What are some examples of guidelines that this follows? What has this done differently than other CSS frameworks? I'm not seeing anything obvious, and there ar

What are some examples of guidelines that this follows? What has this done differently than other CSS frameworks? I'm not seeing anything obvious, and there are some clear deviations – like Puppertino's advice to "always include a placeholder" when validating fields, whereas the HIG has no guidance on the subject. Edit: maybe this is just reusing some components from the HIG? https://developer.apple.com/design/human-interface-guidelines/components/all-components https://developer.apple.com/design/human-interface-guideline...