:root {
  --green: #1c806b;
  --ink: #1d2523;
  --muted: #5b6763;
  --page: #f6f8f7;
  --card: #ffffff;
  --rule: #e2e8e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --green: #4cc3a6;
    --ink: #e8eeec;
    --muted: #9aa8a3;
    --page: #111615;
    --card: #1a201e;
    --rule: #2a3230;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 48px 16px 64px;
  background: var(--page);
  color: var(--ink);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

header, main, footer {
  max-width: 680px;
  margin: 0 auto;
}

.app {
  margin: 0 0 4px;
  color: var(--green);
  font-weight: 600;
}

.app a { text-decoration: none; }

h1 {
  margin: 0 0 12px;
  font: 700 38px/1.15 ui-rounded, -apple-system, BlinkMacSystemFont, sans-serif;
}

.lede {
  margin: 0 0 8px;
  font-size: 19px;
}

.date {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

main { margin-top: 32px; }

section {
  margin: 0 0 16px;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 16px;
}

h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

p, dd { margin: 0 0 10px; }
section > :last-child { margin-bottom: 0; }

ol { margin: 0; padding-left: 22px; }
li { margin-bottom: 8px; }

dt { font-weight: 600; }
dd { margin-left: 0; color: var(--muted); }

a { color: var(--green); }

footer {
  margin-top: 32px;
  color: var(--muted);
  font-size: 15px;
  text-align: center;
}