#page-header{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: #fff;
  z-index: 10000;
  border-bottom: 1px solid #ccc;
}


#content{
  padding-top: 100px;
}



#content [id] {
 scroll-margin-top: 100px; 
}


html {
 scroll-padding-top: 100px; 
}