CSS3 Simple Horizontal menu Search box

While learning I wanted to create a horizontal menu. This fiddle contains the code for the same.

by Avdhut Sonpethkar

HTML

<div id="menucontainer">
    <ul id="hmenu">
        <li class="submenu"><a href="#">Home</a>

        </li>
        <li class="submenu"><a href="#">About</a>

        </li>
        <li class="submenu"><a href="#">Contact Us</a>

        </li>
        <li class="submenu"><a href="#">Information</a>
            

        </li>
        
    <li class="search"><span>Search</span><span><input type="text" /></span>
            

        </li>
    </ul>
    
   
</div>

CSS

/*
Techonolgy Quest;

creating a horizontal menu is simple.

Following id will define the dimensions for the menu, margin, padding width, height.
*/

#menucontainer {
    margin: 0px;
    padding: 0px;
    width: 100%;
    height: 100px;
}

#menucontainer ul {
    margin: 0px;
    padding: 0px;
}
/* Following selectors will define the color and the border radius for the menu*/
#menucontainer ul {
    list-style: none;
background-color:#69A9B1  ;    
    /*Using the border-radius property from css3 to get rounded corners for the menu */

}
/* Following selector will define the style for individual menu or li tags. The following style gives them a look when the menus are not selected.
note that the position proerty is set to relative and dispaly is inline.
*/
#menucontainer ul li.submenu {
    list-style: none;
    margin: 0px;
    padding: 0px;
    background-color:#69A9B1;
    position: relative;
    display: inline;
    width: auto;
    height: 100%;
    border-right: 2px solid #6A91A8;
}
/* Style for the anchor tag defined in the menu. 
*/
#menucontainer ul li.submenu a {
    
    margin-left: 10px;
    padding-left: 10px;
    margin-right: 10px;
    padding-right: 10px;
    background-color:transparent;
    position: relative;
    display: inline;
    text-decoration: none;
    font-family:"Times New Roman", "Arabic";
    font-size: 20px;
    color: #E3E3C0;
}
/* The hover effect is defined using the below selectors
For the background-color the function rgba is used to create a semi-transperant look as a hover effect
*/

#menucontainer ul li.submenu:hover {
    list-style: none;
    margin: 0px;
    padding: 0px;
    opacity: 0.5;
    background-color:#69A9B1  ;
    position: relative;
    display: inline;
border-right: 2px solid #6A91A8;
}
#menucontainer ul li.submenu:hover a {
    list-style: none;
    margin-left: 10px;
    padding-left: 10px;
    margin-right: 10px;
    padding-right: 10px;
    background-color:transparent;
    position: relative;
   ...