prefers-reduced-motion: Sometimes less movement is more Thomas Steiner Mar 11, 2019 The prefers-reduced-motion media query detects whether the user has requested the operating system to minimize the amount of animation or motion it uses. Media Queries CSS
Responsive web design basics Pete LePage, Rachel Andrew Feb 12, 2019 How to create sites which respond to the needs and capabilities of the device they are viewed on. CSS Layout Mobile