* {
  box-sizing: border-box;
}

body {
  font-family: sans-serif;
  margin: auto;
  min-height: 100vh;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #ECF7F6;
  gap: .75rem;
}

main {
  background: white;
  border-radius: 0.125rem;
  padding: 1.5rem;
  width: 30rem;
  max-width: 100%;
}

header {
  text-align: center;
}

nav {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  align-items: stretch;
}

a {
  color: #017789;
}

footer {
  color: #253847;
  font-size: 85%;
}