.wpconvb_timer {
    width: 100%;
    padding: 30px;
    display: table;
    text-align: center;
    box-sizing: border-box;
}
.wpconvb_timer .wpcb_time {
    display: table-cell;
    vertical-align: top;
    font-size: 44px;
    box-sizing: border-box;
    line-height: 1em;
}

.wpcb_time .wpcb_time_text {
    font-size: 14px;
    width: 100%;
    float: left;
}