HAND GESTURES — all processing on-device, nothing leaves your browser
✌️ Two fingers + drag — move the infographic around
🤏 Pinch + move — fine-drag
🤲 Both hands pinched, spread / close — zoom in / out
☝️ Point up · down · left · right — glide that way
✋ Open palm — idle (cursor dot follows your hand)
Mouse-drag, wheel and touch-pinch also work. 📷 toggles the camera.