/* ====================================================
   BACK TO TOP BUTTON - Updated with Scroll Behavior
   ==================================================== */

#back-to-top {
  position: fixed !important;
  bottom: 20px !important;
  right: 20px !important;
  width: 56px !important;
  height: 56px !important;
  background: var(--accent-color, #00aaff) !important;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(100px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1003 !important;
  display: flex;
  align-items: center;
  justify-content: center;
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  background: linear-gradient(135deg, var(--accent-color), #0088cc) !important;
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 170, 255, 0.4);
}

#back-to-top:active {
  transform: translateY(-3px) scale(0.98);
}

#back-to-top:focus-visible {
  outline: 3px solid var(--accent-color);
  outline-offset: 4px;
}

/* Responsive */
@media (max-width: 768px) {
  #back-to-top {
    bottom: 15px !important;
    right: 15px !important;
    width: 50px !important;
    height: 50px !important;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  #back-to-top {
    width: 46px !important;
    height: 46px !important;
    font-size: 0.9rem;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  #back-to-top {
    transition:
      opacity 0.2s ease,
      visibility 0.2s ease !important;
  }

  #back-to-top:hover {
    transform: none !important;
  }
}