@masukomi I've preferred #CSS text sizing with ems, since @Richr wrote about it in 2004:
Quoting:
"Like it or not, your readers **will** want to resize text at some point. Perhaps they are short-sighted, doing a presentation, using a ridiculously high resolution laptop or simply have tired eyes."
This was all pre-"responsive" web design, but it makes for much more scalable designs across text sizes. The calculations were tedious back then, but now easily computed.