:root {
  font-family: system-ui, sans-serif;
  color: #182b30;
  background: #f4f7f3;
}
body {
  margin: 0;
}
header,
main {
  max-width: 40rem;
  margin: auto;
  padding: 1.5rem;
}
.brand {
  font-weight: 750;
  font-size: 1.2rem;
}
h1 {
  font-size: 1.6rem;
  line-height: 1.25;
}
p {
  line-height: 1.5;
}