:root {
  --ink: #1d2228;
  --muted: #5b6570;
  --line: #dfe4e8;
  --bg: #fbfcfd;
  --accent: #2f5d7c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

header {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

nav a {
  margin-left: 1rem;
  color: var(--muted);
  text-decoration: none;
}

nav a:hover { color: var(--accent); }

main { padding: 2.5rem 1.25rem 3rem; }

h1 {
  font-size: 1.9rem;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

h2 {
  font-size: 1.2rem;
  margin: 2.5rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--line);
}

h3 { font-size: 1rem; margin: 0 0 0.35rem; }

.lead { color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.grid article {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.9rem 1rem;
  background: #fff;
}

.grid p { margin: 0; color: var(--muted); }

a { color: var(--accent); }

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

footer .wrap { padding: 1.25rem; }

.sep { margin: 0 0.4rem; }