body {
  background-color: black;
  color: white;
  font-family: Verdana;
}

#nav-bar ul > li {
  display: inline-block;
  margin: 0 5px 0 5px;
}

#nav-bar ul > li > a {
 color: red;
 text-decoration: none;
}

#nav-bar ul > li > a:hover {
    color: yellow;
}

.pic-grid {
  align-items: center;
}

.pic-grid a > img {
 width: 40%;
 height: 25%;
 margin: 3%;
}