ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: black;
}

li img{
	height: 20px;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding : 20px;
    text-decoration: none;
}

li a:hover{
    background-color: white;
    color: black;
}

li {
    float: left;
}

.body{
	padding: 20px;
	margin: 18px;
}

.gallery {
    margin: 50px;
    border: 1px solid #ccc;
    float: left;
    width: 23%;
    color: red;
    font-size: 15px; 
    text-align: center;
}

.gallery:hover {
    border: 1px solid #777;
}

.gallery img {
    width: 100%;
    height: 200px;

}
.footer {
    clear: both;
    position: relative;
    z-index: 10;
    height: 3em;
    margin-top: -3em;
    color: white;
    padding: 70px;
    background-color: black;
}