:root {
  font-family: system-ui, sans-serif;
  color: #202923;
  background: #f3f4ef;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
header,
main,
footer {
  max-width: 900px;
  margin: auto;
  padding: 24px;
}
header {
  border-bottom: 1px solid #d7ddd4;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
a {
  color: #436421;
  text-underline-offset: 4px;
}
header a {
  color: #202923;
  text-decoration: none;
}
header strong {
  font-size: 26px;
}
main {
  padding-top: 48px;
  min-height: 70vh;
}
h1 {
  font-size: 42px;
  font-weight: 500;
  letter-spacing: -1px;
}
h2 {
  font-size: 24px;
  margin-top: 36px;
}
p,
li {
  font-size: 18px;
  line-height: 1.7;
}
pre {
  overflow: auto;
  background: #e8eee0;
  border: 1px solid #d7ddd4;
  border-radius: 4px;
  padding: 20px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 13px;
  line-height: 1.7;
}
code {
  font-size: 0.85em;
}
footer {
  border-top: 1px solid #d7ddd4;
  font-size: 13px;
  color: #647067;
}
nav {
  display: flex;
  gap: 22px;
}
@media (max-width: 500px) {
  header,
  main,
  footer {
    padding: 20px;
  }
  h1 {
    font-size: 34px;
  }
  nav {
    gap: 12px;
    font-size: 13px;
  }
}