body * {
    padding-left: .3em;
    padding-right: .3em;
}

.column-flex {
   display: flex;
   flex-direction: column;
}

.row-flex {
   display: flex;
   flex-direction: row;
}

.flex-item-grow {
   flex: 1 0 auto;
}

.flex-item-shrink {
   flex: 0 1 auto;
}