:root {
  --text: #1a1a1a;
  --muted: #5c5c5c;
  --link: #0066cc;
  --bg: #fafafa;
  --card: #fff;
  --border: #e5e5e5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header-inner {
  max-width: 42rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
}

.site-logo:hover {
  text-decoration: none;
}

.site-nav {
  display: flex;
  gap: 1rem;
  font-size: 0.9rem;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
  line-height: 1.2;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.prose h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  font-weight: 650;
}

.prose p,
.prose ul {
  margin: 0 0 1rem;
}

.prose ul {
  padding-left: 1.25rem;
}

.prose li {
  margin-bottom: 0.35rem;
}

.callout {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
}

.callout h2 {
  margin-top: 0;
  font-size: 1rem;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88em;
  background: #eee;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  word-break: break-all;
}

footer {
  max-width: 42rem;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  font-size: 0.85rem;
  color: var(--muted);
}