https://github.com/yangshun/front-end-interview-handbook/blob/master/questions/css-questions.md#explain-how-a-browser-determines-what-elements-match-a-css-selector https://github.com/h5bp/Front-end-Developer-Interview-Questions/tree/master/Translations/German https://www.w3.org/Style/Examples/007/center.en.html