:root {
  --paper: #f3f1ec;
  --ink: #171717;
  --muted: #6d6559;
  --rule: #b8b4ab;
  --safe-stop: #d79c35;
  --accent: #355c52;
  --serif: Iowan Old Style, Palatino Linotype, Book Antiqua, Georgia, serif;
  --mono: SFMono-Regular, Menlo, Monaco, Consolas, Liberation Mono, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.55;
}

a { color: inherit; text-underline-offset: 0.2em; }

.site-header,
footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.35rem 2rem;
  border-bottom: 1px solid var(--rule);
  color: var(--muted);
  font: 700 0.68rem/1.2 var(--mono);
  letter-spacing: 0.08em;
}

.wordmark { color: var(--ink); text-decoration: none; }

main { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(290px, 0.75fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: end;
  min-height: min(740px, calc(100vh - 63px));
  padding: clamp(5rem, 12vw, 10rem) 0 clamp(4rem, 8vw, 7rem);
}

.eyebrow,
.card-label,
.sheet-meta {
  margin: 0 0 0.9rem;
  color: var(--accent);
  font: 700 0.72rem/1.2 var(--mono);
  letter-spacing: 0.08em;
}

h1,
h2,
h3,
p { margin-top: 0; }

h1,
h2 { font-weight: 600; letter-spacing: -0.035em; line-height: 0.95; }

h1 { max-width: 720px; margin-bottom: 1.5rem; font-size: clamp(3.8rem, 8.5vw, 7.5rem); }
h2 { max-width: 800px; margin-bottom: 0; font-size: clamp(2.45rem, 5vw, 4.4rem); }
h3 { font-size: 1.25rem; line-height: 1.08; }

.lede { max-width: 560px; color: var(--muted); font-size: clamp(1.08rem, 2vw, 1.35rem); }

.hero-links { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; margin-top: 2rem; font: 700 0.78rem/1.2 var(--mono); }
.hero-links a { text-decoration-thickness: 1px; }

.evidence-card {
  align-self: center;
  padding: 1.45rem;
  border: 1px solid var(--ink);
  background: #e9e5db;
}

.run-time { margin-bottom: 1.35rem; font: 700 1.25rem/1.22 var(--mono); }
.status { display: inline-block; margin-bottom: 1.7rem; padding: 0.38rem 0.55rem; background: var(--safe-stop); color: #2d2109; font: 700 0.78rem/1 var(--mono); letter-spacing: 0.04em; }
.card-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; margin: 0; }
.card-facts div { padding-top: 0.75rem; border-top: 1px solid var(--rule); }
.card-facts dt { color: var(--muted); font: 700 0.62rem/1.2 var(--mono); letter-spacing: 0.08em; }
.card-facts dd { margin: 0.25rem 0 0; font: 700 0.72rem/1.2 var(--mono); }
.card-note { margin: 1.4rem 0 0; color: var(--muted); font-size: 0.88rem; }

.content-section { padding: clamp(4.5rem, 10vw, 8rem) 0; border-top: 1px solid var(--rule); }
.section-heading { display: grid; grid-template-columns: minmax(160px, 0.35fr) 1fr; gap: 1.5rem; margin-bottom: clamp(2.4rem, 6vw, 4.5rem); }
.section-heading .eyebrow { padding-top: 0.5rem; }

.trace-list { max-width: 850px; margin: 0 0 0 auto; padding: 0; list-style: none; }
.trace-list li { display: grid; grid-template-columns: 110px 1fr; gap: 1.25rem; padding: 1.35rem 0; border-top: 1px solid var(--rule); }
.trace-list time { color: var(--accent); font: 700 0.78rem/1.3 var(--mono); }
.trace-list strong { display: block; margin-bottom: 0.22rem; }
.trace-list span { color: var(--muted); }

.output-sheet { max-width: 760px; margin: 0 auto; padding: clamp(1.6rem, 4vw, 3rem); border: 1px solid var(--rule); background: #faf8f3; }
.output-sheet h3 { font-size: clamp(1.55rem, 3vw, 2.35rem); }
.output-sheet p:not(.sheet-meta) { max-width: 640px; }
.sheet-foot { margin: 2rem 0 0 !important; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font: 0.72rem/1.4 var(--mono); }

.capability-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.capability-grid article { min-height: 280px; padding: clamp(1.35rem, 3vw, 2.4rem); border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.capability-grid article p:not(.card-label) { color: var(--muted); }
.capability-grid span { display: block; margin-top: 2.5rem; color: var(--accent); font: 700 0.68rem/1.35 var(--mono); letter-spacing: 0.04em; }

.boundary-table { border-top: 1px solid var(--ink); }
.boundary-row { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; border-bottom: 1px solid var(--rule); }
.boundary-row > * { margin: 0; padding: 1rem 0; }
.boundary-head { color: var(--muted); font: 700 0.68rem/1.3 var(--mono); letter-spacing: 0.08em; }
.boundary-row p:last-child { color: var(--muted); }

.verification-copy { max-width: 770px; margin-left: auto; }
.verification-copy p { margin-bottom: 1.25rem; }

footer { margin-top: clamp(3rem, 8vw, 6rem); border-top: 1px solid var(--rule); border-bottom: 0; }

@media (max-width: 720px) {
  body { font-size: 17px; }
  .site-header, footer { padding: 1.1rem 1.2rem; }
  .site-header span { display: none; }
  main { padding: 0 1.2rem; }
  .hero { display: block; min-height: auto; padding: 5rem 0 4rem; }
  .evidence-card { margin-top: 3rem; }
  .section-heading { display: block; }
  .section-heading .eyebrow { padding-top: 0; }
  .trace-list { margin-left: 0; }
  .trace-list li { grid-template-columns: 68px 1fr; }
  .capability-grid { grid-template-columns: 1fr; }
  .boundary-row { grid-template-columns: 1fr; gap: 0; }
  .boundary-row > * { padding: 1rem 0 0; }
  .boundary-row > *:last-child { padding-bottom: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}