/* Scroll to Top Button */
.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent-color) 0%, #4A8FA5 100%);
  color: #FFFFFF;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 4px 15px rgba(109, 180, 200, 0.4);
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(109, 180, 200, 0.6);
  background: linear-gradient(135deg, #4A8FA5 0%, var(--accent-color) 100%);
}

.scroll-to-top:active {
  transform: translateY(-2px);
}

.scroll-to-top::before {
  content: '';
  position: absolute;
  top: -3px;
  left: -3px;
  right: -3px;
  bottom: -3px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--main-color) 100%);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.scroll-to-top:hover::before {
  opacity: 0.5;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.3;
  }
}

@media (max-width: 767px) {
  .scroll-to-top {
    width: 45px;
    height: 45px;
    bottom: 20px;
    right: 20px;
    font-size: 1.3rem;
  }
}