.digit-wrapper {
    display: inline-block;
    height: 1em;
    overflow: hidden;
    position: relative;
    width: 0.65em;
}

.digit-strip {
    position: absolute;
    top: 0;
    transition: top 1s ease-in-out;
}

.digit-strip div {
    height: 1em;
    line-height: 1em;
}