#loading {
  width: 100vw;
  height: 100vh;
  transition-duration: 2s;
  transition-delay:1s;
  background-color: #1360a2;


 
/* 以下のコードを追加 */
  position: fixed;
  top: 0;
  left: 0;
  z-index: 500000;
}


.loaded {
  opacity: 0;
  visibility: hidden;
}
.spinner {
  width: 100px;
  height: 100px;
  margin: 40vh auto;
  background-color: #fff;
  border-radius: 100%;
  animation: sk-scaleout 2.0s infinite ease-in-out;

}