festa/styles/flex.css

.flex {
    display: flex;
}

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

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

.flex-grow {
    flex-grow: 1;
    flex-shrink: 0;
}

.flex-fix {
    flex-grow: 0;
    flex-shrink: 0;
}

.flex-shrink {
    flex-grow: 0;
    flex-shrink: 1;
}