html,body {
  margin: 0;
  padding: 0;
  display: flex;
  height: 100vh;
  width: 100vw;
  background-color: #EEF3F3;
}
body {
    background-image: url('img/port.jpg');
    background-repeat: no-repeat;
    background-position: center center;
    background-size: contain;
}