ul.progress-bar-step {
    width: 100%;
    margin: 0;
    padding: 0;
    font-size: 0;
    list-style: none;
}

@keyframes changeBackground {
    from {
        background: lightgray
    }

    to {
        background: #00a65a
    }
}

ul.progress-bar-step li.section {
    display: inline-block;
    padding-top: 45px;
    font-size: 13px;
    font-weight: bold;
    line-height: 16px;
    color: gray;
    vertical-align: top;
    position: relative;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
}

    ul.progress-bar-step li.section:before {
        content: 'x';
        position: absolute;
        top: 2px;
        left: calc(50% - 15px);
        z-index: 1;
        width: 40px;
        height: 40px;
        color: white;
        border: 2px solid white;
        border-radius: 50%;
        line-height: 40px;
        background: lightgray;
    }

.status-bar {
    height: 4px;
    background: lightgray;
    position: relative;
    top: 25px;
    margin: 0 auto;
}

.current-status {
    height: 4px;
    width: 0;
    border-radius: 1px;
    background: mediumseagreen;
}

ul.progress-bar-step li.section.visited:before {
    content: '\2714';
    animation: changeBackground .5s linear;
    animation-fill-mode: forwards;
}