Customize animated countdown

Hi guys, whats up!!

I am trying to customize countdown animation without any results.
I’ve applied css styles detailed in https://kriesi.at/documentation/enfold/animated-countdown/ but could’t get any result:

/* Countdown number */
#top .av-countdown-timer.my-custom-countdown .av-countdown-time {
background: red;
}
/* Each unit */
#top .av-countdown-timer.my-custom-countdown .av-countdown-cell .av-countdown-cell-inner {
border: none;
}
/* Countdown element */
#top .av-countdown-timer.my-custom-countdown .av-countdown-timer-inner {
background: cyan;
}

Thanks!