/*==============================
   SCROLL UP/DOWN HELPER
==============================*/

.scroll-nav {
  position: fixed;
  left: 20px;
  bottom: 24px;
  z-index: 9000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: 0.35s;
}

.scroll-nav.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-nav-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--primary);
  color: var(--secondary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.35);
  transition: 0.3s;
}

.scroll-nav-btn:hover {
  background: var(--secondary);
  color: var(--primary);
  transform: translateY(-3px);
}

.scroll-nav-btn.disabled {
  opacity: 0.35;
  pointer-events: none;
  transform: none;
}

@media (max-width: 640px) {
  .scroll-nav {
    left: 14px;
    bottom: 18px;
    gap: 8px;
  }

  .scroll-nav-btn {
    width: 38px;
    height: 38px;
    font-size: 14px;
  }
}