.progressbar {
    counter-reset: step;
}

.progressbar li {
    list-style-type: none;
    width: 25%;
    float: left;
    font-size: 12px;
    position: relative;
    text-align: center;
    text-transform: uppercase;
    color: #7d7d7d;
}

    .progressbar li:before {
        width: 30px;
        height: 30px;
        content: counter(step);
        counter-increment: step;
        line-height: 30px;
        border: 2px solid #7d7d7d;
        display: block;
        text-align: center;
        margin: 0 auto 10px auto;
        border-radius: 50%;
        background-color: white;
    }

    .progressbar li:after {
        width: 100%;
        height: 2px;
        content: '';
        position: absolute;
        background-color: #7d7d7d;
        top: 15px;
        left: -50%;
        z-index: -1;
    }

    .progressbar li:first-child:after {
        content: none;
    }

    .progressbar li.active {
        color: green;
    }

        .progressbar li.active:before {
            border-color: #55b776;
        }

        .progressbar li.active + li:after {
            background-color: #55b776;
        }