.mce-branding-powered-by {
    display: none;
}
#main {
    transition: margin-left .5s;
    padding: 16px;
    margin-left: 250px;
    overflow: hidden;
}
div#nav-left,div#main{
    margin-top: 70px;
}
.nav-label{
    transition: width .5s;
}