.header {
  padding: 100px;
  text-align: center;
  background: #1abc9c;
  color: maroon;
  font-size: 20px;
  top: 0px;
  left: 0;
  width: 1230px;
  height: 300px;
  position: absolute;
  z-index: -1
}

body {
  margin: 0;
}