.header{text-align:center;margin-bottom:40px}.btn-submit{background-color:#5cb85c;color:white;border:none;padding:10px 20px;border-radius:4px;cursor:pointer;width:100%;display:block}.btn-submit:hover{background-color:#449d44}.column.full{width:100%}@media (max-width:768px){.column{width:100%;margin-bottom:20px}}select{background-color:#fff}