.col-1, .col-2, .col-3, .col-4{ float:left}
/*======= width =======*/
.main{margin:0 auto; text-align:left; width:936px; }

/*======= header =======*/
#header {height:423px;}

/*======= index.html =======*/
#page1 #content .col-1{ width:229px; margin-right:49px}
#page1 #content .col-2{ width:548px}
#page1 #content .col-3{ width:268px; margin-right:12px}
#page1 #content .col-4{ width:268px}
/*======= index-2.html =======*/
#page3 #content .col-1{ width:585px; margin-right:40px}
#page3 #content .col-2{ width:217px}
/*======= index-3.html =======*/
#page4 #content .col-1{ width:229px; margin-right:49px}
#page4 #content .col-2{ width:548px}
#page4 #content .col-3{ width:268px; margin-right:12px}
#page4 #content .col-4{ width:268px}
/*======= index-4.html =======*/
#page5 #content .col-1{ width:229px; margin-right:49px}
#page5 #content .col-2{ width:548px}
#page5 #content .col-3{ width:268px; margin-right:12px}
#page5 #content .col-4{ width:268px}

/*======= footer =======*/
#footer { height:90px; }

.thumbnail{
position: relative;
z-index: 0;
}

.thumbnail:hover{
background-color: transparent;
z-index: 50;
}

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: lightyellow;
padding: 5px;
left: -1000px;
border: 1px dashed gray;
visibility: hidden;
color: black;
text-decoration: none;
}

.thumbnail span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}

.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: 0;
left: -60px; /*position where enlarged image should offset horizontally */

}