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

.flex-1 {
    -webkit-box-flex: 1;
    -webkit-flex: 1;
    -ms-flex: 1;
    flex: 1;
}

.flex-2 {
    -webkit-box-flex: 2;
    -webkit-flex: 2;
    -ms-flex: 2;
    flex: 2;
}

.flex-3 {
    -webkit-box-flex: 3;
    -webkit-flex: 3;
    -ms-flex: 3;
    flex: 3;
}

.flex-4 {
    -webkit-box-flex: 4;
    -webkit-flex: 4;
    -ms-flex: 4;
    flex: 4;
}

.flex-wrap {
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}

.flex-row-reverse {
    -webkit-flex-direction: row-reverse;
    -ms-flex-direction: row-reverse;
    flex-direction: row-reverse;
}

.flex-column {
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
}

.align-items-start {
    -webkit-box-align: start;
    -webkit-align-items: flex-start;
    -ms-flex-align: start;
    align-items: flex-start;
}

.align-items-end {
    -webkit-box-align: end;
    -webkit-align-items: flex-end;
    -ms-flex-align: end;
    align-items: flex-end;
}

.align-items-center {
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
}

.align-items-stretch {
    -webkit-box-align: stretch;
    -webkit-align-items: stretch;
    -ms-flex-align: stretch;
    align-items: stretch;
}

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

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

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

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

.justify-content-around {
    -webkit-justify-content: space-around;
    -ms-flex-pack: distribute;
    justify-content: space-around;
}

.center {
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
}