This is because you’ve added your own code for the header around line 3815 of your css file –
`#header {
position:relative;
width:100%;
height: 25px;
}`
Notice you put 25px for the height…..you need to change this to the height of your actual image…..which appears to be 170px.
Should look like this –
`#header {
position:relative;
width:100%;
height: 170px;
}`