/* Home page — single scroll-to-top / scroll-to-bottom control */

.scroll-page-nav__btn {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right, 0px));
  bottom: max(1.25rem, env(safe-area-inset-bottom, 0px));
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(91, 33, 255, 0.22);
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.94);
  color: #5b21ff;
  box-shadow:
    0 8px 24px rgba(91, 33, 255, 0.14),
    0 2px 8px rgba(15, 17, 23, 0.06);
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease,
    visibility 0.25s ease,
    background-color 0.2s ease;
}

.scroll-page-nav__btn.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: scale(0.9) translateY(6px);
}

.scroll-page-nav__btn:hover:not(.is-hidden) {
  background: rgba(91, 33, 255, 0.1);
}

.scroll-page-nav__btn:active:not(.is-hidden) {
  transform: scale(0.94);
}

.scroll-page-nav__btn svg {
  width: 1.25rem;
  height: 1.25rem;
  stroke-width: 2.25;
}

@media (max-width: 767px) {
  .scroll-page-nav__btn {
    width: 2.5rem;
    height: 2.5rem;
    right: max(0.75rem, env(safe-area-inset-right, 0px));
    bottom: max(1rem, env(safe-area-inset-bottom, 0px));
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-page-nav__btn {
    transition: none;
  }
}