.top-container {background-color: #f1f1f1;padding: 30px;text-align: center;}
.header {padding: 10px 16px;background: #555;color: #f1f1f1;}
.content {padding: 16px;}
.sticky {position: fixed;top: 0;width: 100%;}
.sticky + .content {padding-top: 102px;}