diff --git a/frontend/src/components/Runtime/RuntimeControls.tsx b/frontend/src/components/Runtime/RuntimeControls.tsx
new file mode 100644
index 0000000..1d3a8ee
--- /dev/null
+++ b/frontend/src/components/Runtime/RuntimeControls.tsx
@@ -0,0 +1,401 @@
+/**
+ * RuntimeControls Component
+ *
+ * Control buttons for runtime presentations (offline toggle, fullscreen).
+ * Uses fixed pixel values (not rem or canvas units) to ensure:
+ * 1. Buttons maintain usable size regardless of canvas scaling
+ * 2. Consistent behavior during iOS pinch-zoom (avoiding WebKit rem/zoom bugs)
+ *
+ * Note: These are UI chrome controls, not design elements, so they should
+ * not scale with the canvas like navigation buttons do.
+ */
+
+import React, { CSSProperties, useEffect, useRef, useState } from 'react';
+import {
+  mdiCloudDownload,
+  mdiCloudCheck,
+  mdiCloudOff,
+  mdiFullscreen,
+  mdiFullscreenExit,
+  mdiDelete,
+} from '@mdi/js';
+import { toast } from 'react-toastify';
+import { useOfflineMode } from '../../hooks/useOfflineMode';
+import { useStorageQuota } from '../../hooks/useStorageQuota';
+import type { ProjectOfflineStatus } from '../../types/offline';
+import type { PreloadPage } from '../../types/preload';
+import { logger } from '../../lib/logger';
+
+interface RuntimeControlsProps {
+  projectId: string | null;
+  projectSlug: string;
+  projectName?: string;
+  pages?: PreloadPage[];
+  isFullscreen: boolean;
+  toggleFullscreen: () => void;
+}
+
+/**
+ * Button colors matching BaseButton 'info', 'success', 'danger', 'warning' colors
+ */
+const buttonColors = {
+  info: {
+    background: '#2563EB', // bg-blue-600
+    backgroundHover: '#1D4ED8', // bg-blue-700
+    border: '#2563EB',
+  },
+  success: {
+    background: '#059669', // bg-emerald-600
+    backgroundHover: '#047857', // bg-emerald-700
+    border: '#059669',
+  },
+  danger: {
+    background: '#DC2626', // bg-red-600
+    backgroundHover: '#B91C1C', // bg-red-700
+    border: '#DC2626',
+  },
+  warning: {
+    background: '#CA8A04', // bg-yellow-600
+    backgroundHover: '#A16207', // bg-yellow-700
+    border: '#CA8A04',
+  },
+};
+
+/**
+ * Icon component using fixed pixel sizes
+ */
+function ControlIcon({
+  path,
+  size = 20,
+  fill = 'currentColor',
+}: {
+  path: string;
+  size?: number;
+  fill?: string;
+}) {
+  return (
+    <svg
+      viewBox='0 0 24 24'
+      width={size}
+      height={size}
+      style={{
+        display: 'inline-block',
+        flexShrink: 0,
+      }}
+    >
+      <path fill={fill} d={path} />
+    </svg>
+  );
+}
+
+/**
+ * Button component using fixed pixel sizes
+ */
+function ControlButton({
+  icon,
+  color = 'info',
+  onClick,
+  disabled = false,
+  title,
+}: {
+  icon: string;
+  color?: 'info' | 'success' | 'danger' | 'warning';
+  onClick: () => void;
+  disabled?: boolean;
+  title?: string;
+}) {
+  const colors = buttonColors[color];
+
+  const buttonStyle: CSSProperties = {
+    display: 'inline-flex',
+    justifyContent: 'center',
+    alignItems: 'center',
+    padding: 8,
+    borderRadius: 6,
+    backgroundColor: colors.background,
+    borderWidth: 1,
+    borderStyle: 'solid',
+    borderColor: colors.border,
+    color: 'white',
+    cursor: disabled ? 'not-allowed' : 'pointer',
+    opacity: disabled ? 0.7 : 1,
+    transition: 'background-color 150ms, border-color 150ms',
+  };
+
+  return (
+    <button
+      type='button'
+      style={buttonStyle}
+      onClick={onClick}
+      disabled={disabled}
+      title={title}
+      onMouseEnter={(e) => {
+        if (!disabled) {
+          e.currentTarget.style.backgroundColor = colors.backgroundHover;
+          e.currentTarget.style.borderColor = colors.backgroundHover;
+        }
+      }}
+      onMouseLeave={(e) => {
+        e.currentTarget.style.backgroundColor = colors.background;
+        e.currentTarget.style.borderColor = colors.border;
+      }}
+    >
+      <ControlIcon path={icon} size={20} />
+    </button>
+  );
+}
+
+/**
+ * Delete button for removing offline data (smaller, subtle styling)
+ */
+function DeleteButton({ onClick }: { onClick: () => void }) {
+  const buttonStyle: CSSProperties = {
+    display: 'inline-flex',
+    justifyContent: 'center',
+    alignItems: 'center',
+    padding: 4,
+    borderRadius: 4,
+    backgroundColor: 'transparent',
+    border: 'none',
+    color: '#9CA3AF', // text-gray-400
+    cursor: 'pointer',
+    transition: 'color 150ms',
+  };
+
+  return (
+    <button
+      type='button'
+      style={buttonStyle}
+      onClick={onClick}
+      title='Remove offline data'
+      onMouseEnter={(e) => {
+        e.currentTarget.style.color = '#EF4444'; // text-red-500
+      }}
+      onMouseLeave={(e) => {
+        e.currentTarget.style.color = '#9CA3AF'; // text-gray-400
+      }}
+    >
+      <ControlIcon path={mdiDelete} size={16} />
+    </button>
+  );
+}
+
+/**
+ * Offline toggle component using fixed pixel sizes
+ */
+function OfflineControl({
+  projectId,
+  projectSlug,
+  projectName,
+  pages,
+}: {
+  projectId: string | null;
+  projectSlug?: string;
+  projectName?: string;
+  pages?: PreloadPage[];
+}) {
+  const {
+    isOfflineCapable,
+    isDownloaded,
+    isDownloading,
+    status,
+    progress,
+    startDownload,
+    pauseDownload,
+    deleteOfflineData,
+    estimatedSize,
+    formatSize,
+  } = useOfflineMode({
+    projectId,
+    projectSlug,
+    projectName,
+    pages,
+  });
+
+  const { canStore, isWarning, isCritical } = useStorageQuota();
+
+  // Track previous status to detect completion transition
+  const prevStatusRef = useRef<ProjectOfflineStatus>(status);
+
+  // Show toast notification when download completes
+  useEffect(() => {
+    logger.debug('[RuntimeControls] Status changed:', {
+      prev: prevStatusRef.current,
+      current: status,
+    });
+    if (prevStatusRef.current === 'downloading' && status === 'downloaded') {
+      logger.debug('[RuntimeControls] Showing toast - download complete!');
+      toast.success('Presentation ready for offline mode!', {
+        position: 'bottom-center',
+        autoClose: 5000,
+      });
+    }
+    prevStatusRef.current = status;
+  }, [status]);
+
+  // Don't render if offline not supported
+  if (!isOfflineCapable) {
+    return null;
+  }
+
+  const handleClick = () => {
+    if (isDownloaded) {
+      if (confirm('Remove offline data for this project?')) {
+        deleteOfflineData();
+      }
+    } else if (isDownloading) {
+      pauseDownload();
+    } else if (status === 'error') {
+      startDownload();
+    } else {
+      if (isCritical) {
+        alert(
+          'Storage space is critically low. Please free up some space first.',
+        );
+        return;
+      }
+      if (isWarning && estimatedSize > 0) {
+        if (
+          !confirm(
+            `Storage space is running low. Download ${formatSize(estimatedSize)} anyway?`,
+          )
+        ) {
+          return;
+        }
+      }
+      startDownload();
+    }
+  };
+
+  // Determine icon and color
+  let icon = mdiCloudDownload;
+  let color: 'info' | 'success' | 'danger' | 'warning' = 'info';
+  let title = 'Download for offline';
+
+  if (isDownloaded) {
+    icon = mdiCloudCheck;
+    color = 'success';
+    title = 'Available offline';
+  } else if (isDownloading) {
+    icon = mdiCloudDownload;
+    color = 'info';
+    title = `Downloading ${progress}%`;
+  } else if (status === 'error') {
+    icon = mdiCloudOff;
+    color = 'danger';
+    title = 'Retry download';
+  } else if (status === 'outdated') {
+    icon = mdiCloudDownload;
+    color = 'warning';
+    title = 'Update available';
+  }
+
+  const containerStyle: CSSProperties = {
+    display: 'flex',
+    alignItems: 'center',
+    gap: 4,
+  };
+
+  return (
+    <div style={containerStyle}>
+      <ControlButton
+        icon={icon}
+        color={color}
+        onClick={handleClick}
+        disabled={!canStore(estimatedSize) && !isDownloaded}
+        title={title}
+      />
+      {isDownloaded && (
+        <DeleteButton
+          onClick={() => {
+            if (confirm('Remove offline data for this project?')) {
+              deleteOfflineData();
+            }
+          }}
+        />
+      )}
+    </div>
+  );
+}
+
+/**
+ * Hook to counter pinch-zoom scaling using visualViewport API
+ * Returns a scale factor to apply as inverse transform
+ */
+function useCounterZoom() {
+  const [scale, setScale] = useState(1);
+
+  useEffect(() => {
+    // visualViewport API is supported in all modern browsers
+    const vv = window.visualViewport;
+    if (!vv) return;
+
+    const handleResize = () => {
+      // visualViewport.scale gives the pinch-zoom level
+      // We apply 1/scale to counter it
+      setScale(1 / vv.scale);
+    };
+
+    // Set initial value
+    handleResize();
+
+    vv.addEventListener('resize', handleResize);
+    vv.addEventListener('scroll', handleResize);
+
+    return () => {
+      vv.removeEventListener('resize', handleResize);
+      vv.removeEventListener('scroll', handleResize);
+    };
+  }, []);
+
+  return scale;
+}
+
+/**
+ * RuntimeControls - Main component for presentation controls
+ *
+ * Renders offline toggle and fullscreen button using fixed pixel values
+ * to maintain usable size regardless of canvas scaling.
+ * Uses visualViewport API to counter pinch-zoom scaling on mobile.
+ */
+export default function RuntimeControls({
+  projectId,
+  projectSlug,
+  projectName,
+  pages,
+  isFullscreen,
+  toggleFullscreen,
+}: RuntimeControlsProps) {
+  // Counter-scale to resist pinch-zoom
+  const counterScale = useCounterZoom();
+
+  const containerStyle: CSSProperties = {
+    position: 'fixed',
+    top: 16,
+    right: 16,
+    display: 'flex',
+    alignItems: 'center',
+    gap: 8,
+    zIndex: 9999, // Above everything including modals
+    // Counter pinch-zoom scaling
+    transform: `scale(${counterScale})`,
+    transformOrigin: 'top right',
+  };
+
+  return (
+    <div style={containerStyle}>
+      <OfflineControl
+        projectId={projectId}
+        projectSlug={projectSlug}
+        projectName={projectName}
+        pages={pages}
+      />
+      <ControlButton
+        icon={isFullscreen ? mdiFullscreenExit : mdiFullscreen}
+        color='info'
+        onClick={toggleFullscreen}
+        title={isFullscreen ? 'Exit fullscreen' : 'Enter fullscreen'}
+      />
+    </div>
+  );
+}
diff --git a/frontend/src/components/RuntimePresentation.tsx b/frontend/src/components/RuntimePresentation.tsx
index e440560..f2b2ba1 100644
--- a/frontend/src/components/RuntimePresentation.tsx
+++ b/frontend/src/components/RuntimePresentation.tsx
@@ -5,7 +5,6 @@
  * Used by /p/[projectSlug] and /p/[projectSlug]/stage routes.
  */
 
-import { mdiFullscreen, mdiFullscreenExit } from '@mdi/js';
 import Head from 'next/head';
 import React, {
   ReactElement,
@@ -17,9 +16,8 @@ import React, {
 } from 'react';
 import { ToastContainer } from 'react-toastify';
 import 'react-toastify/dist/ReactToastify.css';
-import BaseButton from './BaseButton';
 import CardBox from './CardBox';
-import { OfflineToggle } from './Offline/OfflineToggle';
+import RuntimeControls from './Runtime/RuntimeControls';
 import RuntimeElement from './RuntimeElement';
 import TransitionPreviewOverlay from './Constructor/TransitionPreviewOverlay';
 import GalleryCarouselOverlay from './UiElements/GalleryCarouselOverlay';
@@ -693,24 +691,6 @@ export default function RuntimePresentation({
             </div>
             {/* End page elements wrapper */}
 
-            {/* Controls: Offline toggle and Fullscreen button */}
-            <div className='absolute top-4 right-4 z-50 flex items-center gap-2'>
-              <OfflineToggle
-                projectId={project?.id || null}
-                projectSlug={projectSlug}
-                projectName={project?.name}
-                pages={pages}
-                showLabel={false}
-                size='small'
-              />
-              <BaseButton
-                icon={isFullscreen ? mdiFullscreenExit : mdiFullscreen}
-                color='info'
-                small
-                onClick={toggleFullscreen}
-              />
-            </div>
-
             {/* Transition overlay - uses useTransitionPlayback hook for smooth transitions */}
             {/* Opacity is 0 during 'preparing' phase to show old page while video loads */}
             {/* NO fade-out: video itself IS the transition (last frame = new page) */}
@@ -785,6 +765,17 @@ export default function RuntimePresentation({
         </div>
         {/* End inner canvas container */}
 
+        {/* Controls: Offline toggle and Fullscreen button */}
+        {/* Positioned outside canvas to avoid scaling with canvas transform */}
+        <RuntimeControls
+          projectId={project?.id || null}
+          projectSlug={projectSlug}
+          projectName={project?.name}
+          pages={pages}
+          isFullscreen={isFullscreen}
+          toggleFullscreen={toggleFullscreen}
+        />
+
         {/* Toast notifications for offline download status */}
         <ToastContainer
           position='bottom-center'
diff --git a/frontend/src/types/css.d.ts b/frontend/src/types/css.d.ts
new file mode 100644
index 0000000..f67567e
--- /dev/null
+++ b/frontend/src/types/css.d.ts
@@ -0,0 +1,9 @@
+/**
+ * Type declarations for CSS module imports
+ */
+declare module '*.css' {
+  const content: { [className: string]: string };
+  export default content;
+}
+
+declare module 'react-toastify/dist/ReactToastify.css';