* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  align-items: center;
  display: flex;
  flex-direction: column;
  font-family: sans-serif;
  justify-content: center;
  line-height: 1.6;
}

header,
nav {
  display: flex;
  gap: 20px;
  justify-content: center;
  padding: 1rem;
}

main {
  align-items: center;
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  padding: 2rem;
  text-align: center;
}

form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 300px;
}

footer {
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: center;
  padding: 1rem;
}

a,
button {
  padding: 5px 10px;
}