@charset "utf-8";
/*TOPスクロール*/
#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 50px;
  height: 50px;
  background: #007BFF;
  color: #fff;
  font-size: 14px;
  font-weight: bold;
  text-align: center;
  line-height: 50px; /* 高さと同じで縦中央 */
  border-radius: 50%; /* 円形 */
  cursor: pointer;
  display: none;
  z-index: 9999;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: opacity 0.3s;
}
#back-to-top.show {
  display: block;
}