This is an example or typesetting an approximation of the Overleaf logo, using the freely available fonts TeX Gyre Adventor and academicons.
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It was bound to happen. Now besides coffee stains, you can also add wine stains to your LaTeX document!
wine.sty is actually Hanno Rein's coffee4.sty, with all the 'coffee' replaced by 'wine' in the code, and replaced colour definitions.