:root{ --main-color: #D64B3D; }

.demo{ background: radial-gradient(#fff,#ccc); }

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

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

.main-timeline .timeline{
    width: 50%;
    padding: 0 0 0 30px;
    margin: 0 5px 15px 0;
    float: left;
    position: relative;
    z-index: 1;
}

.main-timeline .timeline-content{
    background-color: #fff;
    padding: 35px 75px 35px 40px;
    box-shadow: 0 0 15px -3px rgba(0,0,0,0.3);
    display: block;
    position: relative;
}

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

.main-timeline .timeline-content:before{
    content: '';
    height: 50%;
    width: 50px;
    background-color: var(--main-color);
    transform: translateY(-50%);
    position: absolute;
    left: -30px;
    top: 50%;
    bottom: 15px;
    right: 15px;
    z-index: -1;
    clip-path: polygon(0 0, 30% 50%, 0 100%, 100% 100%, 100% 0);
}

.main-timeline .timeline-icon{
    color: #fff;
    background: var(--main-color);
    font-size: 35px;
    text-align: center;
    line-height: 80px;
    width: 80px;
    height: 80px;
    transform: translateY(-50%);
    position: absolute;
    top: 50%;
    right: -40px;
    z-index: 1;
}

.main-timeline .title{
    color: #333;
    font-size: 22px;
    font-weight: 600;
    text-transform: uppercase;
    margin: 0 0 5px;
}

.main-timeline .description{
    color: #777;
    font-size: 13px;
    letter-spacing: 1px;
    line-height: 20px;
    margin: 0;
}

.main-timeline .timeline:nth-child(even){
    padding: 0 30px 0 0;
    margin: 0 0 15px 5px;
    float: right;
}

.main-timeline .timeline:nth-child(even) .timeline-content{ padding: 35px 40px 35px 75px; }

.main-timeline .timeline:nth-child(even) .timeline-content:before{
    transform: translateY(-50%) rotateY(180deg);
    left: auto;
    right: -30px;
}

.main-timeline .timeline:nth-child(even) .timeline-icon{
    left: -40px;
    right: auto;
}

.main-timeline .timeline:nth-child(4n+2){ --main-color: #416F7F; }

.main-timeline .timeline:nth-child(4n+3){ --main-color: #373B3C; }

.main-timeline .timeline:nth-child(4n+4){ --main-color: #89348A; }

@media screen and (max-width:767px){
    .main-timeline .timeline,
    .main-timeline .timeline:nth-child(even){
        width: calc(100%);
        padding: 0 40px 0 30px;
    }

    .main-timeline .timeline:nth-child(even){ padding: 0 30px 0 40px; }
}

@media screen and (max-width:479px){
    .main-timeline .timeline,
    .main-timeline .timeline:nth-child(even){
        width: 100%;
        padding: 40px 0 30px;
        margin: 0 0 30px;
    }

    .main-timeline .timeline-content,
    .main-timeline .timeline:nth-child(even) .timeline-content{
        text-align: center;
        padding: 70px 25px 35px;
    }

    .main-timeline .timeline-content:before,
    .main-timeline .timeline:nth-child(even) .timeline-content:before{
        transform: translateY(0) translateX(-50%) rotate(-90deg);
        left: 50%;
        right: auto;
        top: auto;
        bottom: -65px;
    }

    .main-timeline .timeline-icon, 
    .main-timeline .timeline:nth-child(even) .timeline-icon{
        transform: translateY(0) translateX(50%);
        top: -40PX;
        right: 50%;
        left: auto;
    }
}