/*Now the CSS*/
* {
    /*margin: 0;
    padding: 0;*/
}
.atreeabc {
    position: absolute;
    width:1200px;
    /*top: 10%;*/
    left: 25%;

}
.atreeabc ul {
    padding-top: 20px;
    position: relative;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.atreeabc li {
    float: left;
    text-align: center;
    list-style-type: none;
    position: relative;
    padding: 20px 5px 0 5px;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

    /*We will use ::before and ::after to draw the connectors*/

    .atreeabc li::before, .atreeabc li::after {
        content: '';
        position: absolute;
        top: 0;
        right: 50%;
        border-top: 1px solid #ccc;
        width: 50%;
        height: 20px;
    }

    .atreeabc li::after {
        right: auto;
        left: 50%;
        border-left: 1px solid #ccc;
    }

    /*We need to remove left-right connectors from elements without 
any siblings*/
    .atreeabc li:only-child::after, .atreeabc li:only-child::before {
        display: none;
    }

    /*Remove space from the top of single children*/
    .atreeabc li:only-child {
        padding-top: 0;
    }

    /*Remove left connector from first child and 
right connector from last child*/
    .atreeabc li:first-child::before, .atreeabc li:last-child::after {
        border: 0 none;
    }
    /*Adding back the vertical connector to the last nodes*/
    .atreeabc li:last-child::before {
        border-right: 1px solid #ccc;
        border-radius: 0 5px 0 0;
        -webkit-border-radius: 0 5px 0 0;
        -moz-border-radius: 0 5px 0 0;
    }

    .atreeabc li:first-child::after {
        border-radius: 5px 0 0 0;
        -webkit-border-radius: 5px 0 0 0;
        -moz-border-radius: 5px 0 0 0;
    }

/*Time to add downward connectors from parents*/
.atreeabc ul ul::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    border-left: 1px solid #ccc;
    width: 0;
    height: 20px;
}

.atreeabc li a {
    border: 1px solid #ccc;
    padding: 5px 10px;
    text-decoration: none;
    color: #808080;
    font-family: arial, verdana, tahoma;
    font-size: 14px;
    display: inline-block;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;
    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

    /*Time for some hover effects*/
    /*We will apply the hover effect the the lineage of the element also*/
    .atreeabc li a:hover, .atreeabc li a:hover + ul li a {
        background: #c8e4f8;
        color: #000;
        border: 1px solid #94a0b4;
    }
        /*Connector styles on hover*/
        .atreeabc li a:hover + ul li::after,
        .atreeabc li a:hover + ul li::before,
        .atreeabc li a:hover + ul::before,
        .atreeabc li a:hover + ul ul::before {
            border-color: #94a0b4;
        }

/*Thats all. I hope you enjoyed it.
Thanks :)*/