diff --git a/src/gui/components/_legacy.py b/src/gui/components/_legacy.py
index ab55992..c8da91c 100644
--- a/src/gui/components/_legacy.py
+++ b/src/gui/components/_legacy.py
@@ -628,15 +628,6 @@ def render_sticky_footer() -> None:
     st.markdown(
         """
 <style>
-/* The view container is the element whose background paints the
-   strip between the last piece of content and the fixed footer
-   overlay (confirmed via colored-tag diagnostic). ``.stApp`` carries
-   ``zoom: 0.85`` so 100vh renders at 85% visually — divide by 0.85
-   so the container spans the full visible viewport and there's no
-   gap for its own background to show through as a "white bar". */
-[data-testid="stAppViewContainer"] {
-    min-height: calc(100vh / 0.85) !important;
-}
 [data-testid="stAppViewBlockContainer"] {
     /* Reserve room for the fixed footer overlay (footer min-height
        32px + 0.25rem * 2 padding ≈ 2rem). */
@@ -880,6 +871,37 @@ a[data-testid="stPageLink-NavLink"][href*="close"] {
 
       doc.body.appendChild(div);
       doc.body.appendChild(pop);
+
+      // Push the footer's left edge to start at the sidebar's right
+      // edge so its near-white background doesn't paint over the
+      // sidebar's gray and read as a visible "white bar" along the
+      // bottom of the sidebar. Same offset for the help popover.
+      // Re-measure whenever the sidebar resizes (collapse/expand)
+      // so the offset tracks the live layout.
+      var sb = doc.querySelector('[data-testid="stSidebar"]');
+      function applyOffset() {{
+        var off = 0;
+        if (sb) {{
+          var r = sb.getBoundingClientRect();
+          // If the sidebar is collapsed it can have width 0 OR be
+          // pushed off-screen (negative right). Clamp to 0 so the
+          // footer goes flush-left in that case.
+          off = Math.max(0, Math.round(r.right));
+        }}
+        // ``!important`` because the CSS rule for ``left`` is itself
+        // ``!important`` and would otherwise win over plain inline.
+        div.style.setProperty('left', off + 'px', 'important');
+        pop.style.setProperty('left', (off + 12) + 'px', 'important');
+      }}
+      applyOffset();
+      if (sb && 'ResizeObserver' in window) {{
+        try {{ new ResizeObserver(applyOffset).observe(sb); }} catch (e) {{}}
+      }}
+      // Also re-measure on window resize as a belt-and-suspenders
+      // — handles viewport changes that don't trigger the sidebar's
+      // own resize event.
+      var win = doc.defaultView || window.parent || window;
+      try {{ win.addEventListener('resize', applyOffset); }} catch (e) {{}}
     }}
     try {{
       build(window.parent.document);