* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
}

/* Style the header */
.header {
  position: relative;
  text-align: center;
  color: white;
  padding: 0;
}

/* Footer */
.footer {
  padding: 20px;
  text-align: center;
  background: #ddd;
}