section header{text-align:center;font-weight:bolder}section header a{text-decoration:none}.logo{width:250px;margin:auto}.logo img{width:100%;height:auto}.signup-btn{float:right;cursor:pointer}.hackathon-start{display:grid;grid-template-columns:60% 40%}.hackathon-start a button{cursor:pointer;height:4em;width:100%}