body #site-header {
       background-image: url(http://paulmossmanpottery.co.uk/wp-content/uploads/2016/11/plates-lsuper-narrow-crop.jpg); 
       background-position: center center; 
       background-repeat: no-repeat; 
       background-size: cover; 
    } 

#site-navigation-wrap {
       background-color: rgba(205,188,119,1); 
    } 

#site-navigation-wrap ul {
       background-color: rgba(205,188,119,1); 
    } 


@media screen and (max-width: 480px)  { body #site-header {   background-size: auto; }  }