:root {
  color-scheme: light;
  --ink: #17231f;
  --muted: #53635d;
  --paper: #f7f8f4;
  --surface: #ffffff;
  --accent: #176b57;
  --accent-dark: #0f4d40;
  --line: #d8e0da;
  --focus: #c56b18;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}
a { color: var(--accent-dark); }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
.container { width: min(100% - 2rem, 70rem); margin-inline: auto; }
.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 0; }
.brand { color: var(--ink); font-weight: 750; text-decoration: none; letter-spacing: .01em; }
.nav-links { display: flex; flex-wrap: wrap; gap: 1rem 1.25rem; margin: 0; padding: 0; list-style: none; }
.nav-links a { font-size: .95rem; font-weight: 650; }
main { padding: 4.5rem 0; }
.hero { max-width: 48rem; padding: 3rem 0 4rem; }
.eyebrow { color: var(--accent-dark); font-size: .8rem; font-weight: 750; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; }
h1 { max-width: 13ch; margin: .5rem 0 1.25rem; font-size: clamp(2.6rem, 8vw, 5rem); }
h2 { margin-top: 2.5rem; font-size: clamp(1.65rem, 4vw, 2.2rem); }
h3 { margin-top: 2rem; font-size: 1.25rem; }
.lede { max-width: 42rem; color: var(--muted); font-size: clamp(1.15rem, 2.5vw, 1.4rem); }
.cta { display: inline-block; margin-top: 1.25rem; padding: .75rem 1.1rem; color: #fff; background: var(--accent); border-radius: .35rem; font-weight: 700; text-decoration: none; }
.cta:hover { background: var(--accent-dark); }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; margin-top: 2rem; }
.card { padding: 1.4rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--surface); }
.card h2 { margin-top: 0; font-size: 1.35rem; }
.prose { max-width: 48rem; }
.prose h1 { max-width: none; font-size: clamp(2.2rem, 6vw, 3.75rem); }
.prose p { max-width: 48rem; }
.site-footer { padding: 2rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .95rem; }
@media (max-width: 40rem) { .card-grid { grid-template-columns: 1fr; } main { padding-top: 2.5rem; } }