diff --git a/src/database/blocks/IndexTree.module.css b/src/database/blocks/IndexTree.module.css
index 23190b7..7cd838d 100644
--- a/src/database/blocks/IndexTree.module.css
+++ b/src/database/blocks/IndexTree.module.css
@@ -43,26 +43,37 @@
     display: inline-block;
     height: 20px;
     width: 9px;
-    background: url(../assets/images/tree_line.png);
+    background: url(../assets/images/tree_line.png) no-repeat -18px 0;
 }
-.indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-indent .rc-tree-indent-unit:not(:last-child)) {
+/* treeData has a single root, so the first indent unit never carries a line. */
+.indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-indent .rc-tree-indent-unit:first-child) {
+    display: none;
+}
+.indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-indent .rc-tree-indent-unit:not(.rc-tree-indent-unit-end)) {
     background-position: -9px 0;
 }
-.indexTree:global(
-    .rc-tree .rc-tree-treenode .rc-tree-indent .rc-tree-indent-unit:not(:last-child).rc-tree-indent-unit-end
-) {
-    background-position: -18px 0;
+/* The node's own branch (├ or └) is drawn after the indent units. */
+.indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-indent)::after {
+    content: "";
+    display: inline-block;
+    vertical-align: bottom;
+    height: 20px;
+    width: 9px;
+    background: url(../assets/images/tree_line.png) no-repeat 0 0;
 }
-.indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-indent .rc-tree-indent-unit:last-child.rc-tree-indent-unit-end) {
+.indexTree:global(.rc-tree .rc-tree-treenode.rc-tree-treenode-leaf-last .rc-tree-indent)::after {
     background-position: -27px 0;
 }
+.indexTree:global(.rc-tree .rc-tree-treenode:first-child .rc-tree-indent)::after {
+    display: none;
+}
 
 .indexTree:global(.rc-tree .rc-tree-treenode .rc-tree-switcher) {
     display: inline-block;
     height: 20px;
     width: 16px;
     margin-right: 2px;
-    background: url(../assets/images/tree_node.png);
+    background: url(../assets/images/tree_node.png) no-repeat;
     cursor: pointer;
 }
 .indexTree:global(.rc-tree .rc-tree-treenode:first-child .rc-tree-switcher.rc-tree-switcher-noop) {