.d-flex {
    display: flex;
}
.flex-column{
    flex-direction: column;
}
.justify-content-between{
    justify-content: space-between;
}
.align-items-center{
    align-items: center;
}
.ml-2{
    margin-left: 20px;
}
.ml-1{
    margin-left: 10px;
}
.mr-2{
    margin-right: 20px;
}
.mb-1{
    margin-bottom: 10px;
}
.mb-2{
    margin-bottom: 20px;
}