/* Overview — a field guide's index on graphite. Every tool appears in its own colour;
   the page itself stays neutral so twenty accents read as a set, not a rainbow.
   Display: Bricolage Grotesque. Text: Instrument Sans. Labels: Martian Mono. */

:root {
  --page-bg: #0e1012;
  --page-text: #e8eaed;
  --page-muted: #a1a8b1;
  --page-line: #262a30;
  --page-accent: #f2f4f6;
  --page-ui: "Instrument Sans", system-ui, sans-serif;
  --raise: #14171a;
  --faint: #8a929b;
  --display: "Bricolage Grotesque", "Instrument Sans", system-ui, sans-serif;
  --mono: "Martian Mono", ui-monospace, monospace;
  --measure: 66ch;
  color-scheme: dark;
}

html { background: var(--page-bg); }
body { color: var(--page-text); font: 16.5px/1.62 var(--page-ui); }
a { color: inherit; text-underline-offset: 3px; text-decoration-color: color-mix(in srgb, currentColor 45%, transparent); }
a:hover { text-decoration-color: currentColor; }
:focus-visible { outline: 2px solid var(--page-accent); outline-offset: 3px; border-radius: 2px; }
code { font: 0.86em var(--mono); background: var(--raise); border: 1px solid var(--page-line); border-radius: 4px; padding: 0.08em 0.36em; }
::selection { background: #3a3f47; }

main { max-width: 1120px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 48px); }

/* ── hero ─────────────────────────────────────────────────────────────────── */
.hero { padding: clamp(40px, 8vh, 88px) 0 28px; }
.kicker { margin: 0 0 14px; font: 500 12px/1 var(--mono); letter-spacing: 0.08em; color: var(--faint); }
.hero h1 {
  margin: 0; max-width: 14ch; font: 760 clamp(44px, 7.4vw, 92px)/0.96 var(--display);
  letter-spacing: -0.035em; font-variation-settings: "opsz" 96;
}
.lede { max-width: var(--measure); margin: 22px 0 0; font-size: clamp(17px, 1.5vw, 19px); color: #c9ced5; }
.count { display: flex; flex-wrap: wrap; gap: 8px 28px; list-style: none; margin: 28px 0 0; padding: 0; color: var(--page-muted); font-size: 14px; }
.count b { font: 700 22px/1 var(--display); color: var(--page-text); margin-right: 6px; font-variant-numeric: tabular-nums; }

/* ── section heads ────────────────────────────────────────────────────────── */
.section-h {
  display: flex; align-items: center; gap: 14px; margin: 64px 0 22px;
  font: 500 11.5px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--page-muted);
}
.section-h::after { content: ""; flex: 1; height: 1px; background: var(--page-line); }

/* ── catalogue ────────────────────────────────────────────────────────────── */
.cat-group + .cat-group { margin-top: 30px; }
.cat-group h3 { margin: 0 0 10px; font: 650 15px/1.2 var(--display); color: var(--page-muted); letter-spacing: 0.01em; }
.cat-list { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 0 32px; border-top: 1px solid var(--page-line); }
.cat-tool {
  position: relative; display: grid; grid-template-columns: 44px minmax(0, 1fr); column-gap: 14px;
  padding: 16px 0 15px; border-bottom: 1px solid var(--page-line);
}
.cat-link { display: contents; text-decoration: none; }
.cat-glyph {
  grid-row: 1 / span 3; width: 44px; height: 44px; padding: 11px; border-radius: 10px;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 13%, var(--page-bg));
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent);
}
.cat-link b { font: 700 21px/1.15 var(--display); letter-spacing: -0.01em; align-self: end; }
.cat-link span { color: var(--page-muted); font-size: 14.5px; line-height: 1.45; margin-top: 3px; }
.cat-link::after { content: ""; position: absolute; inset: 0; }
.cat-tool:hover b { color: var(--accent); }
.cat-surf { grid-column: 2; display: flex; flex-wrap: wrap; gap: 5px; list-style: none; margin: 9px 0 0; padding: 0; }
.cat-surf li { font: 500 10px/1 var(--mono); letter-spacing: 0.03em; color: var(--faint); border: 1px solid var(--page-line); border-radius: 3px; padding: 4px 6px; }
.cat-app {
  position: absolute; z-index: 1; right: 0; top: 16px; font: 600 12.5px/1 var(--page-ui); text-decoration: none;
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); border-radius: 999px; padding: 6px 10px;
}
.cat-app:hover { background: color-mix(in srgb, var(--accent) 14%, transparent); }

/* ── essays ───────────────────────────────────────────────────────────────── */
.essay > p { max-width: var(--measure); color: #cfd3d9; }
.fig { margin: 26px 0 0; }
.fig svg { display: block; width: 100%; height: auto; }
.fig figcaption { margin-top: 10px; font-size: 14px; color: var(--page-muted); max-width: var(--measure); }
.fig figcaption b { color: var(--page-text); font-weight: 600; }

/* ── surfaces matrix ──────────────────────────────────────────────────────── */
.matrix-wrap { overflow-x: auto; margin-top: 22px; }
.matrix { border-collapse: collapse; min-width: 640px; width: 100%; font-size: 14px; }
.matrix th, .matrix td { border-bottom: 1px solid var(--page-line); padding: 8px 10px; text-align: center; }
.matrix thead th { font: 500 10.5px/1.2 var(--mono); color: var(--page-muted); letter-spacing: 0.04em; vertical-align: bottom; }
.matrix tbody th { text-align: left; font-weight: 600; white-space: nowrap; }
.matrix tbody th a { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; }
.matrix tbody th .glyph { color: var(--accent); }
.matrix td i { display: inline-block; width: 9px; height: 9px; border-radius: 50%; background: var(--accent); }
.matrix tbody tr:hover { background: var(--raise); }

/* ── drawings ─────────────────────────────────────────────────────────────── */
.dg { --k: #cfd5dc; overflow: visible; }
.dg text { font-family: var(--page-ui); fill: var(--page-text); }
.dg .m { font-family: var(--mono); }
.dg .k-ink { --k: #cfd5dc; } .dg .k-accent { --k: #f2f4f6; }
.dg .k-a { --k: #ffc45c; } .dg .k-b { --k: #5fd3c6; } .dg .k-c { --k: #8fb3ff; } .dg .k-d { --k: #3ddc84; }
.dg .k-ok { --k: #8fe0a5; } .dg .k-warn { --k: #f2b84b; } .dg .k-err { --k: #ff7b72; }
.dg .k-muted { --k: #6f7680; } .dg .k-file { --k: #a1a8b1; }
.dg .node { fill: #15181c; stroke: var(--k); stroke-width: 1.5; }
.dg .node.solid { fill: var(--k); }
.dg .node.ghost { stroke-dasharray: 4 3; fill: none; }
.dg .shadow { fill: color-mix(in srgb, var(--k) 22%, transparent); stroke: none; }
.dg .lbl { fill: var(--page-text); font-weight: 600; }
.dg .sub { fill: var(--page-muted); }
.dg .cap { fill: var(--k); font-family: var(--mono); letter-spacing: 0.08em; }
.dg .edge { fill: none; stroke: var(--k); }
.dg .edge.dash { stroke-dasharray: 6 4; }
.dg .edge.dot { stroke-dasharray: 1.5 4; stroke-linecap: round; }
.dg .tip { fill: var(--k); stroke: none; }
.dg .tip.open { fill: none; stroke: var(--k); stroke-width: 1.5; }
.dg .lab-bg { fill: var(--page-bg); }
.dg .elabel { fill: color-mix(in srgb, var(--k) 70%, var(--page-text)); }
.dg .halo { paint-order: stroke; stroke: var(--page-bg); stroke-width: 4px; stroke-linejoin: round; }
.dg .grp { fill: none; stroke: var(--k); stroke-width: 1; }
.dg .grp.dash { stroke-dasharray: 5 4; }
.dg .frame-tag { fill: var(--page-bg); stroke: var(--k); }
.dg .frame-tag-t { fill: var(--k); font-family: var(--mono); letter-spacing: 0.1em; }
.dg .band { fill: var(--k); }