I added CSS, but the text color and margins didn't change.It worked when I rewrote the same specification at the bottom of ...

Tony Patton focuses on CSS fundamentals and explains how multiple rules for the same element are handled. Multiple rules ensure that there will be no surprises for either you or the user community.

Create your own CSS fixed or fluid layouts for websites, blogs and software. The basic format for a CSS layout begins with the container settings, then the header, a horizontal navigational section, ...