.timeCountdown {
    text-align: center;
    margin: 60px 0px 60px 0px;
}
.counterdays, .counterhours, .counterminutes, .counterseconds {
    font-size: 65px;
    line-height: 30px;
    font-weight:500;
    color: #000;
    text-align: center;
    display: inline-block;
    margin: 20px;
    min-width:100px;
}

    .counterdays span, .counterhours span, .counterminutes span, .counterseconds span {
        font-size: 12px;
    }

@media screen and (max-width: 767px) {
    .counterdays, .counterhours, .counterminutes, .counterseconds {
        font-size: 35px;
        line-height: 20px;
        margin: 10px;
        min-width: 50px;
    }
}