:root {
  --ink: #142033;
  --ink-soft: #3d4a5c;
  --paper: #f4efe4;
  --paper-2: #fffdf8;
  --rule: #1e3a5f;
  --accent: #c45c1a;
  --chip: #e7e0d2;
  --chip-on: #1e3a5f;
  --chip-on-ink: #f4efe4;
  --line: rgba(20, 32, 51, 0.14);
  --shadow: 0 12px 40px rgba(20, 32, 51, 0.08);
  --mono: "IBM Plex Mono", "ui-monospace", "SFMono-Regular", Menlo, Consolas, monospace;
  --sans: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}

a { color: var(--rule); }
a:hover { color: var(--accent); }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 12px;
  top: 12px;
  background: var(--paper-2);
  padding: 8px 12px;
  z-index: 20;
}

.mast {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 10;
}
.mast-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.wordmark {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 13px;
  text-decoration: none;
  color: var(--rule);
}
.wordmark span { color: var(--accent); }
.nav { display: flex; gap: 18px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--ink-soft); }
.nav a[aria-current="page"],
.nav a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 28px 20px 72px; }
.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 8px 0 12px;
}
.lede { max-width: 46rem; color: var(--ink-soft); font-size: 18px; }
.meta-line { font-size: 13px; color: var(--ink-soft); margin: 0 0 8px; letter-spacing: 0.04em; text-transform: uppercase; }

.filters {
  margin: 28px 0 18px;
  padding: 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
}
.filters .field:first-child { grid-column: 1 / -1; }
label.field { display: flex; flex-direction: column; gap: 6px; font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
input[type="search"], select {
  font: inherit;
  font-size: 14px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  padding: 8px 10px;
  width: 100%;
}
input[type="search"]:focus, select:focus { outline: 2px solid var(--rule); outline-offset: 1px; }

.count { font-size: 13px; color: var(--ink-soft); margin: 0 0 16px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--paper-2);
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  min-height: 100%;
  transition: transform 120ms ease, box-shadow 120ms ease;
}
.card:hover, .card:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  outline: 2px solid var(--rule);
}
.thumb {
  aspect-ratio: 16 / 10;
  background: #e4ddd0;
  overflow: hidden;
  display: grid;
  place-items: center;
  border-bottom: 1px solid var(--line);
}
.thumb img, .thumb svg { width: 100%; height: 100%; object-fit: cover; display: block; }
.thumb.contain img, .thumb.contain svg { object-fit: contain; background: #fff; }
.thumb.mermaid-ph {
  background:
    linear-gradient(180deg, #e8eef5, #d5deea);
  color: var(--rule);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}
.thumb.brief-ph {
  background:
    linear-gradient(180deg, #efe8d8, #e4ddd0);
  color: var(--ink-soft);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}
.card-body { padding: 14px 14px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.shelf-tag {
  align-self: flex-start;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--chip);
  padding: 3px 7px;
}
.card h2 { font-size: 18px; margin: 0; letter-spacing: -0.02em; }
.card p { margin: 0; color: var(--ink-soft); font-size: 14px; }

.empty { padding: 48px 8px; color: var(--ink-soft); }

.page-head { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 28px; margin-bottom: 36px; }
.page-head.no-sample { grid-template-columns: 1fr; }
@media (max-width: 800px) { .page-head { grid-template-columns: 1fr; } }
.sample {
  background: #fff;
  border: 1px solid var(--line);
  min-height: 220px;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.sample img, .sample svg { max-width: 100%; height: auto; display: block; }
.sample .mermaid { width: 100%; padding: 16px; }

.kicker { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 700; }
.fields { display: grid; gap: 22px; }
.fields h2 {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0 0 8px;
  color: var(--rule);
  border-bottom: 1px solid var(--line);
  padding-bottom: 6px;
}
.fields ul { margin: 0; padding-left: 1.1rem; }
.fields li { margin: 4px 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips a, .chip {
  display: inline-block;
  padding: 4px 8px;
  background: var(--chip);
  color: var(--ink);
  text-decoration: none;
  font-size: 13px;
}
.chips a:hover { background: var(--chip-on); color: var(--chip-on-ink); }
.rank { font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-right: 4px; }

pre, .skeleton {
  background: #142033;
  color: #f4efe4;
  padding: 14px 16px;
  overflow: auto;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.45;
  white-space: pre-wrap;
}
.sources { font-size: 14px; }
.sources li { margin: 6px 0; }

.steps { display: grid; gap: 18px; margin: 24px 0 32px; }
.step-list { display: flex; flex-wrap: wrap; gap: 8px; }
.step-list button {
  font: inherit;
  border: 1px solid var(--line);
  background: var(--paper-2);
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
}
.step-list button[aria-pressed="true"],
.step-list button:hover { background: var(--chip-on); color: var(--chip-on-ink); border-color: var(--chip-on); }
.picks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 800px) { .picks { grid-template-columns: 1fr; } }
.need-list { display: grid; gap: 8px; }
.need {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  background: var(--paper-2);
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
}
.need:hover { border-color: var(--rule); }
.need strong { display: block; }
.need span { font-size: 13px; color: var(--ink-soft); }
.anti { font-size: 14px; color: var(--ink-soft); }

footer.site {
  border-top: 1px solid var(--line);
  padding: 18px 20px 28px;
  max-width: var(--max);
  margin: 0 auto;
  font-size: 13px;
  color: var(--ink-soft);
}