:root {
  color-scheme: light dark;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --bg: #ffffff;
  --link: #0066cc;
  --code-bg: #f2f2f4;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --bg: #161617;
    --link: #4aa3ff;
    --code-bg: #2a2a2c;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

h1 { font-size: 2.2em; line-height: 1.15; margin: 0 0 0.4em; letter-spacing: -0.01em; }
h2 { font-size: 1.2em; margin: 2em 0 0.5em; }
.lede { font-size: 1.2em; color: var(--muted); }
.meta { color: var(--muted); margin-top: -0.6em; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 5px; font-size: 0.88em; }
ul { padding-left: 1.2em; }
li { margin: 0.4em 0; }