/* TOP 버튼 */
#topBtn {
  opacity: 0;
  pointer-events: none;
  position: fixed;
  bottom: 40px;
  right: 200px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid #ddd;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  cursor: pointer;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #555;
  font-family: 'Noto Sans KR', sans-serif;
  font-weight: 600;
  gap: 2px;
  transition: opacity 0.3s ease;
}