.gutter {
    /*background-color: #1e88e5;*/
    background-color: #f7f7f7;
    background-repeat: no-repeat;
    background-position: 50%;
}

    .gutter.gutter-horizontal {
        background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAeCAYAAADkftS9AAAAIklEQVQoU2M4c+bMfxAGAgYYmwGrIIiDjrELjpo5aiZeMwF+yNnOs5KSvgAAAABJRU5ErkJggg==');
        cursor: col-resize;
    }

    .gutter.gutter-vertical {
        background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB4AAAAFAQMAAABo7865AAAABlBMVEVHcEzMzMzyAv2sAAAAAXRSTlMAQObYZgAAABBJREFUeF5jOAMEEAIEEFwAn3kMwcB6I2AAAAAASUVORK5CYII=');
        cursor: row-resize;
    }

        /* splitter 클릭 시(:active) 색상 변경되도록 설정 */
        .gutter.gutter-horizontal:active, .gutter.gutter-vertical:active {
            background-color: #c4c4c4
        }

.h-100 {
    height: 100% !important;
}