body {
  margin: 0 auto;
  padding: 2em 10em;
  font-family: 'Montserrat', sans-serif;
}

th {
  text-align: left;
}

a:visited {
  color: blue;
}

nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

nav ul li {
  background-color: #fff;
  display: block;
  float: left;
  margin-right: 10px;
  position: relative;
  text-align: center;
}

nav ul li a {
  border: 1px solid;
  line-height: 40px;
  padding: 8px 10px 8px 10px;
  text-decoration: none;
}

nav ul li a:hover {
  background: #ccc;
}

nav ul li ul {
  display: none;
  position: relative;
  top: 40px;
  z-index: 1;
}

nav ul li ul li {
  clear: both;
}

nav ul li:hover ul {
  display: block;
  position: absolute;
}

nav ul li ul li:not(:last-child) {
}

#header {
  padding-bottom: 1em;
}