:root {
  --bg: #fbfaf7;
  --fg: #1d1f23;
  --muted: #5b616b;
  --accent: #002395;
  --code-bg: #efece6;
  --border: #d9d4ca;
  --max: 760px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171a;
    --fg: #e8e6e1;
    --muted: #9ba1ab;
    --accent: #7d9cff;
    --code-bg: #20232a;
    --border: #2f333b;
  }
}

:root[data-theme="dark"] {
  --bg: #15171a;
  --fg: #e8e6e1;
  --muted: #9ba1ab;
  --accent: #7d9cff;
  --code-bg: #20232a;
  --border: #2f333b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

main, .site-footer, .site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 16px;
}

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

.site-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--fg);
  text-decoration: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.brand span { color: var(--accent); }

.brand-mark {
  display: inline-block;
  vertical-align: -5px;
  margin-right: 6px;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-header nav a { text-decoration: none; }

section { margin: 48px 0; }

h1 { font-size: 2rem; line-height: 1.2; margin: 48px 0 16px; }
h2 { font-size: 1.4rem; margin: 0 0 12px; }
h3 { margin: 0 0 8px; }

.lede { color: var(--muted); font-size: 1.1rem; }

pre, code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.95em;
}

pre.command {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  white-space: pre;
}

code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 4px;
}

pre code { background: none; padding: 0; }

.fine { color: var(--muted); font-size: 0.9rem; }

.tiers {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .tiers { grid-template-columns: 1fr 1fr; }
}

.tiers article {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
}

.tag {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 6px;
  vertical-align: middle;
}

.button {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
}

.prose-page h1 { margin-top: 32px; }
.prose-page h2 { margin-top: 32px; }

.site-footer {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  padding-bottom: 32px;
  color: var(--muted);
  font-size: 0.9rem;
}