:root {
  --ink: #172126;
  --muted: #53656d;
  --paper: #f7f6f1;
  --panel: #ffffff;
  --accent: #007d78;
  --accent-dark: #075854;
  --rule: #d7dfdd;
  --warm: #9c5b27;
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.62;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); }
a { color: var(--accent-dark); text-underline-offset: 0.16em; }
a:hover { color: var(--accent); }
.skip { position: absolute; left: 1rem; top: -5rem; z-index: 10; background: white; padding: 0.5rem; }
.skip:focus { top: 0.5rem; }
code, pre { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; }
code { font-size: 0.92em; overflow-wrap: anywhere; }

.site-header {
  border-bottom: 1px solid var(--rule);
  background: rgba(247, 246, 241, 0.96);
  position: sticky;
  top: 0;
  z-index: 5;
}
.nav, main, .site-footer { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.nav { min-height: 4rem; display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.1rem; padding-block: 0.6rem; }
.brand { margin-right: auto; font-weight: 760; letter-spacing: -0.02em; text-decoration: none; }
.nav a:not(.brand) { font-size: 0.94rem; text-decoration: none; }

main { padding-block: 3.8rem 5rem; }
.hero { display: grid; grid-template-columns: 1.45fr 0.75fr; gap: 3rem; align-items: start; }
.eyebrow { color: var(--accent-dark); font-weight: 720; letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.76rem; }
h1, h2, h3 { line-height: 1.17; letter-spacing: -0.025em; }
h1 { font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.65rem, 7vw, 5.4rem); margin: 0.18em 0 0.32em; font-weight: 500; }
h2 { font-size: clamp(1.55rem, 3vw, 2.25rem); margin-top: 2.3em; }
h3 { margin-top: 1.8em; }
.lead { font-size: clamp(1.12rem, 2vw, 1.35rem); max-width: 48rem; color: #34464d; }
.status, .card { border: 1px solid var(--rule); background: var(--panel); border-radius: 0.8rem; }
.status { padding: 1.3rem 1.4rem; box-shadow: 0 12px 32px rgba(17, 49, 50, 0.06); }
.status strong { color: var(--accent-dark); }
.status h2 { margin-top: 0.3rem; font-size: 1.7rem; }
.status dl { margin: 1rem 0 0; }
.status dt { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); }
.status dd { margin: 0 0 0.8rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.6rem; }
.button { display: inline-block; border: 1px solid var(--accent-dark); border-radius: 999px; padding: 0.58rem 1rem; text-decoration: none; font-weight: 650; }
.button.primary { background: var(--accent-dark); color: white; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.card { padding: 1.2rem 1.35rem; }
.card h3 { margin-top: 0; }
.tag { color: var(--warm); font-size: 0.78rem; font-weight: 720; letter-spacing: 0.05em; text-transform: uppercase; }
.math-panel { margin: 1.5rem 0; padding: 1.35rem 1.5rem; border-left: 4px solid var(--accent); background: #eef6f4; overflow-x: auto; }
.note { border-left: 3px solid var(--warm); padding-left: 1rem; color: #4a4641; }
table { width: 100%; border-collapse: collapse; background: var(--panel); font-size: 0.94rem; }
th, td { border-bottom: 1px solid var(--rule); padding: 0.82rem; text-align: left; vertical-align: top; }
th { color: var(--muted); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.05em; }
pre { padding: 1rem; border-radius: 0.6rem; background: #19272c; color: #e9f2f0; overflow-x: auto; }
.flow { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.9rem; align-items: stretch; }
.flow .card { position: relative; }
.flow .card:not(:last-child)::after { content: "→"; position: absolute; right: -0.78rem; top: 42%; color: var(--accent); font-size: 1.25rem; }
.site-footer { border-top: 1px solid var(--rule); padding-block: 1.8rem 3rem; color: var(--muted); font-size: 0.9rem; }

@media (max-width: 760px) {
  .site-header { position: static; }
  .nav { flex-wrap: wrap; padding-block: 0.8rem; gap: 0.8rem 1rem; }
  .brand { width: 100%; }
  .hero, .grid, .flow { grid-template-columns: 1fr; }
  .flow .card::after { display: none; }
  main { padding-top: 2.3rem; }
  table { display: block; overflow-x: auto; }
}