I’m no CSS expert, but that may be a bit much to do with only CSS, haha...
There are rounded borders (ex: {borders: 2px rounded black}) and you can increase their thickness, but that’s all I got lol I have no idea how to replicate a glare
I’d suggest possibly using the border as a pfp mask, instead. I, er, don’t really have much experience with coding pfp masks, but there’s a lot of layouts that have the code for them and they all seem to use similar codes so it shouldn’t be too hard to figure out what does what (my first thought was to get a transparent image of the Windows border, get the image’s URL, and replace a layout code with that LOL)