/* Shared "Back to the Tower" link — one file, every floor. */
.ff-tower-back,
.ff-tower-back-foot a {
  display: inline-block;
  margin: 10px 14px;
  padding: 10px 16px;
  min-height: 44px;
  line-height: 24px;
  box-sizing: border-box;
  font: 600 16px/24px system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #fff;
  background: #1f2937;
  border: 1px solid #9ca3af;
  border-radius: 10px;
  text-decoration: none;
}
.ff-tower-back:hover,
.ff-tower-back-foot a:hover { background: #374151; border-color: #fff; }
.ff-tower-back:focus-visible,
.ff-tower-back-foot a:focus-visible { outline: 3px solid #fbbf24; outline-offset: 3px; }
.ff-tower-back-foot { text-align: center; padding: 16px 0 28px; background: transparent; }
@media (prefers-reduced-motion: reduce) {
  .ff-tower-back, .ff-tower-back-foot a { transition: none; }
}