#site-name a {
  display: block;
  margin: auto;
  color: red;
  background: url("/custom/img/mojavewifi_favicon.png") no-repeat 50%/60%;
}

.no-auth #site-name a {
  margin-left: 2.5rem;
  width: 150px;
  height: 150px;
  background: url("/custom/img/mojavewifi_favicon.png") no-repeat
    scroll 0 100%/100%;
    display: block;
}




/* Optional: hide header text if you want pure graphic */
/*
.ow-navbar .ow-header-title { display: none; }
*/