:root{ --main-color: #16a085; }

.main-timeline{ font-family: 'Poppins', sans-serif; }

.main-timeline:after{
    content: '';
    display: block;
    clear: both;
}

.main-timeline .timeline{
    width: 50%;
    margin: 0 5px 0 0;
    float: left;
}

.main-timeline .timeline-content{
    background-color: #fffbef;
    padding: 20px 120px 20px 20px;
    border-radius: 20px 0;
    box-shadow: 0 0 15px rgba(0,0,0,0.15);
    outline: 1px solid rgba(0,0,0,0.1);
    outline-offset: 10px;
    display: block;
    overflow: hidden;
    position: relative;
}

.main-timeline .timeline-content:hover{ text-decoration: none; }

.main-timeline .timeline-content:before{
    content: '';
    background-color: var(--main-color);
    height: 100%;
    width: 100px;
    opacity: 0.3;
    position: absolute;
    right: 0;
    top: 0;
}

.main-timeline .timeline-icon{
    color: var(--main-color);
    font-size: 50px;
    text-align: center;
    width: 100px;
    transform: translateY(-50%);
    position: absolute;
    right: 0;
    top: 50%;
}

.main-timeline .title{
    color: var(--main-color);
    font-size: 22px;
    font-weight: 300;
    text-transform: capitalize;
    margin: 0 0 7px;
}

.main-timeline .description{
    color: #888;
    font-size: 14px;
    font-weight: 300;
    line-height: 22px;
    letter-spacing: 1px;
    margin: 0;
}

.main-timeline .timeline:nth-child(even){
    margin: 0 0 15px 5px;
    float: right;
}

.main-timeline .timeline:nth-child(even) .timeline-content{ padding: 20px 20px 20px 120px; }

.main-timeline .timeline:nth-child(even) .timeline-content:before{
    right: auto;
    left: 0;
}

.main-timeline .timeline:nth-child(even) .timeline-icon{
    right: auto;
    left: 0;
}

.main-timeline .timeline:nth-child(4n+2){ --main-color: #8e44ad; }

.main-timeline .timeline:nth-child(4n+3){ --main-color: #2980b9; }

.main-timeline .timeline:nth-child(4n+4){ --main-color: #c0392b; }

@media screen and (max-width:767px){
    .main-timeline .timeline,
    .main-timeline .timeline:nth-child(even){
        width: 100%;
        margin: 0 0 31px;
    }
}

@media screen and (max-width:479px){
    .main-timeline .timeline-content,
    .main-timeline .timeline:nth-child(even) .timeline-content{
        text-align: center;
        padding: 120px 20px 20px;
    }

    .main-timeline .timeline-content:before,
    .main-timeline .timeline:nth-child(even) .timeline-content:before{
        height: 100px;
        width: 100%;
        transform: translateY(0) translateX(-50%);
        left: 50%;
        right: auto;
        top: 0;
    }

    .main-timeline .timeline-icon,
    .main-timeline .timeline:nth-child(even) .timeline-icon{
        line-height: 100px;
        height: 100px;
        width: auto;
        transform: translateY(0) translateX(-50%);
        left: 50%;
        right: auto;
        top: 0;
    }
}