Top seven free color contrast checkers & analyzers - Axess Lab
"Here are seven great free tools that help you measure color contrasts and create beautiful, accessible color schemes that fulfill the contrast requirements in the Web Content Accessibility Guidelines (WCAG)."
How the Internet Killed Squares – The Ringer
"According to research, it’s harder for the brain to process sharp edges — the cognitive load is lessened with rounded shapes. Essentially, softening things allows the brain to be a little lazier and more easily interpret what it’s seeing."
The State of CSS Animation
"The CSS motion-path module, contain, will-change and the prefers-reduced-motion media query (not yet a standard and WebKit only) are the current upcoming features for CSS animators."
Intrusive Interstitials: Guidelines To Avoiding Google's Penalty – Smashing Magazine
"Google is aware that many websites are supported by ads."
Methods for Contrasting Text Against Backgrounds | CSS-Tricks
"I can't really understand blend modes or normally see a difference between difference and exclusion, but according to MDN, they're pretty much the same, with exclusion having less contrast."
Refer to the spec: Introduction
"You can make a wrapped layout with flexbox, therefore laying things out in two dimensions. However alignment happens in a single dimension, based on the content size and available space in the main axis."