/* This targets the specific container ID and all sub-elements */
div[id^="hurrytimer-"] *, 
.hurrytimer-campaign *, 
.hurrytimer-timer * {
    font-family: inherit !important;
}

/* Specifically targets the numbers and labels to be sure */
span.hurrytimer-timer-digit, 
span.hurrytimer-timer-label {
    font-family: inherit !important;
}