diff --git a/new-ui/src/app/App.tsx b/new-ui/src/app/App.tsx
index ec5f23f4..161814e4 100644
--- a/new-ui/src/app/App.tsx
+++ b/new-ui/src/app/App.tsx
@@ -1,11 +1,32 @@
 import { QueryClientProvider } from '@tanstack/react-query';
 import { RouterProvider } from '@tanstack/react-router';
+import { type as getOsType } from '@tauri-apps/plugin-os';
+import { useEffect } from 'react';
 import { MainBackground } from '../shared/components/MainBackground/MainBackground';
 import { WindowDecorations } from '../shared/components/WindowDecorations/WindowDecorations';
 import { queryClient } from './query';
 import { router } from './router';
 
+const isLinux = getOsType() === 'linux';
+
+// WebKitGTK on Linux doesn't recompute 100dvh on window resize, so on Linux
+// only we track window.innerHeight in JS instead. Windows/macOS keep the
+// native 100dvh default (--app-dvh's fallback value in _shared_tokens.scss) unchanged.
+function applyLinuxViewportHeightFix(): () => void {
+  const update = () => {
+    document.documentElement.style.setProperty('--app-dvh', `${window.innerHeight}px`);
+  };
+  update();
+  window.addEventListener('resize', update);
+  return () => window.removeEventListener('resize', update);
+}
+
 function App() {
+  useEffect(() => {
+    if (!isLinux) return;
+    return applyLinuxViewportHeightFix();
+  }, []);
+
   return (
     <div id="app">
       <MainBackground />
diff --git a/new-ui/src/pages/compact/CompactLocationsPage/style.scss b/new-ui/src/pages/compact/CompactLocationsPage/style.scss
index ede1152d..5bc5b1fc 100644
--- a/new-ui/src/pages/compact/CompactLocationsPage/style.scss
+++ b/new-ui/src/pages/compact/CompactLocationsPage/style.scss
@@ -1,7 +1,7 @@
 #compact-locations-page {
   display: flex;
   flex-flow: column;
-  height: 100dvh;
+  height: var(--app-dvh);
 
   > .compact-footer {
     display: flex;
diff --git a/new-ui/src/pages/full/OverviewPage/style.scss b/new-ui/src/pages/full/OverviewPage/style.scss
index 32d8c8a0..ef3e40bb 100644
--- a/new-ui/src/pages/full/OverviewPage/style.scss
+++ b/new-ui/src/pages/full/OverviewPage/style.scss
@@ -8,7 +8,7 @@
     height: 100%;
     width: 100%;
     overflow: hidden;
-    max-height: calc(100dvh - 50px);
+    max-height: calc(var(--app-dvh) - 50px);
   }
 
   .overview-content {
diff --git a/new-ui/src/pages/full/SessionTimeoutPage/style.scss b/new-ui/src/pages/full/SessionTimeoutPage/style.scss
index fbf91cb0..6db7d437 100644
--- a/new-ui/src/pages/full/SessionTimeoutPage/style.scss
+++ b/new-ui/src/pages/full/SessionTimeoutPage/style.scss
@@ -1,9 +1,9 @@
 #session-timeout {
-  min-height: 100dvh;
+  min-height: var(--app-dvh);
   min-width: 100%;
 
   > .positioner {
-    height: 100dvh;
+    height: var(--app-dvh);
     display: flex;
     flex-flow: column;
     align-items: center;
diff --git a/new-ui/src/shared/components/ModalFoundation/style.scss b/new-ui/src/shared/components/ModalFoundation/style.scss
index 4bdf7e72..9d014555 100644
--- a/new-ui/src/shared/components/ModalFoundation/style.scss
+++ b/new-ui/src/shared/components/ModalFoundation/style.scss
@@ -11,7 +11,7 @@
       display: block;
       content: ' ';
       width: 100%;
-      height: calc(100dvh - var(--window-decorations-height));
+      height: calc(var(--app-dvh) - var(--window-decorations-height));
       z-index: 4;
     }
 
@@ -21,7 +21,7 @@
       left: 0;
       top: var(--window-decorations-height);
       width: 100%;
-      height: calc(100dvh - var(--window-decorations-height));
+      height: calc(var(--app-dvh) - var(--window-decorations-height));
       z-index: 4;
       display: flex;
       flex-flow: column;
diff --git a/new-ui/src/shared/components/WindowDecorations/WindowDecorations.tsx b/new-ui/src/shared/components/WindowDecorations/WindowDecorations.tsx
index 3994c4b2..9d07073d 100644
--- a/new-ui/src/shared/components/WindowDecorations/WindowDecorations.tsx
+++ b/new-ui/src/shared/components/WindowDecorations/WindowDecorations.tsx
@@ -29,7 +29,7 @@ export const WindowDecorations = () => {
     const shouldReserveSpace = isFullView && osCheck && (isMac || !isDecorated);
     document.documentElement.style.setProperty(
       '--window-decorations-height',
-      shouldReserveSpace ? `${decorationsHeight}px` : '0',
+      shouldReserveSpace ? `${decorationsHeight}px` : '0px',
     );
   }, [isDecorated]);
 
diff --git a/new-ui/src/shared/components/wizard/WizardPage/style.scss b/new-ui/src/shared/components/wizard/WizardPage/style.scss
index 4d909fd7..298f6737 100644
--- a/new-ui/src/shared/components/wizard/WizardPage/style.scss
+++ b/new-ui/src/shared/components/wizard/WizardPage/style.scss
@@ -1,7 +1,7 @@
 .wizard-page {
   --page-content-limit: 536px;
 
-  height: calc(100dvh - var(--window-decorations-height));
+  height: calc(var(--app-dvh) - var(--window-decorations-height));
   overflow-y: auto;
 
   > .page-grid {
diff --git a/new-ui/src/shared/layouts/FullPageLayout/style.scss b/new-ui/src/shared/layouts/FullPageLayout/style.scss
index 59e4fd14..8ddcada7 100644
--- a/new-ui/src/shared/layouts/FullPageLayout/style.scss
+++ b/new-ui/src/shared/layouts/FullPageLayout/style.scss
@@ -2,7 +2,7 @@
   display: grid;
   grid-template-columns: 52px 1fr;
   grid-template-rows: 50px 1fr;
-  height: calc(100dvh - var(--window-decorations-height));
+  height: calc(var(--app-dvh) - var(--window-decorations-height));
   overflow: hidden;
 
   #window-header {
diff --git a/new-ui/src/shared/scss/_base.scss b/new-ui/src/shared/scss/_base.scss
index 5cef2d1e..deb782f0 100644
--- a/new-ui/src/shared/scss/_base.scss
+++ b/new-ui/src/shared/scss/_base.scss
@@ -25,7 +25,7 @@ body {
 
 #root,
 #app {
-  min-height: 100dvh;
+  min-height: var(--app-dvh);
   overflow: hidden;
 }
 
diff --git a/new-ui/src/shared/scss/_shared_tokens.scss b/new-ui/src/shared/scss/_shared_tokens.scss
index 70e43b41..70f5e366 100644
--- a/new-ui/src/shared/scss/_shared_tokens.scss
+++ b/new-ui/src/shared/scss/_shared_tokens.scss
@@ -25,6 +25,8 @@ $jetbrains:
   // set by WindowDecorations component via effect on window metadata
   // --window-decorations-height: 33px;
   --window-header-height: 50px;
+  // 100dvh on Windows/macOS; overridden in px on Linux by App.tsx, see applyLinuxViewportHeightFix
+  --app-dvh: 100dvh;
 
   // font settings
   --font-family-title: #{$geist};