.cntl {
    position: relative;
    width: 100%;
    overflow: hidden
}

.cntl-center {
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto
}

.cntl-bar {
    position: absolute;
    width: 10px;
    top: 0;
    bottom: 0;
    background-color: #ccc;
    box-shadow: inset 0 0 7px -2px #000
}

.cntl-bar-fill {
    background-color: #009ABB;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 0
}

.cntl-state {
    position: relative;
    width: 100%;
    min-height: 200px;
    margin-bottom: 50px
}

.cntl-state:last-child{
    margin-bottom: 0;
}

.cntl-state::after {
    display: block;
    content: ' ';
    clear: both
}

.cntl-icon {
    border-radius: 50%;
    width: 80px;
    height: 80px;
    background-color: #00313C;
    border: 3px solid #009ABB;
    box-shadow: 0 0 19px -9px #000;
    position: absolute;
    top: 0;
    text-align: center;
    line-height: 80px;
    font-size: 40px;
    color: #fff
}

.cntl-content {
    width: 40%;
    padding: 2%;
    background-color: rgba(238, 238, 238, .25);
    border-radius: 8px;
    border-bottom: solid 3px #009ABB;
    float: left;
    opacity: 0;
    position: relative;
    margin-left: -40%
}

.cntl-state:nth-child(2n+2) .cntl-content {
    float: right;
    margin-right: -40%
}

.cntl-image {
    opacity: 0;
    width: 40%;
    padding: 2%
}

.cntl-state:nth-child(2n+1) .cntl-image {
    float: right
}

.cntl-image img {
    width: 100%
}

.cntl-content h4 {
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 10px
}

.cntl-bar-fill,
.cntl-content,
.cntl-image {
    -webkit-transition: all 500ms ease;
    -moz-transition: all 500ms ease;
    -o-transition: all 500ms ease;
    -ms-transition: all 500ms ease;
    transition: all 500ms ease
}

.cntl-state:nth-child(2n+2).cntl-animate .cntl-content {
    margin-right: 0
}

.cntl-animate .cntl-content {
    opacity: 1;
    margin-left: 0
}

.cntl-animate .cntl-image {
    opacity: 1
}

@media (max-width:600px) {
    .cntl-bar {
        left: auto;
        right: 37px
    }

    .cntl-content {
        width: 80%;
        float: none
    }

    .cntl-state:nth-child(2n+2) .cntl-content {
        margi-right: 0;
        float: none
    }

    .cntl-image {
        width: 80%
    }

    .cntl-state:nth-child(2n+1) .cntl-image {
        float: none
    }

    .animate .cntl-content {
        margin-left: 2%
    }

    .cntl-icon {
        left: auto;
        right: 0
    }
}