:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #5c5c5c;
  --rule: #e3e3e3;
  --link: #0b5fd0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --fg: #e8e8e8;
    --muted: #9aa0a6;
    --rule: #2c3037;
    --link: #7fb0ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0 auto;
  padding: 3rem 1.25rem 5rem;
  max-width: 42rem;
  background: var(--bg);
  color: var(--fg);
  font: 1rem/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 .25rem; letter-spacing: -.02em; }
h2 { font-size: 1.15rem; margin: 2.5rem 0 .5rem; letter-spacing: -.01em; }
.updated { color: var(--muted); font-size: .9rem; margin: 0 0 2rem; }
a { color: var(--link); }
ul { padding-left: 1.25rem; }
li { margin: .3rem 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 3rem 0 1.5rem; }
footer { color: var(--muted); font-size: .875rem; }
code { font-size: .9em; }

.cta { margin: 2.25rem 0 0; }
.button {
  display: inline-block;
  padding: .7rem 1.4rem;
  border-radius: .5rem;
  background: var(--link);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}
.button:hover { filter: brightness(1.08); }