diff --git a/src/app.css b/src/app.css
index 90ad8d978..bdf40f962 100644
--- a/src/app.css
+++ b/src/app.css
@@ -14,18 +14,22 @@ body {
 
 
 /* Keep the page outline visually quiet: one rail, no stepped connectors. */
-#nd-toc > div > div {
+#nd-toc > div > div,
+[data-toc-popover-content] div.relative.flex.flex-col:has(> a[href^="#"]) {
   border-inline-start: 1px solid color-mix(in oklab, var(--color-fd-foreground) 10%, transparent);
   margin-inline-start: 0.53125rem;
 }
 
 #nd-toc > div > div > a > svg,
-#nd-toc > div > div > div.absolute {
+#nd-toc > div > div > div.absolute,
+[data-toc-popover-content] a[href^="#"] > svg,
+[data-toc-popover-content] div.relative.flex.flex-col:has(> a[href^="#"]) > div.absolute {
   display: none;
 }
 
 /* Keep every active segment on one x-axis, even when labels are indented. */
-#nd-toc > div > div > a[data-active="true"]::before {
+#nd-toc > div > div > a[data-active="true"]::before,
+[data-toc-popover-content] a[href^="#"][data-active="true"]::before {
   content: "";
   position: absolute;
   inset-block: -0.375rem;
diff --git a/tests/fumapress-static-build.test.mjs b/tests/fumapress-static-build.test.mjs
index 19d1aa375..e3291f82e 100644
--- a/tests/fumapress-static-build.test.mjs
+++ b/tests/fumapress-static-build.test.mjs
@@ -14,7 +14,9 @@ test("the documentation keeps a neutral base with custom section and TOC treatme
   assert.match(css, /#nd-toc > div > div/);
   assert.match(css, /#nd-toc > div > div > a > svg/);
   assert.match(css, /#nd-toc > div > div > div\.absolute/);
+  assert.match(css, /\[data-toc-popover-content\].*> div\.absolute/s);
   assert.match(css, /a\[data-active="true"\]::before/);
+  assert.match(css, /\[data-toc-popover-content\] a\[href\^="#"\]\[data-active="true"\]::before/);
   assert.match(css, /inset-inline-start: 0\.5rem/);
   assert.match(css, /border-radius: 0/);
 });