Write - HOW-To: Convert PSD to HTML/CSS - page 57

Either way, they would both work.
Sometimes a “ cl ” is better, sometimes it's “ cf ”. It
depends on what you need to get done for the task.
Move on to the menu styling needed for the #header.
Here's how the CSS should look like:
#menu {
line-height:0; /* remove unwanted space caused by a children with clearfix */
}
#menu ul {
padding:13px 0; /* create space between the top and bottom edges of links */
}
#menu ul li {
font:normal 20px/25px “Marvel”, Arial, sans-serif; /* set the custom font */
text-transform:uppercase; /* uppercase all text from CSS */
margin:0 30px 0 0; /* create space between the right and left edges of links */
}
#menu ul li a {
text-decoration:none; /* disable the underline style */
color:#b9b9b9; /* change the color of each anchor */
}
#menu ul li.active a,
#menu ul li a:hover {
text-decoration:underline; /* enable the underline style */
color:#FFF; /* change the color differently */
}