body{
    line-height: 1.2;
}
#mess{
    width: 400px;
    margin: 0px auto;
    color: black;
}
#sign{
    width: 250px;
    margin: 0px auto;
    background-color: whitesmoke;
    margin-top: 100px;
    padding: 20px;
    border-radius: 5px;
    border-bottom: 1px solid #d3d9de;
}
.btna{
    display: inline;
    margin-top: 15px;
    margin-left: 75px;
}