.window_auth
{
    display: inline-block;
    width: 100%;
    height: 100%;
    margin-top: 0rem
    
}
.panel-footer .btn
{
    margin: 0 15px
}
.input-def
{
    color: #337ab7
}
@media (min-width:768px){
 .window_auth
 {
    width: 350px;
    height: 350px;
    margin-top: 15rem;
 }
}