.flex {
    display: flex;
    display: -webkit-box;
}

.flex-start {
    display: flex;
    display: -webkit-box;
    justify-content: start;
    -webkit-box-pack: start;
}

.flex-center {
    display: flex;
    display: -webkit-box;
    justify-content: center;
    -webkit-box-pack: center;
}

.flex-end {
    display: flex;
    display: -webkit-box;
    justify-content: end;
    -webkit-box-pack: end;
}

.flex-space-between {
    display: flex;
    display: -webkit-box;
    justify-content: space-between;
    -webkit-box-pack: justify;
}