a {
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px dotted #666;
}

a:hover {
  border-bottom: 1px solid #666;
}
.res-img {
  width: 100%;
  height: auto;
}
.home-img {
  margin-top: 40px;
}
.nav {
  float: right;
}
div.nav a {
  color: #666;
  text-decoration: none;
  border-bottom: 0;
}