diff --git a/changelog.md b/changelog.md
index 314002d..173457f 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2026-01-04 - 3.5.2 - fix(elements)
+delay hiding sidebar and properties panels during native-mode transition and use transparent rgba border for frame to avoid layout jumps
+
+- Add isHidden state to wcc-sidebar and wcc-properties and switch display bindings to use isHidden instead of directly using isNative
+- Introduce a 300ms delayed hide when entering native mode so UI hides after frame animation completes; show immediately when exiting native mode
+- Replace hardcoded hex border values in wcc-frame with rgba and set native border to a transparent 0px to prevent abrupt visual jumps
+
 ## 2026-01-04 - 3.5.1 - fix(sidebar)
 disable frame CSS transition while user is resizing the sidebar to prevent janky animations
 
diff --git a/ts_web/00_commitinfo_data.ts b/ts_web/00_commitinfo_data.ts
index c199f82..192d222 100644
--- a/ts_web/00_commitinfo_data.ts
+++ b/ts_web/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@design.estate/dees-wcctools',
-  version: '3.5.1',
+  version: '3.5.2',
   description: 'A set of web component tools for creating element catalogues, enabling the structured development and documentation of custom elements and pages.'
 }
diff --git a/ts_web/elements/wcc-frame.ts b/ts_web/elements/wcc-frame.ts
index 0709d3d..d198750 100644
--- a/ts_web/elements/wcc-frame.ts
+++ b/ts_web/elements/wcc-frame.ts
@@ -28,7 +28,7 @@ export class WccFrame extends DeesElement {
   public static styles = [
     css`
       :host {
-        border: 10px solid #ffaeaf;
+        border: 10px solid rgba(255, 174, 175, 1);
         position: absolute;
         background: ${cssManager.bdTheme('#333', '#000')};
         right: 0px;
@@ -52,14 +52,14 @@ export class WccFrame extends DeesElement {
       <style>
         :host {
           ${this.isNative ? `
-            border: none !important;
+            border: 0px solid rgba(255, 174, 175, 0) !important;
             left: 0px !important;
             right: 0px !important;
             top: 0px !important;
             bottom: 0px !important;
           ` : `
             bottom: ${this.advancedEditorOpen ? '400px' : '100px'};
-            border: 10px solid #ffaeaf;
+            border: 10px solid rgba(255, 174, 175, 1);
             left: ${this.sidebarWidth}px;
           `}
           transition: ${this.isResizing ? 'none' : 'all 0.3s ease'};
diff --git a/ts_web/elements/wcc-properties.ts b/ts_web/elements/wcc-properties.ts
index 760ff0f..8b474d2 100644
--- a/ts_web/elements/wcc-properties.ts
+++ b/ts_web/elements/wcc-properties.ts
@@ -63,6 +63,10 @@ export class WccProperties extends DeesElement {
   @state()
   accessor recordingDuration: number = 0;
 
+  // Delayed hide for native mode transition
+  @state()
+  accessor isHidden: boolean = false;
+
   public editorHeight: number = 300;
 
   public render(): TemplateResult {
@@ -99,7 +103,7 @@ export class WccProperties extends DeesElement {
           overflow: hidden;
           background: var(--background);
           color: var(--foreground);
-          display: ${this.isNative ? 'none' : 'block'};
+          display: ${this.isHidden ? 'none' : 'block'};
         }
         .grid {
           display: grid;
@@ -931,6 +935,19 @@ export class WccProperties extends DeesElement {
   protected updated(changedProperties: Map<string, unknown>) {
     super.updated(changedProperties);
 
+    // Handle delayed hide for native mode transition
+    if (changedProperties.has('isNative')) {
+      if (this.isNative) {
+        // Delay hiding until frame animation completes
+        setTimeout(() => {
+          this.isHidden = true;
+        }, 300);
+      } else {
+        // Show immediately when exiting native mode
+        this.isHidden = false;
+      }
+    }
+
     // Only recreate properties when selectedItem changes
     if (changedProperties.has('selectedItem')) {
       this.createProperties().catch(error => {
diff --git a/ts_web/elements/wcc-sidebar.ts b/ts_web/elements/wcc-sidebar.ts
index 28d5bab..7728f60 100644
--- a/ts_web/elements/wcc-sidebar.ts
+++ b/ts_web/elements/wcc-sidebar.ts
@@ -44,6 +44,10 @@ export class WccSidebar extends DeesElement {
   @state()
   accessor isResizing: boolean = false;
 
+  // Delayed hide for native mode transition
+  @state()
+  accessor isHidden: boolean = false;
+
   private sectionsInitialized = false;
 
   public render(): TemplateResult {
@@ -67,7 +71,7 @@ export class WccSidebar extends DeesElement {
           --ring: #3b82f6;
           --radius: 4px;
 
-          display: ${this.isNative ? 'none' : 'block'};
+          display: ${this.isHidden ? 'none' : 'block'};
           border-right: 1px solid rgba(255, 255, 255, 0.08);
           font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
           font-size: 14px;
@@ -732,6 +736,19 @@ export class WccSidebar extends DeesElement {
   protected updated(changedProperties: Map<string, unknown>) {
     super.updated(changedProperties);
 
+    // Handle delayed hide for native mode transition
+    if (changedProperties.has('isNative')) {
+      if (this.isNative) {
+        // Delay hiding until frame animation completes
+        setTimeout(() => {
+          this.isHidden = true;
+        }, 300);
+      } else {
+        // Show immediately when exiting native mode
+        this.isHidden = false;
+      }
+    }
+
     // Auto-expand folder when a multi-demo element is selected
     if (changedProperties.has('selectedItem') && this.selectedItem && this.dashboardRef?.sections) {
       // Find the element in any section