#scrollTopBtn {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 50px;
  height: 50px;
  background-color: var(--bir);
  color: var(--text);
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease, background-color 0.3s ease, color 0.3s ease;
}

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

#scrollTopBtn:hover {
  background-color: var(--hover);
  color: var(--text-hover);
  box-shadow: var(--golge);
}

#scrollTopBtn i {
  display: inline-block; /* dönüş için şart */
  transform: rotate(90deg); /* sağa 90 derece döndür */
}