:root {
  --paper: #fbfbf9;
  --ink: #1c1d1f;
  --muted: #6b6e73;
  --rule: #d8d6d1;
  --accent: #3a5a6b;
  --code-bg: #eeece7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 3rem 1.5rem 4rem;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 36rem;
  margin: 0 auto;
}

.tag {
  margin: 0 0 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
  font-size: 0.875rem;
  color: var(--muted);
  border-bottom-width: 3px;
  border-bottom-style: solid;
  padding-bottom: 0.25rem;
}

h1 {
  margin: 0 0 1rem;
  font-size: 1.875rem;
  font-weight: 500;
  letter-spacing: -0.015em;
}

h2 {
  margin: 2.5rem 0 1rem;
  font-size: 1.125rem;
  font-weight: 500;
}

.lead {
  color: var(--muted);
  margin: 0 0 1rem;
}

dl { margin: 0; }

dt {
  margin-top: 1.25rem;
  font-weight: 500;
}

dd {
  margin: 0.25rem 0 0;
  color: var(--muted);
}

code {
  padding: 0.1em 0.35em;
  background: var(--code-bg);
  border-radius: 3px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.875em;
  color: var(--ink);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

footer {
  margin-top: 3rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
  color: var(--muted);
}

@media (min-width: 40rem) {
  h1 { font-size: 2.25rem; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #131416;
    --ink: #f0efec;
    --muted: #9a9da3;
    --rule: #2c2e31;
    --accent: #6d97ab;
    --code-bg: #222427;
  }
}