.control-treeview {
    margin-bottom: 40px;

    ol {
        margin: 0;
        padding: 0;
        list-style: none;
        background: @color-treeview-item-bg;

        > li {
            .transition(width 1s);

            > div {
                font-size: 13px;
                font-weight: 600;
                background: @color-treeview-item-bg;
                border-bottom: 1px solid @color-panel-light;
                position: relative;

                > a {
                    color: @color-treeview-item-title;
                    padding: 16px 45px 15px 61px;
                    display: block;
                    text-decoration: none;
                    .box-sizing(border-box);
                }

                &:before {
                    content: ' ';
                    background-image: url(../images/treeview-icons.png);
                    background-position: 0px -28px;
                    background-repeat: no-repeat;
                    background-size: 42px auto;

                    position: absolute;
                    width: 21px;
                    height: 22px;
                    left: 28px;
                    top: 20px;
                }

                span.comment {
                    display: block;
                    font-weight: 400;
                    color: @color-treeview-item-comment;
                    font-size: 12px;
                    margin-top: 2px;
                    overflow: hidden;
                    text-overflow: ellipsis;
                }

                > span.expand {
                    .hide-text();
                    display: none;
                    position: absolute;
                    left: 0;
                    width: 20px;
                    height: 20px;
                    top: 24px;
                    left: 2px;
                    cursor: pointer;
                    color: @color-treeview-control;
                    .transition(transform 0.1s ease);

                    &:before {
                        .icon(@caret-right);
                        line-height: 100%;
                        font-size: 15px;

                        position: relative;
                        left: 8px;
                        top: 2px;
                    }
                }

                > span.drag-handle {
                    .hide-text();
                    .transition(opacity 0.4s);

                    position: absolute;
                    right: 24px;
                    bottom: 5px;
                    width: 14px;
                    height: 14px;
                    cursor: move;
                    color: @color-treeview-control;
                    .opacity(0);

                    &:before {
                        .icon(@bars);
                        font-size: 14px;
                    }
                }

                span.borders {
                    font-size: 0;
                }

                > ul.submenu {
                    position: absolute;
                    left: 20px;
                    bottom: -37px;
                    padding: 0;
                    list-style: none;
                    z-index: 200;
                    height: 37px;
                    display: none;
                    margin-left: 15px;

                    background: transparent url(../images/treeview-submenu-tabs.png) repeat-x left -39px;

                    &:before, &:after {
                        background: transparent url(../images/treeview-submenu-tabs.png) no-repeat left top;
                        content: ' ';
                        display: block;
                        width: 20px;
                        height: 37px;
                        position: absolute;
                        top: 0;
                    }

                    &:before {
                        left: -20px;
                    }

                    &:after {
                        background-position: -100px top;
                        right: -20px;
                    }

                    li {
                        font-size: 12px;

                        a {
                            display: block;
                            padding: 4px 3px 0 3px;
                            color: @color-treeview-submenu-text;
                            text-decoration: none;
                            outline: none;

                            i {
                                margin-right: 5px;
                            }
                        }
                    }
                }

                &:hover {
                    > ul.submenu {
                        display: block;
                    }
                }

                .checkbox {
                    position: absolute;
                    top: 19px;
                    right: 17px;

                    label {
                        margin-right: 0;

                        &:before {
                            border-color: @color-filelist-cb-border;
                        }
                    }
                }
            }

            &.dragged div, > div:hover {
                background-color: @color-treeview-hover-bg!important;

                > a {
                    color: @color-treeview-hover-text!important;
                }

                &:before {
                    background-position: 0px -80px;
                }

                &:after {
                    top: 0!important;
                    bottom: 0!important;
                }

                span {
                    color: @color-treeview-hover-text!important;

                    &.drag-handle {
                        cursor: move;
                        .opacity(1);
                    }

                    &.borders {
                        display: none;
                    }
                }
            }

            &[data-no-drag-mode] div:hover {
                span.drag-handle {
                    cursor: default!important;
                    .opacity(0.3)!important;
                }
            }

            &.dragged {
                li.has-subitems, &.has-subitems {
                    > div:before {
                        background-position: 0px -52px;
                    }
                }

                div > ul.submenu {
                    display: none!important;
                }
            }

            > ol {
                padding-left: 20px;
            }

            &[data-status=collapsed] > ol {
                display: none;
            }

            &.has-subitems {
                >div {
                    &:before {
                        background-position: 0 0;
                        width: 23px;
                        height: 26px;
                        left: 26px;
                    }

                    &:hover:before {
                        background-position: 0px -52px;
                    }

                    span.expand {
                        display: block;
                    }
                }
            }

            &.placeholder {
                height: 0;
                position: relative;
                border-bottom: 1px dotted #c03f31;

                &:before {
                    .icon(@caret-right);
                    font-size: 23px;
                    color: white;
                    position: absolute;
                    left: -11px;
                    top: -17px;
                    z-index: 1900;
                }

                &:after {
                    .icon(@caret-right);
                    font-size: 21px;
                    color: #c03f31;
                    position: absolute;
                    left: -10px;
                    top: -14px;
                    z-index: 1901;
                }
            }

            &.dragged {
                position: absolute;
                z-index: 2000;
                // width: auto!important;
                // height: auto!important;
                .opacity(0.5);

                > div {
                    .border-radius(3px);
                }
            }

            &.drop-target  {
                > div {
                    background-color: #2581b8!important;

                    > a {
                        color: @color-treeview-hover-text;
                        > span.comment {
                            color: @color-treeview-hover-text;
                        }
                    }

                    &:before {
                        background-position: 0px -80px;
                    }
                }

                &.has-subitems > div:before {
                    background-position: 0px -52px;
                }
            }

            &[data-status=expanded] > div > span.expand {
                .transform( ~'rotate(90deg) translate(0, 0)' );
            }

            &.drag-ghost {
                background-color: transparent;
                box-sizing: content-box;
            }

            &.active {
                > div {
                    background: @color-list-active;

                    &:after {
                        position: absolute;
                        width: 4px;
                        left: 0;
                        top: -1px;
                        bottom: -1px;
                        background: @color-list-active-border;
                        display: block;
                        content: ' ';
                    }

                    > span.comment, > span.expand {
                        color: @color-treeview-item-active-comment;
                    }

                    > span.borders {
                        &:before, &:after {
                            content: ' ';
                            position: absolute;
                            width: 100%;
                            height: 1px;
                            display: block;
                            left: 0;
                            background-color: @color-list-active;
                        }

                        &:before {top: -1px;}
                        &:after {bottom: -1px;}
                    }
                }
            }
        }

        @max-level: 10;

        .tree-view-paddings (@level) when (@level > 0) {
            > li {
                > ol {
                    > li > div {
                        margin-left: -20-(@max-level - @level)*20px;
                        padding-left: 61+(@max-level - @level + 1)*10px;

                        > a {
                            margin-left: -61-(@max-level - @level + 1)*10px;
                            padding-left: 61+(@max-level - @level + 1)*10px;
                        }

                        &:before {
                            margin-left: (@max-level - @level + 1)*10px;
                        }

                        > span.expand {
                            left: 2+(@max-level - @level + 1)*10px;
                        }
                    }

                    .tree-view-paddings(@level - 1);
                }
            }
        }

        .tree-view-paddings (@max-level);
    }

    p.no-data {
        padding: 18px 0;
        margin: 0;
        color: @color-filelist-norecords-text;
        font-size: 12px;
        text-align: center;
        font-weight: 400;
    }
}

// Retina 
@media only screen and (-moz-min-device-pixel-ratio: 1.5), only screen and (-o-min-device-pixel-ratio: 3/2), only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (min-devicepixel-ratio: 1.5), only screen and (min-resolution: 1.5dppx) {
    .control-treeview {
        ol {
            > li {
                > div{
                    &:before {
                        background-position: 0px -79px;
                        background-size: 21px auto;
                    }
                }

                &.has-subitems > div {
                    &:before {background-position: 0px -52px;}
                    &:hover:before {background-position: 0px -102px;}
                }

                &.dragged > div, &.dragged li > div, > div:hover {
                    &:before {background-position: 0px -129px;}
                }

                &.dragged {
                    li.has-subitems, &.has-subitems {
                        > div:before {
                            background-position: 0px -102px;
                        }
                    }
                }

                &.drop-target {
                    > div:before {
                        background-position: 0px -129px;
                    }

                    &.has-subitems > div:before {
                        background-position: 0px -102px;
                    }
                }
            }
        }
    }
}