Laracasts suggestion: make completion status more obvious

I joined Laracasts only 3.5 month ago and I would like to send my congrats to the whole team: what you are doing is awesome! I learned so much in such short time. A small suggestion for the website UI: when browsing for series, I find it a bit hard to see which ones I already completed and which not. For the large cards "Series completed" is written, in some other form factors the circle color shows if it is completed, but in some cases I have to click on the card to see this info. I suggest to make it more obvious for ALL card sizes, e.g. put a green check in the corner, etc. Or even have a filter toggle on the page "show also completed".