:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #191613;
  --surface: #ffffff;
  --muted: #6f6761;
  --line: rgba(25, 22, 19, 0.1);
  --line-strong: rgba(25, 22, 19, 0.18);
  --panel: #ffffff;
  --panel-hover: color-mix(in oklab, var(--surface), var(--fg) 4%);
  --accent: #6d4b3e;
  --accent-soft: rgba(109, 75, 62, 0.08);
  --ok: #28724f;
  --bad: #a33a34;
  --warn: #916720;
  --page-pad-x: clamp(18px, 5vw, 44px);
  --page-pad-y: clamp(26px, 5vw, 64px);
  --page-gap: clamp(28px, 5vw, 58px);
  --content-max: 1040px;
  --wide-max: 1180px;
  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", serif;
  --sans: "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11100f;
    --fg: #f2ece5;
    --surface: #171513;
    --muted: #b9afa4;
    --line: rgba(242, 236, 229, 0.12);
    --line-strong: rgba(242, 236, 229, 0.22);
    --panel: #171513;
    --panel-hover: color-mix(in oklab, var(--surface), var(--fg) 8%);
    --accent: #ddb39c;
    --accent-soft: rgba(221, 179, 156, 0.12);
    --ok: #75c69b;
    --bad: #e17b73;
    --warn: #ddb35e;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 var(--sans);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.page,
.article-page {
  display: grid;
  gap: var(--page-gap);
  margin: 0 auto;
  max-width: var(--content-max);
  min-height: 100vh;
  padding: var(--page-pad-y) var(--page-pad-x);
}

.page.is-wide {
  max-width: var(--wide-max);
}

.site-nav {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
}

.brand,
.site-nav a {
  color: inherit;
  text-decoration: none;
}

.brand {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
}

.site-nav nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: flex-end;
}

.site-nav nav a {
  color: var(--muted);
}

.site-nav nav a:hover,
.site-nav nav a[aria-current="page"] {
  color: var(--accent);
}

.intro,
.hero {
  display: grid;
  gap: 18px;
}

.eyebrow {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

h1 {
  font-family: var(--serif);
  font-size: clamp(54px, 10vw, 116px);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 0.9;
}

.summary,
.lead {
  color: var(--muted);
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.35;
  max-width: 48ch;
}

.panel,
.metric,
.infra-metric,
.infra-card {
  background: transparent;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
}

.panel {
  padding-top: 18px;
}

.panel h2,
.panel h3 {
  line-height: 1.2;
}

.panel p,
.panel li {
  color: var(--muted);
}

button,
input {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

@media (max-width: 640px) {
  .site-nav {
    align-items: flex-start;
  }

  .site-nav nav {
    gap: 12px;
  }
}