header .back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid #153e34;
  border-radius: 0;
  background: #153e34;
  color: #fff;
  font-size: 13px;
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: 0;
  text-decoration: none;
  white-space: nowrap;
}
header .back span { font-size: 20px; line-height: 1; }
header .back:hover { background: #245447; }
header .back:focus-visible { outline: 3px solid #a28d58; outline-offset: 3px; }
@media (max-width: 600px) {
  header { flex-wrap: wrap; }
  header .back { display: inline-flex; margin-left: auto; padding: 8px 12px; }
}