diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index e3cf9cf..5981eeb 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -15,6 +15,8 @@
         "title": "TutaBridge",
         "width": 700,
         "height": 520,
+        "minWidth": 700,
+        "minHeight": 520,
         "resizable": true,
         "center": true
       }
diff --git a/ui/src/App.css b/ui/src/App.css
index 3e61e92..18779c4 100644
--- a/ui/src/App.css
+++ b/ui/src/App.css
@@ -79,8 +79,17 @@
 /* ── Content ── */
 .app-content {
   flex: 1;
-  overflow-y: auto;
+  min-height: 0;
+  overflow: hidden;
   padding: 24px;
+  display: flex;
+  flex-direction: column;
+}
+
+/* The single active panel fills the content area. */
+.app-content > * {
+  flex: 1;
+  min-height: 0;
 }
 
 /* ── Shared ── */
@@ -518,7 +527,7 @@ button.small {
   max-width: none;
   display: flex;
   flex-direction: column;
-  height: calc(100vh - 120px);
+  min-height: 0;
 }
 
 .logs-header {
@@ -534,6 +543,7 @@ button.small {
 
 .logs-container {
   flex: 1;
+  min-height: 0;
   overflow-y: auto;
   background: var(--surface-container);
   border: 1px solid var(--outline-variant);
diff --git a/ui/src/index.css b/ui/src/index.css
index 889f111..c2f2ecb 100644
--- a/ui/src/index.css
+++ b/ui/src/index.css
@@ -77,14 +77,21 @@
   }
 }
 
+/* App is a fixed shell: no scrollbars anywhere. Scrollable regions (logs)
+   still scroll via wheel/keys, just without visible bars. */
 * {
   box-sizing: border-box;
+  scrollbar-width: none;
 }
 
-body {
-  margin: 0;
+*::-webkit-scrollbar {
+  display: none;
 }
 
+html,
+body,
 #root {
   height: 100vh;
+  margin: 0;
+  overflow: hidden;
 }