/* ベースの本体 */
#loading {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100vw;
    height: 100vh;
    background-color: #000;
    transition: all 1s;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 9999;
    opacity:0.75;
  }
  #loading.loaded {
    opacity: 0;
    visibility: hidden;
  }
  
  /* 以下にローディングアニメーションCSSのコピペ */
  
  /* sample loader */
  .loader,
  .loader:after {
    border-radius: 50%;
    width: 10em;
    height: 10em;
  }
  .loader {
    margin: 60px auto;
    font-size: 10px;
    position: relative;
    text-indent: -9999em;
    border-top: 1.1em solid rgba(255, 255, 255, 0.2);
    border-right: 1.1em solid rgba(255, 255, 255, 0.2);
    border-bottom: 1.1em solid rgba(255, 255, 255, 0.2);
    border-left: 1.1em solid #ffffff;
    -webkit-transform: translateZ(0);
    -ms-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-animation: load8 1.1s infinite linear;
    animation: load8 1.1s infinite linear;
  }
  @-webkit-keyframes load8 {
    0% {
      -webkit-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }
  @keyframes load8 {
    0% {
      -webkit-transform: rotate(0deg);
      transform: rotate(0deg);
    }
    100% {
      -webkit-transform: rotate(360deg);
      transform: rotate(360deg);
    }
  }