[SASS] center login form
.login-wrap {
position: fixed;
left: 0;
top: 0;
width: 100%;
height: 100%;
z-index: 1;
text-align: center;
&:after {
display: inline-block;
width: 0;
height: 100%;
vertical-align: middle;
content: '';
}
.login-form {
text-align: left;
display: inline-block;
vertical-align: middle;
}
}