.form-box{position:fixed;top:2.5em;bottom:0;left:0;right:0}form{position:fixed;width:21em;top:50%;left:50%;margin-left:-10em;margin-top:-16em}form .header{text-align:center;font-size:1em!important}form p{font-size:.8em;margin-top:.3em;margin-bottom:0;font-weight:400;padding:0}form .comment{margin-top:.5em;padding:.5em;color:gray}form .register-box{text-align:center;margin-top:1em}@media screen and (max-width: 512px){form{width:80%;margin-left:-40%}}.disabled{color:#ccc!important}