.mt30{
    margin-top: 30px;
}
.mt50{
    margin-top: 50px;
}
.mt80{
margin-top: 80px;
}
.mb80{
    margin-bottom: 80px;
    }
.mt100{
    margin-top: 100px;
    }
.pt80{
    padding-top: 80px;
    }