Easily discern nesting on Atom's tree-view

tree-view-border.less

.tree-view {
    overflow-y: auto;
    padding-right: 0;
    .selected {
        &::before {
            background: none !important;
        }
        & > * {
                text-shadow: -8px 0px 27px hsla(48, 48%, 94%, 0.6), 
                        10px 0px 27px hsl(48, 75%, 94%), 
                        10px 0px 27px hsl(48, 75%, 94%), 
                        47px 0px 19px hsla(48, 75%, 94%, 0.3);
        }
    }
    li {
        clear: both;
        padding: 0px 10px !important;
        float: left;
        overflow-x: visible;
        border: none;
        &.expanded {
            position: relative;
            margin: 5px -70px 5px 0;
            border: 2px groove hsla(260, 30%, 23%, 0.9);
            width: 100%;
            border-right: none;
            &::after {
                display: block;
                width: 100%;
                height: 100%;
            }
        }
    }
    .list-tree {
        padding-left: 5px;
    }
}