius: 50%; flex: none; }
.dot.science { background: var(--science); }
.dot.company { background: var(--company); }
.dot.financing { background: var(--financing); }

.cards { display: grid; gap: 11px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 13px 14px; border-left: 3px solid var(--line);
}
.card.science { border-left-color: var(--science); }
.card.company { border-left-color: var(--company); }
.card.financing { border-left-color: var(--financing); }
.card.gap { border-left-color: var(--gap); }
.card .date { font-size: 0.74rem; color: var(--muted); font-variant-numeric: tabular-nums; letter-spacing: 0.03em; }
.card h4 { margin: 4px 0 6px; font-size: 0.92rem; line-height: 1.35; }
.card p { margin: 0 0 8px; font-size: 0.84rem; color: var(--muted); }
.caveat {
  font-size: 0.79rem; background: color-mix(in srgb, var(--gap) 9%, transparent);
  border-radius: 7px; padding: 7px 9px; margin: 0 0 9px; color: var(--ink);
}
.caveat b { color: var(--gap); }
.srcline { display: flex; flex-wrap: wrap; gap: 7px; align-items: center; font-size: 0.74rem; }
.srcline a { color: var(--accent); text-decoration: none; border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.srcline a:hover { border-bottom-color: var(--accent); }
.tag {
  font-size: 0.68rem; padding: 2px 6px; border-radius: 5px; background: var(--bg);
  border: 1px solid var(--line); color: var(--muted); letter-spacing: 0.02em;
}
.track-tag { font-size: 0.68rem; padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); color: var(--muted); }

.locked {
  background: repeating-linear-gradient(45deg, transparent, transparent 7px, color-mix(in srgb, var(--locked) 16%, transparent) 7px, color-mix(in srgb, var(--locked) 16%, transparent) 14px);
  border: 1px dashed var(--locked); border-radius: var(--radius); padding: 14px;
  color: var(--muted); font-size: 0.84rem; text-align: center;
}
.locked b { color: var(--ink); }

.empty { color: var(--muted); font-size: 0.86rem; font-style: italic; padding: 10px 0; }

/* timeline */
.tl { position: relative; margin: 10px 0 0; padding-left: 20px; }
.tl::before { content: ""; position: absolute; left: 4px; top: 4px; bottom: 4px; width: 2px; background: var(--line); }
.tl-item { position: relative; padding: 0 0 18px 0; }
.tl-item::before {
  content: ""; position: absolute; left: -20px; top: 6px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--panel); border: 2px solid var(--line);
}
.tl-item.science::before { border-color: var(--science); }
.tl-item.company::before { border-color: var(--company); }
.tl-item.financing::before { border-color: var(--financing); }
.tl-item.cut::before { background: var(--accent); border-color: var(--accent); }
.tl-cut {
  border-top: 2px dashed var(--accent); margin: 4px 0 18px; padding-top: 8px;
  color: var(--accent); font-size: 0.82rem; font-weight: 600;
}
.tl-date { font-size: 0.74rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.tl-title { font-size: 0.9rem; margin: 2px 0 4px; }

/* network */
.legend { display: flex; flex-wrap: wrap; gap: 13px; font-size: 0.78rem; color: var(--muted); margin-bottom: 12px; }
.legend span { display: inline-flex; align-items: center; gap: 5px; }
.swatch { width: 11px; height: 11px; border-radius: 3px; }
.netwrap { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow-x: auto; }
svg { display: block; width: 100%; height: auto; min-width: 640px; }
.edge { stroke: var(--line); stroke-width: 1.4; }
.edge.patent { stroke: var(--science); stroke-width: 1.8; }
.edge.founder { stroke: var(--company); stroke-width: 1.8; }
.node-label {
  font-size: 11px; fill: var(--ink);
  paint-order: stroke; stroke: var(--panel); stroke-width: 3.5px; stroke-linejoin: round;
}
.node-sub {
  font-size: 9px; fill: var(--muted);
  paint-order: stroke; stroke: var(--panel); stroke-width: 3px; stroke-linejoin: round;
}
.edge:hover { stroke: var(--accent); stroke-width: 2.6; }

ul.edgelist { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); }
ul.edgelist li {
  font-size: 0.8rem; background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 10px; display: flex; flex-wrap: wrap; gap: 5px; align-items: baseline;
}
.e-from, .e-to { font-weight: 600; }
.e-rel { color: var(--muted); }
ul.edgelist .refs { display: inline-flex; gap: 4px; margin-left: auto; }

/* brief */
.brief-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin-bottom: 20px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.stat .n { font-size: 1.7rem; font-weight: 600; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.stat .n.none { font-size: 1.15rem; color: var(--gap); }
.stat .k { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 4px; }
.stat p { font-size: 0.79rem; color: var(--muted); margin: 6px 0 0; }
ul.claims { list-style: none; padding: 0; margin: 0 0 6px; }
ul.claims li { border-left: 3px solid var(--line); padding: 7px 0 7px 12px; margin-bottom: 9px; font-size: 0.88rem; }
ul.claims li.obs { border-left-color: var(--science); }
ul.claims li.inf { border-left-color: var(--company); }
ul.claims li.not { border-left-color: var(--gap); }
ul.claims .refs { margin-top: 5px; display: flex; gap: 6px; flex-wrap: wrap; }
ol.q { padding-left: 20px; }
ol.q li { margin-bottom: 7px; font-size: 0.88rem; }
.headline {
  font-size: 1.02rem; line-height: 1.45; background: var(--panel); border: 1px solid var(--line);
  border-left: 3px solid var(--accent); border-radius: var(--radius); padding: 14px; margin: 0 0 18px;
}
footer {
  border-top: 1px solid var(--line); background: var(--panel);
}
footer p { max-width: 1120px; margin: 0 auto; padding: 16px; font-size: 0.78rem; color: var(--muted); }
code { font-size: 0.92em; background: var(--bg); padding: 1px 4px; border-radius: 4px; border: 1px solid var(--line); }

@media (max-width: 640px) {
  .bar { flex-direction: column; align-items: stretch; }
  main { padding: 18px 16px 32px; }
  .cards { grid-template-columns: 1fr; }
}

.caveat.post {
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}
.caveat.post b { color: var(--accent); }