html {
height: 100vh;
overflow-y: hidden;
}
body {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
height: 100vh;
}
.blank-post-body {
display: -webkit-box; display: -ms-flexbox;
display: flex;
-webkit-box-flex: 1;
-ms-flex: 1 1 auto;
flex: 1 1 auto;
}
footer.page-footer {
display: none !important;
}

...