BODY {font-family: arial;}

.mainFrame {width: 100%; height: 100vh; display: flex; justify-content: space-around; align-items: center;}
.mainFrame .center {width: 500px; float: left; text-align: center;}
.mainFrame .center .button {padding: 12px 30px; margin: 30px 0px 100px 0px; display: block; background-color: #8bc6d6; color: #FFF; text-decoration: none; font-size: 20px; border-radius: 3px;}