:root {
  --ink: #1f2328;
  --muted: #5b6570;
  --line: #e3e6ea;
  --accent: #1a56c4;
  --bg: #ffffff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 20px 64px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

header, main, footer { max-width: 720px; margin: 0 auto; }

header {
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.kicker {
  margin: 0 0 10px;
  font-size: 13px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
}

.kicker a { color: var(--muted); }

h1 {
  margin: 0 0 14px;
  font-size: 30px;
  line-height: 1.25;
  font-weight: 650;
  letter-spacing: -.01em;
}

.lead { margin: 0; color: var(--muted); font-size: 17px; }

h2 {
  margin: 34px 0 10px;
  font-size: 19px;
  font-weight: 620;
  letter-spacing: -.005em;
}

p { margin: 0 0 14px; }

ul { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 7px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  background: #f4f6f8;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 13.5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}

footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.muted { color: var(--muted); }

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e6e9ee;
    --muted: #9aa4b1;
    --line: #2c313a;
    --accent: #7aa7ff;
    --bg: #14171c;
  }
  code { background: #1c2027; }
}