:root {
  color-scheme: light;
  font-family: Arial, Helvetica, sans-serif;
  color: #17212b;
  background: #f4f6f8;
}

* { box-sizing: border-box; }

body { margin: 0; }

main {
  width: min(920px, calc(100% - 32px));
  margin: 40px auto;
}

article {
  background: #fff;
  border: 1px solid #d9e0e6;
  border-radius: 8px;
  padding: 40px;
}

h1, h2 { line-height: 1.25; }
h1 { margin-top: 0; font-size: 32px; }
h2 { margin-top: 32px; font-size: 21px; }
p, li { font-size: 16px; line-height: 1.65; }
a { color: #1267b3; }
.updated { color: #5d6b78; }

@media (max-width: 600px) {
  main { width: 100%; margin: 0; }
  article { border: 0; border-radius: 0; padding: 24px 18px; }
  h1 { font-size: 26px; }
}