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

.inline-flexbox() {
    display: -webkit-inline-box;
    display:    -moz-inline-box;
    display: -ms-inline-flexbox;
    display: -webkit-inline-flex;
    display:         inline-flex;
}

.flex(@columns) {
    -webkit-box-flex: @columns;
       -moz-box-flex: @columns;
            box-flex: @columns;
    -webkit-flex: @columns;
       -moz-flex: @columns;
        -ms-flex: @columns;
            flex: @columns;
}

.flex-direction(@direction: row) {
    -webkit-flex-direction: @direction;
       -moz-flex-direction: @direction;
        -ms-flex-direction: @direction;
            flex-direction: @direction;

    & when (@direction = row) {
        -webkit-box-orient: horizontal;
           -moz-box-orient: horizontal;
                box-orient: horizontal;
    }
    & when (@direction = row-reverse) {
        -webkit-box-orient: horizontal;
           -moz-box-orient: horizontal;
                box-orient: horizontal;
        -webkit-box-direction: reverse;
           -moz-box-direction: reverse;
                box-direction: reverse;
    }
    & when (@direction = column) {
        -webkit-box-orient: vertical;
           -moz-box-orient: vertical;
                box-orient: vertical;
    }
    & when (@direction = column-reverse) {
        -webkit-box-orient: vertical;
           -moz-box-orient: vertical;
                box-orient: vertical;
        -webkit-box-direction: reverse;
           -moz-box-direction: reverse;
                box-direction: reverse;
    }
}

.flex-wrap(@wrap: nowrap) {
    -webkit-flex-wrap: @wrap;
       -moz-flex-wrap: @wrap;
        -ms-flex-wrap: @wrap;
            flex-wrap: @wrap;

    & when (@wrap = nowrap) {
        -webkit-box-lines: single;
           -moz-box-lines: single;
                box-lines: single;
    }
    & when (@wrap = wrap) {
        -webkit-box-lines: multiple;
           -moz-box-lines: multiple;
                box-lines: multiple;
    }
}

.justify-content(@justify: flex-start) {
  -webkit-justify-content: @justify;
     -moz-justify-content: @justify;
      -ms-justify-content: @justify;
          justify-content: @justify;

    & when (@justify = space-between) {
        -webkit-box-pack: justify;
           -moz-box-pack: justify;
           -ms-flex-pack: justify;
    }
    & when (@justify = space-around) {
        -webkit-box-pack: justify;
           -moz-box-pack: justify;
           -ms-flex-pack: distribute;
    }
}

.align-content(@align: stretch) {
    -ms-flex-line-pack: @align;
    -webkit-align-content: @align;
       -moz-align-content: @align;
        -ms-align-content: @align;
            align-content: @align;

    & when (@align = space-between) {
        -ms-flex-line-pack: justify;
    }
    & when (@align = space-around) {
        -ms-flex-line-pack: distribute;
    }
    & when (@align = start) {
        -webkit-align-content: ~'flex-@{align}';
                align-content: ~'flex-@{align}';
    }
    & when (@align = end) {
        -webkit-align-content: ~'flex-@{align}';
                align-content: ~'flex-@{align}';
    }
}

.align-items(@align: stretch) {
    -webkit-align-items: @align;
       -moz-align-items: @align;
        -ms-align-items: @align;
            align-items: @align;

    & when (@align = start) {
        -webkit-align-items: ~'flex-@{align}';
                align-items: ~'flex-@{align}';
    }
    & when (@align = end) {
        -webkit-align-items: ~'flex-@{align}';
                align-items: ~'flex-@{align}';
    }
}

.align-self(@align: stretch) {
    -ms-flex-item-align: @align;
    -webkit-align-self: @align;
            align-self: @align;

    & when (@align = start) {
        -webkit-align-self: ~"flex-@{align}";
        align-self: ~"flex-@{align}";
    }
    & when (@align = end) {
        -webkit-align-self: ~"flex-@{align}";
        align-self: ~"flex-@{align}";
    }
}

.order(@number) {
    -webkit-box-ordinal-group: @number;
       -moz-box-ordinal-group: @number;
            box-ordinal-group: @number;
    -ms-flex-order: @number;
     -webkit-order: @number;
             order: @number;
}