/* System fonts only: no font files, so no cache-busting problem and nothing
   fetched from a third party. The CSP forbids external anything in any case. */
:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --rule: #e2e2e2;
  --bg: #fdfdfc;
  --accent: #2a5d8f;
  --measure: 34rem;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8e8e6; --muted: #a0a09c; --rule: #333; --bg: #16161a; --accent: #7fb0e0; }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
header, main, footer { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }
header { display: flex; flex-wrap: wrap; gap: 1rem; align-items: baseline;
         justify-content: space-between; padding-top: 2rem; padding-bottom: 1rem; }
.wordmark { font-weight: 600; font-size: 1.1rem; text-decoration: none; color: var(--ink); }
nav { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.9rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a:focus { color: var(--accent); text-decoration: underline; }
main { padding-bottom: 3rem; }
h1 { font-size: 1.75rem; line-height: 1.25; margin: 1.5rem 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; margin: 2.25rem 0 0.75rem; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 0.5rem; }
a { color: var(--accent); }
code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.875em;
}
code { background: rgba(127,127,127,0.12); padding: 0.1em 0.35em; border-radius: 3px; }
pre { background: rgba(127,127,127,0.10); padding: 0.9rem 1rem; border-radius: 5px;
      overflow-x: auto; }
pre code { background: none; padding: 0; }
blockquote { margin: 1.25rem 0; padding: 0.25rem 0 0.25rem 1rem;
             border-left: 3px solid var(--rule); color: var(--muted); }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto;
        margin: 1.25rem 0; font-size: 0.92rem; }
th, td { border: 1px solid var(--rule); padding: 0.45rem 0.6rem; text-align: left;
         vertical-align: top; }
th { background: rgba(127,127,127,0.08); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }
footer { border-top: 1px solid var(--rule); padding-top: 1.25rem; padding-bottom: 3rem;
         color: var(--muted); font-size: 0.875rem; }
footer p { margin: 0.35rem 0; }