timeline style : demo 194

CSS

(Fonts required: Poppins.)
                    :root{
                        --color1: #117D83;
                        --color2: #076769;
                    }
                    .main-timeline{ font-family: 'Poppins', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: 50%;
                        padding: 0 70px 0 0;
                        margin: 0 5px 15px 0;
                        float: left;
                    }
                    .main-timeline .timeline-content{
                        color: #999;
                        background: var(--main-color);
                        min-height: 120px;
                        padding: 0 30px 0 0;
                        border-right: 2px solid var(--color1);
                        display: block;
                        position: relative;
                        z-index: 1;
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-content:before,
                    .main-timeline .timeline-content:after{
                        content: '';
                        background-color: var(--color2);
                        height: 8px;
                        width: 8px;
                        border-radius: 50%;
                        position: absolute;
                        right: -5px;
                        top: 0;
                    }
                    .main-timeline .timeline-content:after{
                        top: auto;
                        bottom: 0;
                    }
                    .main-timeline .timeline-icon{
                        color: #fff;
                        background-color: var(--color1);
                        font-size: 40px;
                        text-align: center;
                        line-height: 93px;
                        height: 93px;
                        width: 93px;
                        border-radius: 30px;
                        box-shadow: -5px -5px 5px rgba(0,0,0,0.2), -8px -8px 0 var(--color2);
                        transform: translateY(-50%);
                        position: absolute;
                        right: -120px;
                        top: 50%;
                    }
                    .main-timeline .timeline-year{
                        font-size: 32px;
                        font-weight: 300;
                    }
                    .main-timeline .title{
                        color: var(--color1);
                        font-size: 20px;
                        font-weight: 600;
                        letter-spacing: 1px;
                        text-transform: uppercase;
                        margin: 0 0 7px;
                    }
                    .main-timeline .description{
                        color: #444;
                        font-size: 13px;
                        font-weight: 500;
                        line-height: 21px;
                        letter-spacing: 0.5px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){
                        padding: 0 0 0 70px;
                        margin: 0 0 15px 5px;
                        float: right;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content{
                        padding: 0 0 0 30px;
                        border-left: 2px solid var(--color1);
                        border-right: none;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content:before,
                    .main-timeline .timeline:nth-child(even) .timeline-content:after{
                        right: auto;
                        left: -5px;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-icon{
                        box-shadow: 5px -5px 5px rgba(0,0,0,0.2), 8px -8px 0 var(--color2);
                        left: -120px;
                        right: auto;
                    }
                    .main-timeline .timeline:nth-child(2){
                        --color1: #D31C4C;
                        --color2: #B11042;
                    }
                    .main-timeline .timeline:nth-child(3){
                        --color1: #EC431C;
                        --color2: #C83011;
                    }
                    .main-timeline .timeline:nth-child(4){
                        --color1: #2486D9;
                        --color2: #1D6CAE;
                    }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline,
                        .main-timeline .timeline:nth-child(even){
                            width: 100%;
                            padding: 115px 0 0;
                            margin: 0 0 50px;
                        }
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            text-align: center;
                            padding: 15px 0 0 0;
                            border: none;
                            border-top: 2px solid var(--color1);
                        }
                        .main-timeline .timeline-content:before{
                            right: auto;
                            left: 0;
                            top: -5px;
                        }
                        .main-timeline .timeline-content:after,
                        .main-timeline .timeline:nth-child(even) .timeline-content:after{
                            left: auto;
                            right: 0;
                            top: -5px;
                        }
                        .main-timeline .timeline-icon,
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            transform: translateY(0) translateX(-50%);
                            top: -115px;
                            left: 50%;
                        }
                    }
                    
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