timeline style : demo 166

CSS

(Fonts required: Poppins.)
                    .main-timeline{ font-family: 'Poppins', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: 50%;
                        margin: 0 0 10px 5px;
                        float: right;
                    }
                    .main-timeline .timeline-content{
                        color: #666;
                        background: linear-gradient(to right,#f1f1f1,transparent);
                        min-height: 120px;
                        padding: 15px;
                        border-radius: 20px;
                        display: block; 
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-year{
                        color: #DC8C3E;
                        font-size: 45px;
                        line-height: 45px;
                        font-weight: 600;
                    }
                    .main-timeline .title{
                        color: #fff;
                        background: linear-gradient(to right,#FC424A,#DC8C3E);
                        font-size: 20px;
                        font-weight: 600;
                        letter-spacing: 1px;
                        text-transform: uppercase;
                        padding: 5px 10px;
                        margin: 0 0 5px;
                        border-radius: 10px;
                        display: inline-block;
                    }
                    .main-timeline .description{
                        font-size: 13px;
                        letter-spacing: 1px;
                        line-height: 20px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){
                        margin: 0 5px 10px 0;
                        float: left;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content{
                        background: linear-gradient(to left,#f1f1f1,transparent);
                        text-align: right;
                    }
                    .main-timeline .timeline:nth-child(even) .description{ text-align: left; }
                    .main-timeline .timeline:nth-child(4n+2) .timeline-year{ color: #3BCD59; }
                    .main-timeline .timeline:nth-child(4n+2) .title{ background: linear-gradient(to right,#3BCD59,#8BD33B); }
                    .main-timeline .timeline:nth-child(4n+3) .timeline-year{ color: #10A5D7; }
                    .main-timeline .timeline:nth-child(4n+3) .title{ background: linear-gradient(to right,#10A5D7,#69D4D7); }
                    .main-timeline .timeline:nth-child(4n+4) .timeline-year{ color: #E31F9A; }
                    .main-timeline .timeline:nth-child(4n+4) .title{ background: linear-gradient(to right,#E31F9A,#CF21C2); }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline{ width: 100%; } 
                    }
                    @media screen and (max-width:576px){
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            background: linear-gradient(#f1f1f1,transparent);
                            text-align: center;
                        }
                        .main-timeline .timeline:nth-child(even) .description{ text-align: center; }
                    }
                    
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