#loading-bg {
  display: inline-block;
  margin: 20px;
}
.loading-logo {
  width: 100vw;
  height: 100vh;
  vertical-align: middle;
  text-align: center;
  display: table-cell;
}
.loading-logo img {
  max-width: 100%;
  max-height: 100%;
  display: block;
  margin: 0 auto;
}

.loading-logo .loading {
  width: 50px;
  height: 50px;
  display: block;
  margin: 0 auto;
}

.loading .effect-1,
.loading .effect-2 {
  width: 50px;
  height: 50px;
  position: fixed;
  border: 3px solid transparent;
  border-left: 3px solid #2b3439;
  border-radius: 50%;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

.loading .effect-1 {
  animation: rotate 1s ease infinite;
}
.loading .effect-2 {
  animation: rotateOpacity 1s ease infinite 0.1s;
}
.loading .effect-3 {
  width: 50px;
  height: 50px;
  position: fixed;
  border: 3px solid transparent;
  border-left: 3px solid #2b3439;
  -webkit-animation: rotateOpacity 1s ease infinite 0.2s;
  animation: rotateOpacity 1s ease infinite 0.2s;
  border-radius: 50%;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

.loading .effects {
  transition: all 0.3s ease;
}

@keyframes rotate {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
  }
  100% {
    -webkit-transform: rotate(1turn);
    transform: rotate(1turn);
  }
}
@keyframes rotateOpacity {
  0% {
    -webkit-transform: rotate(0deg);
    transform: rotate(0deg);
    opacity: 0.1;
  }
  100% {
    -webkit-transform: rotate(1turn);
    transform: rotate(1turn);
    opacity: 1;
  }
}