body {
  font-family: system-ui, sans-serif;
  max-width: 900px;
  margin: 3rem auto;
  padding: 0 1rem;
}

form {
  display: grid;
  gap: .75rem;
  max-width: 420px;
  margin: 2rem 0;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}