header
{
	position: relative;
	top: 165px;
	width: 1000px;
	display: block;
	margin: 0 auto;
	z-index: 10;
	background-color: #fff;
	border-bottom: 1px solid;
}

#installation-heading
{
	text-align: center;
	font-style: normal;
	font-size: 1.4rem;
	font-weight: normal;
	margin-top: 0;
}

#main
{
    position: relative;
    width: 1200px;
    margin: 40px auto 210px;
}

#slideshow
{
	margin: 0 auto;
	width: 800px;
}

.mySlides
{
    margin: auto;
}

.mySlides img
{
    display: block;
    margin: auto;
}

.myCaption
{
    font-size: 0.7rem;
    margin-top: 0.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

 #nn 
    {
        left:50%;
        width:890px;
        margin-left: -474px;
}