:root {
  --bg: #ffffff;
  --ink: #1c1c1e;
  --muted: #6c6c70;
  --link: #0f7a5f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --ink: #f2f2f7;
    --muted: #a1a1a6;
    --link: #4cc7a4;
  }
}

* { box-sizing: border-box; }

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

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

h1 { font-size: 32px; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
p { margin: 0 0 12px; }
ul { margin: 0 0 12px; padding-left: 20px; }
li { margin-bottom: 8px; }
a { color: var(--link); overflow-wrap: anywhere; }
.muted { color: var(--muted); }
.brand { font-weight: 600; margin-bottom: 24px; }
.brand a { text-decoration: none; }