body {
  background-color: #fff;
}

.start-loader {
  z-index: 10000;
  width: 48px;
  height: 48px;
  border: 3px solid #3a3938;
  border-radius: 50%;
  display: inline-block;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

.start-loader::after {
  content: "";
  box-sizing: border-box;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 3px solid;
  border-color: #2c2b2a transparent;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #212020;
  }

  .start-loader {
    border-color: #bdbab2;
  }

  .start-loader::after {
    border-color: #faf9f7 transparent;
  }
}

@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}