.block { display: block; }
.inline-block { display: inline-block; }
.flex {
    display: flex;
    /* Не растягивать */
    flex-grow: 0;
    flex-shrink: 0;
    flex-basis: auto;
}

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

.jc-center { justify-content: center; }
.jc-between { justify-content: space-between; }
.jc-around { justify-content: space-around; }
.jc-start { justify-content: flex-start; }
.jc-end { justify-content: flex-end; }

.ai-center { align-items: center; }
.ai-start { align-items: flex-start; }
.ai-end { align-items: flex-end; }

.ta-center { text-align: center; }
.ta-start { text-align: start; }
.ta-end { text-align: end; }