Write CSS styles for your elements without switching away from the HTML page that you are editing. Put the text cursor on any element tag and hit <span class="key">Cmd/Ctrl</span> + <span class="key">E</span> to start writing CSS styles.
Aru iɣunab CSS i yiferdisen-ik war ma teffɣeḍ seg usebter HTML ara tettaruḍ. Sers taḥnaccaḍt ɣef yal aferdis sakin senneḍ ɣef <span class="key"> Cmd/Ctrl</span>+<span class="key">E</span> akken ad tebduḍ tira n yiɣunab CSS.