#signup_container {
    position:absolute;
    height: 100%;
    width: 100%;
    background: #CCC;
    z-index: 100;
    display: hidden;
    font-family: Verdana;
}

.form{
    postion: relative;
    top: 50%;
    margin-left: auto;
    margin-right: auto;
    height: 367px;
    width: 221px;
    margin-top:20%;  
}