html, body, section {display: -webkit-box; display: -moz-box; display: -ms-flexbox; display: -webkit-flex; display: flex; flex-wrap: wrap; margin-right: auto; margin-left: auto; width: 100%; height: 100vh;}
div {margin-right: auto; margin-left: auto; max-width: 686px; width: 100%; height: 100vh;padding: 60px; }
@media only screen and (max-width: 600px) {
div {margin-right: auto; margin-left: auto; max-width: 686px; width: 100%;}
}
img {width: 100%;}