/* Back to top button */
#back_top {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--theme-primary);
  color: #FFF;
  width: 42px;
  height: 42px;
  padding: 10px;
  text-align: center;
  border-radius: 0;
  position: fixed;
  bottom: 15px;
  right: 15px;
  cursor: pointer;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  border-radius: 15px;
  transition: background-color 0.3s ease, opacity 0.5s ease, visibility 0.5s ease;
}

#back_top:hover {
  background-color: var(--theme-primary);
}

#back_top svg {
  fill: #fff;
  width: 24px;
}

#back_top.show {
  opacity: 1;
  visibility: visible;
}