How to make a hrefs in nav span the entire div

[keemuph]

I am trying to make my nav span the entire div, I want their background colour/target to have a width of 33%\[code\]<nav><a href="http://stackoverflow.com/questions/15736969/index.html" id="nav1">Home</a><a href="http://stackoverflow.com/questions/15736969/lesson1.html" id="nav2">Lesson 1: Intro</a><a href="http://stackoverflow.com/questions/15736969/lesson2.html" id="nav1">Lesson 2: Creating a Project</a></nav>#nav1 { background-color: #a43200; color: white; text-decoration: none; padding: 10px 100px 10px 100px; font-size: 1.3em;}#nav2 { background-color: #c73d00; color: white; padding: 10px 100px 10px 100px; font-size: 1.3em; text-decoration: none;}\[/code\]