Nate написалLikely you can fix that by adding <meta charset="utf-8"> inside your <head> tag, or immediately after the <html> tag if you don't use <head>.
Thanks for pointing it out! I fixed it although I alreafy had it in the head of my index! (I simply changed the character).
About the transparent background thing, I tried setting the data-background-color to none, transparent, #ffffff00, and rgba(255,255,255,0) but they all don't work, so I suppose it is not supported right?