## Lists as Navigation

Nested list styled as "clamshell" navigation.

- remove list styling
- make "a" element "block" display
- styles for secondary nested lists (e.g. selector for `ul ul a`)
- `display: none` for nested lists that you don't want to display

Example 7.3 - Nested lists for 'clamshell' navigation - Example 7.3<nav id="navclam"><ul><li><a href="http://big12sports.collegesports.com/">Big XII</a><ul><li><a href="http://www.baylor.edu/">Baylor</a></li><li><a href="http://www.iastate.edu/">Iowa State</a></li><li><a href="http://www.ku.edu/">Kansas</a></li><li><a href="http://www.ksu.edu/">Kansas State</a></li><li><a href="http://www.ou.edu/">Oklahoma</a></li><li><a href="http://www.okstate.edu/">Oklahoma State</a></li><li><a href="http://www.tcu.edu/">Texas Christian</a></li><li><a href="http://www.utexas.edu/">Texas</a></li><li><a href="http://www.ttu.edu/">Texas Tech</a></li><li><a href="http://www.wvu.edu/">West Virginia</a></li></ul></li><li><a href="http://www.ivyleaguesports.com/">Ivy League</a><ul class="collapse"><li><a href="http://www.brown.edu/">Brown</a></li><li><a href="http://www.columbia.edu/">Columbia</a></li><li><a href="http://www.cornell.edu/">Cornell</a></li><li><a href="http://www.dartmouth.edu/">Dartmouth</a></li><li><a href="http://www.harvard.edu/">Harvard</a></li><li><a href="http://www.upenn.edu/">Penn</a></li><li><a href="http://www.princeton.edu/">Princeton</a></li><li><a href="http://www.yale.edu/">Yale</a></li></ul></li><li><a href="http://www.pac-12.com/">Pac 12</a><ul class="collapse"><li><a href="http://www.arizona.edu/">Arizona</a></li><li><a href="http://www.asu.edu/">Arizona State</a></li><li><a href="http://www.berkeley.edu/">California</a></li><li><a href="http://www.cu.edu/">Colorado</a></li><li><a href="http://www.uoregon.edu/">Oregon</a></li><li><a href="http://www.oregonstate.edu/">Oregon State</a></li><li><a href="http://www.stanford.edu/">Stanford</a></li><li><a href="http://www.ucla.edu/">UCLA</a></li><li><a href="http://www.usc.edu/">USC</a></li><li><a href="http://www.utah.edu/">Utah</a></li><li><a href="http://www.washington.edu/">Washington</a></li><li><a href="http://www.wsu.edu/">Washington State</a></li></ul></li></ul></nav>#navclam { font-family: Arial, Verdana, Helvetica, sans-serif; font-weight: bold; font-size: 1.2em; width: 10em; border-right: 1px solid #333; margin-bottom: 1em; background-color: #ddd; color: #900; } #navclam ul { list-style: none; margin: 0; padding: 0; } #navclam ul li { margin: 0; border-top: 1px none #333; } #navclam ul li a { display: block; background-color: #ccc; border-top: 1px none #333; border-right: 1px solid #333; border-bottom: thin dotted #333; border-left: 5px solid #333; text-decoration: none; padding: 5px 2px 5px 0.5em; } #navclam a:link { color: #900; } #navclam a:visited { color: #900; } #navclam a:hover { color: #fff; background-color: #900; border-top: 1px outset #333; border-right: 1px outset #333; border-bottom: 1px outset #333; border-left: 5px outset #333; } #navclam a:active { color: #fff; background-color: #900; border-top: 1px inset #333; border-right: 1px inset #333; border-bottom: 1px inset #333; border-left: 5px inset #333; } #navclam ul ul { list-style: none; } #navclam ul ul a { padding-left: 1.5em; font-size: 90%; font-weight: normal; } #navclam ul.collapse { display: none; }

- Markup
- Style
- Screenshot

     <nav id="navclam">
       <ul>
         <li>
           <a href="http://big12sports.collegesports.com/">Big XII       </a>
           <ul>
             <li>
               <a href="http://www.baylor.edu/">Baylor           </a>
             </li>
             <li>
               <a href="http://www.iastate.edu/">Iowa State           </a>
             </li>
             <li>
               <a href="http://www.ku.edu/">Kansas           </a>
             </li>
             <li>
               <a href="http://www.ksu.edu/">Kansas State           </a>
             </li>
             <li>
               <a href="http://www.ou.edu/">Oklahoma           </a>
             </li>
             <li>
               <a href="http://www.okstate.edu/">Oklahoma State           </a>
             </li>
             <li>
               <a href="http://www.tcu.edu/">Texas Christian           </a>
             </li>
             <li>
               <a href="http://www.utexas.edu/">Texas           </a>
             </li>
             <li>
               <a href="http://www.ttu.edu/">Texas Tech           </a>
             </li>
             <li>
               <a href="http://www.wvu.edu/">West Virginia           </a>
             </li>       </ul>
         </li>
         <li>
           <a href="http://www.ivyleaguesports.com/">Ivy League       </a>
           <ul class="collapse">
             <li>
               <a href="http://www.brown.edu/">Brown           </a>
             </li>
             <li>
               <a href="http://www.columbia.edu/">Columbia           </a>
             </li>
             <li>
               <a href="http://www.cornell.edu/">Cornell           </a>
             </li>
             <li>
               <a href="http://www.dartmouth.edu/">Dartmouth           </a>
             </li>
             <li>
               <a href="http://www.harvard.edu/">Harvard           </a>
             </li>
             <li>
               <a href="http://www.upenn.edu/">Penn           </a>
             </li>
             <li>
               <a href="http://www.princeton.edu/">Princeton           </a>
             </li>
             <li>
               <a href="http://www.yale.edu/">Yale           </a>
             </li>       </ul>
         </li>
         <li>
           <a href="http://www.pac-12.com/">Pac 12       </a>
           <ul class="collapse">
             <li>
               <a href="http://www.arizona.edu/">Arizona           </a>
             </li>
             <li>
               <a href="http://www.asu.edu/">Arizona State           </a>
             </li>
             <li>
               <a href="http://www.berkeley.edu/">California           </a>
             </li>
             <li>
               <a href="http://www.cu.edu/">Colorado           </a>
             </li>
             <li>
               <a href="http://www.uoregon.edu/">Oregon           </a>
             </li>
             <li>
               <a href="http://www.oregonstate.edu/">Oregon State           </a>
             </li>
             <li>
               <a href="http://www.stanford.edu/">Stanford           </a>
             </li>
             <li>
               <a href="http://www.ucla.edu/">UCLA           </a>
             </li>
             <li>
               <a href="http://www.usc.edu/">USC           </a>
             </li>
             <li>
               <a href="http://www.utah.edu/">Utah           </a>
             </li>
             <li>
               <a href="http://www.washington.edu/">Washington           </a>
             </li>
             <li>
               <a href="http://www.wsu.edu/">Washington State           </a>
             </li>       </ul>
         </li>   </ul> </nav>

In `head` element:

    <link rel="stylesheet" href="example3.css"/>

In example3.css

    #navclam {
        font-family: Arial, Verdana, Helvetica, sans-serif;
        font-weight: bold;
        font-size: 1.2em;
        width: 10em;
        border-right: 1px solid #333;
        margin-bottom: 1em;
        background-color: #ddd;
        color: #900;
      }
      #navclam ul {
        list-style: none;
        margin: 0;
        padding: 0;
      }
      #navclam ul li {
        margin: 0;
        border-top: 1px none #333;
      }
      #navclam ul li a {
        display: block;
        background-color: #ccc;
        border-top: 1px none #333;
        border-right: 1px solid #333;
        border-bottom: thin dotted #333;
        border-left: 5px solid #333;
        text-decoration: none;
        padding: 5px 2px 5px 0.5em;
      }
      #navclam a:link {
        color: #900;
      }
      #navclam a:visited {
        color: #900;
      }
      #navclam a:hover {
        color: #fff;
        background-color: #900;
        border-top: 1px outset #333;
        border-right: 1px outset #333;
        border-bottom: 1px outset #333;
        border-left: 5px outset #333;
      }
      #navclam a:active {
        color: #fff;
        background-color: #900;
        border-top: 1px inset #333;
        border-right: 1px inset #333;
        border-bottom: 1px inset #333;
        border-left: 5px inset #333;
      }
      #navclam ul ul {
        list-style: none;
      }
      #navclam ul ul a {
        padding-left: 1.5em;
        font-size: 90%;
        font-weight: normal;
      }
      #navclam ul.collapse {
        display: none;
      }

Default styling of nested list: