.timeline .column-container:before {
    content: "";
    width: 2px;
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    background-color: #efefef;
}

.timeline .column-container .col-text {
    background-color: #f4f4f4;
    padding: 20px 15px;
    text-align: center;
    border-radius: 10px;
    max-width: 45%;
}

@media only screen and (max-width: 767.99px) {
    .timeline .column-container .col-text {
        max-width: 100%;
    }
}

.timeline .column-container .col-text:before {
    content: "";
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 20px 0 20px 20px;
    border-color: transparent transparent transparent #f4f4f4;
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
}

@media only screen and (max-width: 767.99px) {
    .timeline .column-container .col-text:before {
        display: none;
    }
}

.timeline .column-container:nth-of-type(odd) .col-text {
    margin-left: 55%;
}

@media only screen and (max-width: 767.99px) {
    .timeline .column-container:nth-of-type(odd) .col-text {
        margin-left: 0;
    }
}

.timeline .column-container:nth-of-type(odd) .col-text:before {
    content: "";
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 20px 20px 20px 0;
    border-color: transparent #f4f4f4 transparent transparent;
    position: absolute;
    left: -20px;
    top: 50%;
    transform: translateY(-50%);
}