.main-nav {
  width: 100%;
  background: #900;
  height: 20px;
  text-align: center;
}
.main-nav ul {
  width: 610px;
  list-style: none;
  margin: 0 auto;
  padding: 0px;
}
.main-nav li {
  display: inline;
  padding: 0;
}
.main-nav li a {
  display: block;
  float: left;
  margin-right: 0px;
  padding: 3px 10px 2px 10px;
  color: #fff;
  font-size: 12px;
  font-weight: bold;
  text-decoration: none;
  border-right: 1px solid #fff;
}
.main-nav li.first a {
  border-left: 1px solid #fff;
}
.main-nav li a:hover {
  background-color: #600;
  color: #ffffff;
}