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

body {
  font-family: "Arial", sans-serif;
}

footer {
  margin-top: 400px;
  background-color: #333;
  color: white;
  text-align: center;
  padding: 1em;
  bottom: 0;
  width: 100%;
}