diff --git a/graphlink_desktop.py b/graphlink_desktop.py
index 9a91c3d..9cabd1f 100644
--- a/graphlink_desktop.py
+++ b/graphlink_desktop.py
@@ -207,27 +207,6 @@ def main() -> int:
         return 1
     logger.info("backend healthy at %s", base_url)
 
-    # Canvas drag fix, corrected delivery (full audit, 2026-08-14): recent
-    # WebView2 builds hand independently-composited page layers to Windows'
-    # compositor to assemble on screen; a dragged node card and the redrawn
-    # connection lines can land one display frame apart. The first attempt
-    # at disabling that (#323) passed --disable-features=DelegatedCompositing
-    # through this environment variable - and the audit found it NEVER took
-    # effect: pywebview's own Windows backend passes
-    # --disable-features=ElasticOverscroll in the browser arguments it
-    # builds (site-packages/webview/platforms/edgechromium.py), duplicate
-    # --disable-features switches resolve last-one-wins, so one of the two
-    # lists was silently discarded. The reliable delivery is to put BOTH
-    # feature names in ONE merged list here: whichever --disable-features
-    # value wins, it now carries DelegatedCompositing (and keeps pywebview's
-    # ElasticOverscroll intent). Unknown feature names are ignored by
-    # runtimes that predate them, so this stays inert where not applicable.
-    _composition_flags = "--disable-features=ElasticOverscroll,DelegatedCompositing"
-    _existing_args = os.environ.get("WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS", "")
-    os.environ["WEBVIEW2_ADDITIONAL_BROWSER_ARGUMENTS"] = (
-        f"{_existing_args} {_composition_flags}".strip()
-    )
-
     import webview  # pywebview - the native (non-Qt, non-browser) window
 
     # The token reaches the SPA as a URL FRAGMENT, which the browser never
diff --git a/web_ui/src/app/styles.css b/web_ui/src/app/styles.css
index 562e884..40f29bb 100644
--- a/web_ui/src/app/styles.css
+++ b/web_ui/src/app/styles.css
@@ -43,13 +43,6 @@ body,
 #root {
   height: 100%;
   margin: 0;
-  /* Theme-matched page background (dark drag-parity audit): with no
-     explicit background the page root stays transparent, so any region the
-     renderer clears or presents before content paint resolves to the
-     embedding window's own backdrop rather than the theme's canvas color.
-     Painting the root opaquely in the theme's window color makes both
-     themes behave identically at that boundary. */
-  background-color: var(--gl-surface-window);
 }
 
 .app-shell {
@@ -410,28 +403,13 @@ body,
   font-size: var(--gl-node-font-size, 11px);
 }
 
-/* Dark-theme drag-parity fix (full audit, 2026-08-14): the connection line
-   used to be painted at stroke-width 1.5 in --gl-surface-border-strong -
-   #505050 on dark's #1E1E1E canvas (a BRIGHT light-on-dark hairline,
-   ~2.07:1) vs #AFAFAF on light's #E1E1E1 (a soft dark-on-light line,
-   ~1.68:1). A sub-2px stroke drops into the renderer's hairline
-   anti-aliasing regime below ~67% zoom, whose stepping is visibly harsher
-   for light-on-dark than dark-on-light - so the identical drag produced a
-   line that visibly crawled/stepped against the node in dark while reading
-   as smooth in light. Three equalizers: a dedicated per-theme stroke token
-   (--gl-graph-edge-stroke: dark #444444 reproduces light's contrast RATIO
-   on the dark canvas; light keeps #AFAFAF unchanged), stroke-width 2 to
-   stay out of hairline mode at working zooms, and geometricPrecision to
-   pin high-quality anti-aliasing rather than pixel snapping. */
 .scene-canvas .react-flow__edge-path {
-  stroke: var(--gl-graph-edge-stroke, var(--gl-surface-border-strong, var(--gl-surface-text-muted)));
-  stroke-width: 2;
-  shape-rendering: geometricPrecision;
+  stroke: var(--gl-surface-border-strong, var(--gl-surface-text-muted));
+  stroke-width: 1.5;
 }
 
 .scene-canvas .react-flow__edge.selected .react-flow__edge-path {
   stroke: var(--gl-surface-text-primary);
-  shape-rendering: geometricPrecision;
 }
 
 .scene-minimap {
diff --git a/web_ui/src/lib/tokens/gl-vars-dev.css b/web_ui/src/lib/tokens/gl-vars-dev.css
index a873f1d..6a05e26 100644
--- a/web_ui/src/lib/tokens/gl-vars-dev.css
+++ b/web_ui/src/lib/tokens/gl-vars-dev.css
@@ -118,7 +118,6 @@
   --gl-frame-purple: #7c7c7c;
   --gl-frame-red: #7c7c7c;
   --gl-frame-yellow: #8e8e8e;
-  --gl-graph-edge-stroke: #444444;
   --gl-graph-node-badge-fill: #484848;
   --gl-graph-node-body-end: #292929;
   --gl-graph-node-body-start: #303030;
@@ -150,9 +149,9 @@
   --gl-semantic-status-info: #828282;
   --gl-semantic-status-success: #838383;
   --gl-semantic-status-warning: #919191;
-  --gl-shadow-1: 0 1px 3px rgba(0, 0, 0, 0.18);
-  --gl-shadow-2: 0 4px 12px rgba(0, 0, 0, 0.203);
-  --gl-shadow-3: 0 8px 28px rgba(0, 0, 0, 0.248);
+  --gl-shadow-1: 0 1px 3px rgba(0, 0, 0, 0.40);
+  --gl-shadow-2: 0 4px 12px rgba(0, 0, 0, 0.45);
+  --gl-shadow-3: 0 8px 28px rgba(0, 0, 0, 0.55);
   --gl-space-1: 4px;
   --gl-space-2: 8px;
   --gl-space-3: 12px;
@@ -253,7 +252,6 @@
     --gl-frame-purple: #838383;
     --gl-frame-red: #838383;
     --gl-frame-yellow: #717171;
-    --gl-graph-edge-stroke: #AFAFAF;
     --gl-graph-node-badge-fill: #B7B7B7;
     --gl-graph-node-body-end: #D6D6D6;
     --gl-graph-node-body-start: #CFCFCF;
@@ -384,7 +382,6 @@
   --gl-frame-purple: #838383;
   --gl-frame-red: #838383;
   --gl-frame-yellow: #717171;
-  --gl-graph-edge-stroke: #AFAFAF;
   --gl-graph-node-badge-fill: #B7B7B7;
   --gl-graph-node-body-end: #D6D6D6;
   --gl-graph-node-body-start: #CFCFCF;