body {
	margin:0;
}
.wrap{
	width: auto;
  text-align: center;<br>
  font-family: Gotham, "Helvetica Neue", Helvetica, Arial, sans-serif;
	padding: 10px;
}
a:hover {
  background-color: yellow;
}
.gallery1 {<br>
background-color: #CCC;<br>    /* light grey */
max-width:710px;<br>
padding:10px;<br>
text-align: center;<br>
margin:auto;<br>
}
<br>
.gallery1 img {<br>
margin: 10px;<br>
}