:root {
  --paper: #f4efe6;
  --paper-2: #ebe4d6;
  --ink: #1c1915;
  --muted: #5c564c;
  --line: #d9d0c1;
  --copper: #8f3d24;
  --copper-soft: #f3e4dc;
  --evidence: #1f4d3a;
  --evidence-bg: #e5f0ea;
  --research: #1e3a5f;
  --research-bg: #e6eef6;
  --assumption: #6b4e12;
  --assumption-bg: #f7efd8;
  --judgment: #6b2d3c;
  --judgment-bg: #f6e6ea;
  --serif: "Source Serif 4", "Iowan Old Style", Palatino, Georgia, serif;
  --sans: "Public Sans", "Avenir Next", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --nav: 220px;
  --max: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
}
a { color: var(--copper); }
a:hover { text-decoration-thickness: 2px; }

.layout {
  display: grid;
  grid-template-columns: var(--nav) 1fr;
  min-height: 100vh;
}
nav {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px 18px 28px 22px;
  border-right: 1px solid var(--line);
  background: #efe8dc;
  overflow: auto;
}
.brand {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 22px;
}
.brand strong {
  display: block;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0;
  text-transform: none;
  font-weight: 560;
  margin-top: 4px;
}
nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
nav a {
  display: block;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  padding: 6px 0;
}
nav a:hover { color: var(--copper); }
nav .group {
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

main {
  padding: 48px 8vw 96px;
  max-width: calc(var(--max) + 16vw);
}
header.hero { max-width: var(--max); margin-bottom: 28px; }
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--copper);
  margin: 0 0 12px;
}
h1 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}
.lede {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.35;
  margin: 0;
}
.meta {
  margin-top: 18px;
  color: var(--muted);
  font-size: 14px;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 28px 0 8px;
}
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: 999px;
  vertical-align: 1px;
  margin-right: 6px;
}
.tag.evidence { background: var(--evidence-bg); color: var(--evidence); }
.tag.research { background: var(--research-bg); color: var(--research); }
.tag.assumption { background: var(--assumption-bg); color: var(--assumption); }
.tag.judgment { background: var(--judgment-bg); color: var(--judgment); }

section {
  max-width: var(--max);
  padding-top: 42px;
  margin-top: 12px;
  border-top: 1px solid var(--line);
}
h2 {
  font-family: var(--serif);
  font-weight: 560;
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.08em;
}
.conclusion {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.35;
  margin: 8px 0 16px;
}
p { margin: 0 0 12px; }
ul { margin: 0 0 12px; padding-left: 1.15em; }
li { margin: 0 0 6px; }
.muted { color: var(--muted); }

.card, .message, .callout {
  background: white;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 18px 8px;
  margin: 14px 0;
}
.card h3, .message h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 560;
  margin: 0 0 8px;
}
.message {
  background: #fffdf8;
}
.message pre {
  white-space: pre-wrap;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.45;
  margin: 0 0 12px;
}
button.copy {
  font-family: var(--sans);
  font-size: 14px;
  background: var(--ink);
  color: var(--paper);
  border: 0;
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  margin-bottom: 12px;
}
button.copy:hover { background: var(--copper); }
.callout {
  background: var(--copper-soft);
  border-color: #e4cfc4;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  margin: 8px 0 16px;
}
th, td {
  text-align: left;
  vertical-align: top;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
}
th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}

.say {
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.25;
  margin: 8px 0 16px;
}

footer {
  max-width: var(--max);
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}
footer ul { padding-left: 1.1em; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  nav {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  nav ol { display: flex; flex-wrap: wrap; gap: 8px 14px; }
  main { padding: 28px 20px 72px; }
}