:root {
  color-scheme: light;
  --ink: #18201b;
  --muted: #5f6b63;
  --line: #dfe7e1;
  --brand: #197a55;
  --soft: #f3f8f4;
  --paper: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: var(--brand); }
a:hover { text-decoration-thickness: 2px; }

.shell {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  color: var(--ink);
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -.03em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 15px;
}

main { padding: 64px 0 80px; }

h1, h2 { letter-spacing: -.035em; line-height: 1.2; }
h1 { margin: 0 0 12px; font-size: clamp(38px, 7vw, 58px); }
h2 { margin: 42px 0 12px; font-size: 27px; }
h3 { margin: 26px 0 8px; font-size: 20px; }
p, ul { margin: 0 0 18px; }
ul { padding-left: 24px; }
li + li { margin-top: 8px; }

.lede { color: var(--muted); font-size: 20px; max-width: 650px; }
.updated { color: var(--muted); font-size: 15px; margin-top: 16px; }

.card {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  margin: 32px 0;
  padding: 24px;
}

.card h2, .card h3 { margin-top: 0; }
.grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.grid a { background: var(--soft); border: 1px solid var(--line); border-radius: 16px; color: var(--ink); font-weight: 650; padding: 22px; text-decoration: none; }
.grid a span { color: var(--muted); display: block; font-size: 14px; font-weight: 400; margin-top: 4px; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 24px 0 40px; }

@media (max-width: 600px) {
  nav { align-items: flex-start; flex-direction: column; }
  main { padding-top: 44px; }
  .grid { grid-template-columns: 1fr; }
}