#site-header {
  position   : fixed !important;
  top        : 0  !important;
  left       : 0;
  right      : 0;
  box-shadow : 0 2px 16px rgba(40,32,26,0.25);
  transform  : unset;      /* reset falls irgendwo translateY gesetzt */
}


main > section:nth-of-type(odd) {
  background: #f7f1e7;
}

main > section:nth-of-type(even) {
  background: #fffaf2;
}