update readme

Author: VolksRat71

README.md

@@ -18,6 +18,15 @@ Each step features:
 - Video player controls (play/pause, seek, speed, captions)
 - Visual highlighting of key concepts
 
+## Mobile Support
+
+The visualization is fully responsive with a mobile-optimized experience:
+
+- **Auto-scrolling**: On mobile viewports (≤1000px), the page automatically scrolls to follow the animation. Scroll targets are driven by Whisper timestamp data, keeping the focal point (browser → network → server → explanation) in view as the narration progresses.
+- **Sticky video controls**: Play/pause and timeline controls stay fixed at the bottom for easy access while scrolling.
+- **Mobile captions**: Word-by-word captions appear in the video controls area on mobile.
+- **Responsive layouts**: Grids stack vertically, font sizes scale appropriately, and touch-friendly controls.
+
 ## Multi-Audience Support
 
 The visualization supports three audience levels, each with tailored narration: