/* Make header logo fill the full header width (responsive) */
.pkp_structure_head .pkp_head_wrapper
  .pkp_site_name_wrapper
  .pkp_site_name
  .is_img {
  display: block;
  width: 100%;
  text-align: center;
}
.pkp_structure_head .pkp_head_wrapper
  .pkp_site_name_wrapper
  .pkp_site_name
  .is_img > img {
  display: block;
  width: 100% !important;
  height: auto !important;
  max-width: 100%;
}