- Document Number
011
- Subject of Record
- SYSTEM FONT STACKS DONE RIGHT
- Prepared By
- TULIO CUNHA
- Date Filed
- SEP 15, 2025
- Classification
- INTERNAL TECHNICAL MEMORANDUM
System font stacks done right
SUBJECT BRIEF
Use the system fonts so your site looks native on each platform (SF on Apple devices).

Opening
On Apple devices, the -apple-system face maps to the San Francisco family. Prefer the system stack instead of self-hosting SF—it's consistent with platform typography and avoids licensing pitfalls.
:root {
--font-sans:
-apple-system, system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Apple Color Emoji",
"Segoe UI Emoji";
}END OF MEMORANDUM