1 Remember the "C" of CSS! Therefore: work as much as possible in the TOP-DOWN approach of a page, and write the css in the same order. The main logic of css: a liquid tree upside down. Replacing a small stone halfway a cascade can change the bed of 20 rivers down under! Inside cascade branches like a <div>: work also a.m.a.p. in the top-down approach. 2 Do it STEP-BY-STEP, and first