:root {
  --white: white;
  --black: black;
  --blue: blue;
  --red: red;
  --orange: orange;
  --yellow: yellow;
  --green: green;
  --purple: purple;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: sans-serif;
  line-height: 1.5;
}

header {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--black);
}

.site-title {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: bold;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav a[aria-current="page"] {
  color: var(--black);
  font-weight: bold;
}

main {
  padding: 1.5rem;
}

main h1 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
}

main p {
  margin: 0 0 1rem;
}

a {
  color: var(--blue);
}