.page .page-signup {
    box-sizing: border-box;
    padding: 10px;
    text-align: left;
}
.page .page-signup form p {
    margin: 10px 0;
}
.page .page-signup .missing {
    background-color: #ffdcdc;
    border: 1px solid #f00;
}
@media screen and (orientation: portrait){
    .page .page-signup {
        width: 100%;
    }
}