/* ── Scroll to top/bottom floating buttons (site-wide) ── */
.scroll-fab {
  position: fixed;
  inset-block-end: 100px;
  inset-inline-end: 24px;
  z-index: 1400;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scroll-fab__btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--ahk-dark-blue, #003882);
  color: #fff;
  font-size: 1.1rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 56, 130, .3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .2s, transform .2s, background .2s;
}

.scroll-fab__btn.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.scroll-fab__btn:hover {
  background: var(--ahk-blue, #00A6E3);
}

@media (max-width: 600px) {
  .scroll-fab {
    inset-inline-end: 14px;
    inset-block-end: 14px;
  }
  .scroll-fab__btn {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}