:root {
  --paper: #ffffff;
  --ink: #121513;
  --soft: #4f5651;
  --line: #e3e6e3;
  --green: #0b7f5f;
  --mint: #ddf3ea;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1512;
    --ink: #eef2ef;
    --soft: #a7b0aa;
    --line: #26302b;
    --green: #5fd3ad;
    --mint: #153229;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 20px 80px; }
.brand { margin: 0 0 32px; font-weight: 700; }
.brand a { color: var(--green); text-decoration: none; }
h1 { margin: 0 0 12px; font-size: 40px; line-height: 1.1; letter-spacing: -0.5px; }
h2 { margin: 40px 0 8px; font-size: 21px; line-height: 1.3; }
p, ul { margin: 0 0 14px; }
ul { padding-left: 22px; }
li { margin-bottom: 8px; }
a { color: var(--green); }
.lead { padding: 16px 18px; border-radius: 16px; background: var(--mint); font-size: 19px; }
.meta { color: var(--soft); font-size: 15px; }