How can you properly build a genuinely comprehensive responsive design system covering typography, spacing, and component sizing that consistently and genuinely scales appropriately across your app's entire genuinely full range of supported screen sizes?

A genuinely comprehensive responsive design system typically defines a set of genuinely scalable spacing and typography values, expressed as a function of the current available screen size or a genuinely defined set of discrete breakpoint tiers rather than fixed absolute pixel values, letting text, padding, and individual component sizing all scale consistently and proportionally together as a user genuinely moves between a phone, a tablet, and a genuinely much larger desktop monitor, and centralizing this particular comprehensive scaling logic within your own app's central theme ensures every single screen throughout the entire app consistently benefits from that same underlying genuinely well considered responsive scaling behavior.

double responsiveSpacing(BuildContext context) {
  final width = MediaQuery.of(context).size.width;
  return width > 900 ? 32 : (width > 600 ? 24 : 16);
}