/* only treeviews you tag with CssClass="no-border-tree" */
.e-treeview.no-border-tree {
    border: 0 !important;
}

.c-container {
    height: calc(100% - 12px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid #808080;
    border-radius: 6px;
    margin: 4px;
}

.scroll-wrapper {
    padding: 4px;
    flex: 1 1 auto;
    overflow: auto; /* scroll inside body if content is too long */
}