What is with the font joining the character c and t on this site?(In headings)
These are ligatures. I got the code to enable them from Kenneth's excellent Normalize-Opentype.css [0]
[0]: https://kennethormandy.com/journal/normalize-opentype-css/
https://fonts.google.com/specimen/Lato?preview.text=Reaction...
EDIT: It's called ligatures: https://developer.mozilla.org/en-US/docs/Web/CSS/font-varian.... The CSS for headings on this site turns on some extra ligatures.
(So does `font-feature-settings: "dlig" 1`, which is the low-level equivalent; the site includes both.)
h1, h2, h3 {
font-feature-settings: "kern" 1, "liga" 1, "pnum" 1, "tnum" 0, "onum" 1, "lnum" 0, "dlig" 1;
font-variant-ligatures: discretionary-ligatures;
}