.site-header .brand-lockup,
.passage-header img,
.guide-header img {
  display: block;
  width: 260px;
  max-width: calc(100vw - 120px);
  height: auto;
}

@media (max-width: 620px) {
  .site-header .brand-lockup,
  .passage-header img,
  .guide-header img {
    width: 205px;
    max-width: calc(100vw - 80px);
  }
}