:root {
  --bg: #111418;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --link: #8ab4f8;
  --border: #3c4043;
  --code-bg: #1e2227;
  --surface: #1a1e23;
  --max: 48rem;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #fafafa;
    --text: #202124;
    --muted: #5f6368;
    --link: #1a73e8;
    --border: #dadce0;
    --code-bg: #f1f3f4;
    --surface: #fff;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Liberation Serif", serif;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3.5rem;
}

h1, h2, h3, h4 {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.3;
  font-weight: 650;
}

h1 { font-size: 1.75rem; margin: 0 0 1rem; }
h2 { font-size: 1.4rem; margin: 2.25rem 0 0.75rem; padding-top: 0.75rem; border-top: 1px solid var(--border); }
h3 { font-size: 1.15rem; margin: 1.5rem 0 0.5rem; }
h4 { font-size: 1.05rem; margin: 1.25rem 0 0.4rem; }

p, ul, ol { margin: 0.7rem 0; }
ul, ol { padding-left: 1.35rem; }
li { margin: 0.25rem 0; }

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

blockquote {
  margin: 1rem 0;
  padding: 0.5rem 0.9rem;
  border-left: 3px solid var(--border);
  color: var(--muted);
}

code {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

pre {
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  font-size: 0.88rem;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  margin: 1rem 0;
  display: block;
  overflow-x: auto;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.6rem;
  text-align: left;
  vertical-align: top;
}

th { background: var(--surface); }

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1rem 0;
  border: 1px solid var(--border);
}

video {
  display: block;
  width: 100%;
  max-width: 100%;
  margin: 1rem 0;
  background: #000;
}

@media (max-width: 640px) {
  body { font-size: 1rem; }
  main { padding: 1rem 0.85rem 2.5rem; }
}