You need to add the #
before your second set of #header
rules (or just combine them.
#header{
width:100%;
height:auto;
text-align:center;
margin-top:0;
}
header {
background: url(http://pintotours.net/TEMP1/NewHeader.jpg);
background-repeat: no-repeat;
background-size: cover;
background-position: center;
text-align: center;
font-family: sans-serif;
font-weight: bold;
font-size: 1.6em;
text-shadow: 1px 1px 1px #000;
padding: 5%;
}