Allgemeine Tipps, Tricks für CSS.

Style Links depending on Destination: https://css-tricks.com/snippets/css/style-links-depending-on-destination/

FontAwesome CheatSheet: https://fontawesome.com/v5/cheatsheet

CSS Selektoren. https://www.w3schools.com/cssref/css_selectors.asp

Vertikaler Abstand zwischen Elementen und Fonts, Line-Height, Baseline & Co.

https://gridlover.net/try