"You are here" with CSS

"You are Here" CSS Example in JSFiddle

<nav id="navigation">
  <ul id="mainnav">
    <li id="navpart1"><a href="1.shtml">The Great Binding Law, Gayanashagowa</a></li>
    <li id="navpart2"><a href="2.shtml">Rights, Duties and Qualifications of Lords</a></li>
    <li id="iamhere"><a href="3.shtml">Election of Pine Tree Chiefs</a></li>
    <li id="navpart4"><a href="4.shtml">Names, Duties and Rights of War Chiefs</a></li>
    <li id="navpart5"><a href="5.shtml">Clans and Consanguinity</a></li>
    <li id="navpart6"><a href="6.shtml">Official Symbolism</a></li>
    <li id="navpart7"><a href="7.shtml">Laws of Adoption</a></li>
    <li id="navpart8"><a href="8.shtml">Laws of Emigration</a></li>
    <li id="navpart9"><a href="9.shtml">Rights of Foreign Nations</a></li>
    <li id="navpart10"><a href="10.shtml">Rights and Powers of War</a></li>
    <li id="navpart11"><a href="11.shtml">Treason or Secession of a Nation</a></li>
    <li id="navpart12"><a href="12.shtml">Rights of the People of the Five Nations</a></li>
    <li id="navpart13"><a href="13.shtml">Religious Ceremonies Protected</a></li>
    <li id="navpart14"><a href="14.shtml">The Installation Song</a></li>
    <li id="navpart15"><a href="15.shtml">Protection of the House</a></li>
    <li id="navpart16"><a href="16.shtml">Funeral Addresses</a></li>
  </ul>
</nav>

And the CSS:

#navigation a {
  /* Rules for navigation items */
}
#navigation a:hover {
  /* Rules for navigation items */
}

/* Rules specific for "you are here" */
#navigation #iamhere a,
#navigation #iamhere a:hover {
  /* Rules for the "you are here" item */
}