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1. There is no one-size-fits-all solution for creating an intuitive multi-screen experience; responsive, adaptive, and fusion approaches each have pros and cons depending on the level of interactivity and content. 2. Events like clicks need to be optimized for touch by adding delays or libraries, while mouse events should be avoided; animations must be optimized to only paint necessary changes within a 16ms timeframe. 3. Pixel dimensions vary by device so the viewport meta tag is important and image sizes may need responsive alternatives; orientation media queries require caution.Read less