.errbackgroung {
    background: #FFF;
    width: 100%;
    height: 100%;
    padding-bottom: 10%;
    float: left;
}

.errbox {
    width: 50%;
    margin: 12% auto;
    background: #8a97a9;
    font-family: Arial, Helvetica, sans-serif;
    padding: 50px 20px;
    font-size: 3.1667em;
    font-weight: 300;
    line-height: 1.25em;
    text-align: center;
    color: #f3ead6;
    -webkit-box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
    -moz-box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
    box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
    /*text-shadow: -3px -3px 6px rgb(0, 11, 25);*/
}

@media (max-width:400px) {
    .errbox {
        width: 80% !important;
        margin: 12% auto;
        background: #8a97a9;
        font-family: Arial, Helvetica, sans-serif;
        padding: 50px 20px;
        font-size: 3.1667em;
        font-weight: 300;
        line-height: 1.25em;
        text-align: center;
        color: #f3ead6;
        -webkit-box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
        -moz-box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
        box-shadow: 0px 0px 10px 2px rgba(250,250,250,1);
        /*text-shadow: -3px -3px 6px rgb(0, 11, 25);*/
    }
}