:root {
  color-scheme: light;
  --ink: #1f2328;
  --muted: #59636e;
  --paper: #ffffff;
  --surface: #f6f8fa;
  --line: #d0d7de;
  --accent: #0969da;
  --accent-dark: #0550ae;
  --green: #1a7f37;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); }
a { color: var(--accent); text-underline-offset: .18em; }
a:hover { color: var(--accent-dark); }
code { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .92em; }
:focus-visible { outline: 3px solid #1b76d1; outline-offset: 3px; }
.skip-link { position: absolute; left: 1rem; top: -5rem; padding: .7rem 1rem; background: var(--ink); color: white; z-index: 10; }
.skip-link:focus { top: 1rem; }
.site-header { border-bottom: 1px solid var(--line); background: rgba(255, 255, 255, .96); position: sticky; top: 0; z-index: 5; }
.nav-shell { max-width: 76rem; margin: auto; padding: .8rem clamp(1rem, 4vw, 3rem); display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { color: var(--ink); text-decoration: none; font-weight: 650; letter-spacing: -.02em; display: inline-flex; align-items: center; gap: .65rem; }
.brand-logo { width: 2rem; height: 2rem; object-fit: cover; border-radius: 50%; border: 1px solid var(--line); background: #fff; }
.brand small { display: block; color: var(--muted); font-size: .7rem; font-weight: 500; letter-spacing: .04em; }
.menu-button { display: none; min-height: 2.75rem; min-width: 2.75rem; border: 1px solid var(--line); border-radius: .45rem; padding: .45rem .75rem; background: var(--paper); color: var(--ink); font: inherit; }
.site-nav { display: flex; gap: 1.1rem; align-items: center; }
.site-nav a { color: var(--muted); text-decoration: none; font-size: .9rem; min-height: 2.75rem; display: inline-flex; align-items: center; }
.site-nav a:hover { color: var(--accent); }
.layout { max-width: 76rem; margin: auto; padding: clamp(1.5rem, 3vw, 3rem) clamp(1rem, 4vw, 3rem); }
.repo-hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(17rem, .7fr); gap: clamp(2rem, 8vw, 8rem); align-items: start; padding: 1.5rem 0 clamp(2.5rem, 5vw, 4rem); }
.command-hero { max-width: 58rem; padding: 2rem 0 4rem; }
.eyebrow { color: var(--muted); font-size: .74rem; font-weight: 650; letter-spacing: .1em; text-transform: uppercase; }
h1, h2, h3 { letter-spacing: -.035em; line-height: 1.15; margin: 0; }
h1 { max-width: 14ch; font-size: clamp(2.7rem, 6vw, 5.5rem); font-weight: 650; }
h2 { font-size: clamp(1.7rem, 3vw, 2.6rem); font-weight: 600; }
h3 { font-size: 1.05rem; }
.hero-copy, .lead { max-width: 44rem; color: var(--muted); font-size: clamp(1.05rem, 1.8vw, 1.22rem); }
.source-line { color: var(--muted); font-size: .9rem; }
.status-panel { border: 1px solid var(--line); border-radius: .4rem; padding: 1.25rem; background: var(--surface); color: var(--muted); }
.status-panel strong { display: block; color: var(--ink); margin: .55rem 0 .2rem; }
.status-panel span, .status-panel a { display: block; }
.section { border-top: 1px solid var(--line); padding: clamp(3rem, 6vw, 5rem) 0; }
.section-rule { border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 2rem; }
.section-heading p { max-width: 38rem; color: var(--muted); margin: 0; }
.overview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.overview-grid article { border-top: 2px solid var(--ink); padding-top: 1rem; }
.overview-grid h3 { margin-top: .45rem; }
.overview-grid p { color: var(--muted); }
.model-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; padding: 0; margin: 0; list-style: none; border-top: 2px solid var(--ink); }
.model-steps li { min-height: 8rem; padding: 1rem; border-right: 1px solid var(--line); }
.model-steps li:first-child { padding-left: 0; }
.model-steps li:last-child { border-right: 0; }
.model-steps strong, .model-steps span { display: block; }
.model-steps strong { font-size: .78rem; letter-spacing: .08em; }
.model-steps span { color: var(--muted); margin-top: .6rem; font-size: .92rem; }
.stat-grid, .evidence-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.stat, .evidence-grid article { border: 1px solid var(--line); border-radius: .4rem; padding: 1.25rem; background: var(--surface); }
.stat strong { display: block; font-size: 2.1rem; line-height: 1; font-weight: 650; }
.stat span { display: block; color: var(--muted); min-height: 3.2rem; margin: .7rem 0 1rem; }
.stat a, .evidence-grid a { font-size: .9rem; }
.provenance-line { color: var(--muted); font-size: .82rem; margin: 1rem 0 0; }
.evidence-grid article p { color: var(--muted); }
.content-section { padding: 1rem 0 4rem; }
.legal-page { max-width: 58rem; }
.legal-page h1 { max-width: none; font-size: clamp(2.3rem, 5vw, 4.4rem); }
.legal-page h2 { margin-top: 2.5rem; margin-bottom: .8rem; }
.legal-page h3 { margin-top: 1.6rem; margin-bottom: .35rem; }
.legal-page p, .legal-page li { color: var(--muted); max-width: 48rem; }
.legal-page ul { padding-left: 1.25rem; }
.legal-status { border-left: 4px solid #cf222e; background: #fff1f2; padding: 1rem 1.25rem; margin: 1.5rem 0 2rem; }
.legal-status strong { color: #82071e; display: block; margin-bottom: .25rem; }
.legal-nav { display: flex; flex-wrap: wrap; gap: .7rem 1.2rem; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 1rem 0; margin: 1.5rem 0 2rem; }
.legal-nav a { font-size: .9rem; }
.breadcrumbs { display: flex; gap: .6rem; align-items: center; color: var(--muted); font-size: .85rem; margin-bottom: 2rem; }
.breadcrumbs a { color: var(--accent); }
.related-records { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1.2rem; border-top: 1px solid var(--line); padding: 1.25rem 0 2.5rem; }
.related-records h2 { width: 100%; font-size: 1.05rem; }
.related-records a { font-size: .9rem; }
.evidence-figure { margin: 2rem 0 0; }
.evidence-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: .4rem; }
.evidence-figure figcaption { color: var(--muted); font-size: .85rem; margin-top: .6rem; }
.footer { border-top: 1px solid var(--line); padding: 2rem 0 4rem; color: var(--muted); font-size: .85rem; }

@media (max-width: 48rem) {
  .menu-button { display: inline-flex; }
  .site-nav { display: none; position: absolute; left: 1rem; right: 1rem; top: calc(100% + .5rem); padding: .5rem; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border: 1px solid var(--line); border-radius: .4rem; box-shadow: 0 .5rem 1.5rem rgba(31,35,40,.12); }
  .site-nav[data-open="true"] { display: flex; }
  .site-nav a { padding: .7rem; }
  .repo-hero { display: block; padding-bottom: 4rem; }
  h1 { margin-top: .55rem; }
  .hero-copy, .lead { margin: 1.35rem 0; }
  .status-panel { margin-top: 2rem; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 1rem; }
  .overview-grid { grid-template-columns: 1fr; }
  .model-steps { grid-template-columns: 1fr; border-top: 2px solid var(--ink); }
  .model-steps li, .model-steps li:first-child { min-height: 0; padding: 1rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .stat-grid, .evidence-grid { grid-template-columns: 1fr; }
  .stat span { min-height: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (prefers-contrast: more) {
  :root { --ink: #111418; --muted: #3d4650; --line: #8c959f; --accent: #004fbd; }
  .status-panel, .stat, .evidence-grid article { border-color: var(--ink); }
}