nav {
    margin: 0 0 0 0;
    font-family: Arial;
    font-size: 100%;
    width: 100%;
    overflow: hidden;
 }

nav ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #4d955c;
}

nav li {
  float: left;
}

nav li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

nav li a:hover {
  background-color: #3d7849;
  color: white;
  text-decoration: none;
}
*{
    margin: 0;
    padding: 0;
    line-height: 1;
}