@media only screen and (max-width: 800px) { 

  #header-logo{ top: 5px; left: 15%; z-index: 10000; position: fixed; margin:0;  }
  #header-logo img{ margin-left:0 !important; float: none !important; max-height: 28px; width: auto; }

.header {  min-height: auto; }

}