#progress .sk-circle {
  position: relative;
  margin: 0 auto; /* 上下マージン - 可変 */
  width: 50px; /* サイズ - 可変 */
  height: 50px; /* サイズ - 可変 */
}
#progress .sk-circle .sk-child {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
#progress .sk-circle .sk-child:before {
  display: block;
  margin: 0 auto;
  width: 15%;
  height: 15%;
  border-radius: 100%;
  background-color: var(--loading_color_bar1); /* ベースの色 - 可変 */
  content: "";
  animation: sk-circleBounceDelay 1.2s infinite ease-in-out both;
}
#progress .sk-circle .sk-circle2 {
  transform: rotate(30deg);
}
#progress .sk-circle .sk-circle3 {
  transform: rotate(60deg);
}
#progress .sk-circle .sk-circle4 {
  transform: rotate(90deg);
}
#progress .sk-circle .sk-circle5 {
  transform: rotate(120deg);
}
#progress .sk-circle .sk-circle6 {
  transform: rotate(150deg);
}
#progress .sk-circle .sk-circle7 {
  transform: rotate(180deg);
}
#progress .sk-circle .sk-circle8 {
  transform: rotate(210deg);
}
#progress .sk-circle .sk-circle9 {
  transform: rotate(240deg);
}
#progress .sk-circle .sk-circle10 {
  transform: rotate(270deg);
}
#progress .sk-circle .sk-circle11 {
  transform: rotate(300deg);
}
#progress .sk-circle .sk-circle12 {
  transform: rotate(330deg);
}
#progress .sk-circle .sk-circle2:before {
  animation-delay: -1.1s;
}
#progress .sk-circle .sk-circle3:before {
  animation-delay: -1s;
}
#progress .sk-circle .sk-circle4:before {
  animation-delay: -0.9s;
}
#progress .sk-circle .sk-circle5:before {
  animation-delay: -0.8s;
}
#progress .sk-circle .sk-circle6:before {
  animation-delay: -0.7s;
}
#progress .sk-circle .sk-circle7:before {
  animation-delay: -0.6s;
}
#progress .sk-circle .sk-circle8:before {
  animation-delay: -0.5s;
}
#progress .sk-circle .sk-circle9:before {
  animation-delay: -0.4s;
}
#progress .sk-circle .sk-circle10:before {
  animation-delay: -0.3s;
}
#progress .sk-circle .sk-circle11:before {
  animation-delay: -0.2s;
}
#progress .sk-circle .sk-circle12:before {
  animation-delay: -0.1s;
}
@keyframes sk-circleBounceDelay {
  0%,
  80%,
  100% {
    transform: scale(0);
  } 40% {
    transform: scale(1);
  }
}