html {
  display: flex;
}

body {
  flex: 1;
}

html, body {
  min-height: 100%;
}

.up-loader {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.up-loader .up-loader-logo {
  width: 40%;
  height: 40%;
}

.up-loader .double-ring {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  height: 100%;
  width: 100%;
}

.up-loader .ring {
  transform-origin: center center;
}

.up-loader .ring.front {
  animation: rotate 2s linear infinite;
}

.up-loader .ring.back {
  animation: rotate-back 2s linear infinite;
}

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

@keyframes rotate-back {
  100% {
    transform: rotate(-360deg);
  }
}