body{width:100vw;height:100vh;display:table-cell;vertical-align:middle;background-image:url(../img/login_bg2.jpg);background-repeat:no-repeat;background-size:cover}#login-frame{width:630px;margin:auto;background:#fff;border:1px solid #dddada;padding:70px}@media (max-width:640px){#login-frame{width:100%;padding:20px}}