@import url(https://fonts.googleapis.com/css?family=Open+Sans);
html{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 98vh;
    background-color: #FAFAFA;
}
body{
    font-family: Open Sans, Arial, serif;
    font-size:.9rem;
    margin:2em auto;
    max-width:800px;
    padding:1em;
    line-height:1.4;
    color: #454545;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-middle{
    display: block;
    vertical-align: middle;
}