header{width:100%;height:300px;display:flex;align-items:center;justify-content:center}@media screen and (max-width: 768px){header{height:53.3333333333vw}}header h1{font-size:20px;letter-spacing:.25em;text-align:center}@media screen and (max-width: 768px){header h1{font-size:4.8vw}}