.d-flex{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80vh;
}
.d-flex2{
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 90px;
}
.d-flex3{
    display: flex;
    align-items: flex-end;
    justify-content: center;
    height: 680px;
}