countdown.css

.base-timer {
    display: block;
    margin: auto;
    width: 100px;
    height: 100px;
    margin-bottom: 120px;
}

.base-timer__svg {
    transform: scaleX(-1);
}

.base-timer__circle {
    fill: none;
    stroke: none;
}

.base-timer__path-elapsed {
    stroke-width: 7px;
    stroke: grey;
}

.base-timer__path-remaining {
    stroke-width: 7px;
    stroke-linecap: round;
    transform: rotate(90deg);
    transform-origin: center;
    transition: 1s linear all;
    fill-rule: nonzero;
    stroke: currentColor;
}

.base-timer__path-remaining.green {
    color: rgb(65, 184, 131);
}

.base-timer__path-remaining.orange {
    color: orange;
}

.base-timer__path-remaining.red {
    color: red;
}

.base-timer__label {
    position: relative;
    top: 50px;
    top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
}