.math-fraction {
    display: inline-flex;
    flex-direction: column;
    align-items: stretch;
    vertical-align: middle;
    text-align: center;
    line-height: 1.15;
    margin: .15em .12em;
    font-size: .95em;
    white-space: nowrap;
}
.math-fraction-numerator { padding: 0 .22em .1em; border-bottom: 1px solid currentColor; }
.math-fraction-denominator { padding: .1em .22em 0; }