div#timer {
    --progress: var(--value);
    border-radius: 50px;
    display: block;
    width: 18px;
    height: 17px;
    border: 1px solid var(--cor_txt_topo);
    background: conic-gradient(from 0deg, var(--cor_txt_topo) var(--progress), transparent var(--progress));
}

.contagem-timeout {
    background-color: #fff;
    color: var(--cor_txt_topo);
    box-shadow: rgb(0 0 0 / 20%) 0px 0px 5px;
    border-radius: 8px;
    height: 31px;
    justify-content: center;
    padding: 10px;
}

@media only screen and (max-width: 767px) {
    .contagem-timeout {
        font-size: smaller;
        padding: 5px;
    }

    div#timer {
        width: 12px;
        height: 11px;
    }
}