:root {
  --bg: #fdfdfd;
  --fg: #222;
  --muted: #666;
  --link: #0b5cad;
  --rule: #ddd;
  --code-bg: #f3f3f3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161616;
    --fg: #ddd;
    --muted: #999;
    --link: #7ab7ff;
    --rule: #333;
    --code-bg: #242424;
  }
}

body {
  background: var(--bg);
  color: var(--fg);
  font: 1.125rem/1.6 Georgia, "Times New Roman", serif;
  margin: 0;
  padding: 0 1rem;
}

header, main {
  max-width: 42rem;
  margin: 0 auto;
}

header {
  padding: 1.5rem 0 0.5rem;
  border-bottom: 1px solid var(--rule);
  font-family: system-ui, sans-serif;
  font-size: 0.95rem;
}

main { padding-bottom: 4rem; }

a { color: var(--link); }
h1, h2, h3 { line-height: 1.25; }
.date { color: var(--muted); margin-top: -0.5rem; }

pre, code {
  background: var(--code-bg);
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.9em;
}
code { padding: 0.1em 0.3em; border-radius: 3px; }
pre { padding: 0.8rem 1rem; overflow-x: auto; border-radius: 4px; }
pre code { padding: 0; background: none; }

blockquote {
  margin-left: 0;
  padding-left: 1rem;
  border-left: 3px solid var(--rule);
  color: var(--muted);
}

img { max-width: 100%; height: auto; }

/* keep wide display equations from breaking the layout on phones */
math[display="block"] { overflow-x: auto; max-width: 100%; }