:root {
  color-scheme: light;
  font-family: system-ui, sans-serif;
  color: #142929;
  background: #f4f8f6;
}

body {
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  max-width: 45rem;
}

header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid #becfca;
  color: #455e58;
}

.brand {
  font-weight: 750;
}

main {
  padding-top: 2.25rem;
  line-height: 1.6;
}

h1, h2 {
  line-height: 1.2;
}

h1 {
  margin-top: 0;
  font-size: clamp(2rem, 7vw, 3rem);
}

h2 {
  margin-top: 1.75rem;
  font-size: 1.3rem;
}

.intro {
  font-size: 1.2rem;
}

li + li {
  margin-top: .5rem;
}

a {
  color: #075c50;
  text-underline-offset: .15em;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1.5rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #becfca;
}