:root {
  font-family: system-ui, sans-serif;
  color: #163f32;
  background: #f4f8f5;
}
main {
  max-width: 40rem;
  margin: 10vh auto;
  padding: 2rem;
}
a {
  color: #146447;
}
a:focus-visible {
  outline: 3px solid #163f32;
  outline-offset: 5px;
}
p {
  line-height: 1.6;
}