diff --git a/src/routes/artikel.jsx b/src/routes/artikel.jsx
index ce57247..1d61fd7 100644
--- a/src/routes/artikel.jsx
+++ b/src/routes/artikel.jsx
@@ -587,20 +587,22 @@ class ArtikelSearchPage extends Component {
           />
         )}
 
-        <Box sx={{ display: 'flex', gap: 3, alignItems: 'flex-start', mb: -4 }}>
+        <Box sx={{ display: 'flex', gap: 3, alignItems: 'stretch', mb: -4 }}>
           {categoryFilterOpen && facetEntries.length > 0 && (
             <Box
               sx={{
                 width: 240,
                 flexShrink: 0,
-                alignSelf: 'stretch',
-                maxHeight: 'calc(100vh - 220px)',
+                // No intrinsic height: the results tile drives the row height
+                // and the absolutely-filled panel matches it exactly.
+                position: 'relative',
               }}
             >
               <Paper
                 variant="outlined"
                 sx={{
-                  height: '100%',
+                  position: 'absolute',
+                  inset: 0,
                   boxSizing: 'border-box',
                   display: 'flex',
                   flexDirection: 'column',