I had missed the "if you could" part, sorry. Browsers are actually okay with <style> tags in the <body> and apply the rules inside. Although MDN says they must

I had missed the "if you could" part, sorry. Browsers are actually okay with <style> tags in the <body> and apply the rules inside. Although MDN says they must be placed in the <head> [1]. Email clients seem to be a lot more restrictive, apparently. Or lazy. [1](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/style https://developer.mozilla.org/en-US/docs/Web/HTML/Element/st...)