.flex {
    /*display: -moz-flex;
    display: -webkit-flex;
    display: -ms-flex;*/
    display: flex;
}

.flex_wrap {
    flex-wrap: wrap;
}

.flex_column {
    flex-direction: column;
}

.space_between {
    justify-content: space-between;
}

.max_image {
    max-width: 100%;
    height: auto;
}