:root {
  color-scheme: light dark;
  --max: 46rem;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
  color: #1a1a1a;
  background: #fafafa;
}

a { color: #0b57d0; }

header.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  border-bottom: 1px solid #e2e2e2;
}

.brand { font-weight: 700; text-decoration: none; color: inherit; }

header.site nav a {
  text-decoration: none;
  margin-left: 1rem;
  font-size: 0.95rem;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

h1 { font-size: 1.8rem; line-height: 1.25; margin: 0 0 0.5rem; }
h2 { font-size: 1.25rem; margin: 2rem 0 0.5rem; }
h3 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }

p, ul, ol { margin: 0.75rem 0; }
li { margin: 0.3rem 0; }

.tagline { color: #666; font-size: 1.05rem; margin: 0.25rem 0 1.5rem; }

.card {
  display: block;
  padding: 1rem 1.1rem;
  margin: 0.75rem 0;
  border: 1px solid #e2e2e2;
  border-radius: 10px;
  text-decoration: none;
  color: inherit;
}
.card:hover { border-color: #bbb; }
.card h2 { margin: 0.1rem 0 0.3rem; font-size: 1.1rem; }
.card p { margin: 0.2rem 0 0; color: #555; font-size: 0.95rem; }

footer.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  color: #777;
  font-size: 0.9rem;
  border-top: 1px solid #e2e2e2;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: rgba(127, 127, 127, 0.15);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

@media (prefers-color-scheme: dark) {
  body { color: #e8e8e8; background: #1c1c1e; }
  a { color: #7db2ff; }
  header.site { border-color: #2a2a2a; }
  .tagline { color: #aaa; }
  .card { border-color: #2a2a2a; }
  .card:hover { border-color: #444; }
  .card p { color: #9a9a9a; }
  footer.site { color: #888; border-color: #2a2a2a; }
}