.montage-TreeList {
    box-sizing: border-box;
    position: relative;
    display: -ms-flexbox;
    display: flex;
    z-index: 1;
    height: 100%;
    /* TODO: in IE 11, this z-index causes the action menu not to work
       in Social, Identify, and Area Brief panels. Had to add z-idex to those
       panels to make it work in IE 11.
    */
}

.montage-TreeList-wrapper {
    overflow: auto;
    -webkit-overflow-scrolling: touch;
    position: relative;
    display: -ms-flexbox;
    display: flex;
   -ms-flex: 1;
    flex: 1;
}

.montage-TreeList-repetition {
    -ms-flex: 1;
    flex: 1;
}

.montage-TreeList-nodeWrapper {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    overflow: hidden;
    box-sizing: border-box;
}

.montage-TreeList-nodeWrapper.willDrop::before {
    box-sizing: border-box;
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: currentColor;
    opacity: 0.5;
}

.montage-TreeList-nodeWrapper.willDrop::after {
    box-sizing: border-box;
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: transparent;
    border: 2px solid currentColor; 
}

.montage-TreeList-placeholder,
.montage-TreeList-ghostImage {
    box-sizing: border-box;
    position: absolute;
    top: 0;
    left: 0;
    visibility: visible;
    pointer-events: none;
    opacity: 0;
}

.montage-TreeList-placeholder {
    border-radius: 2px;
    z-index: 2;
}

.montage-TreeList.over .montage-TreeList-placeholder {
    border: 2px solid;
}

.montage-TreeList-ghostImage {
    z-index: 999999;
    margin: 0px !important;
}