body {
  margin: 0;
}

.preloader {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #e0e0e0;
  z-index: 1001;
  display: flex;
  justify-content: center;
  align-items: center;
}

.preloader__row {
  position: relative;
  width: 70px;
  height: 70px;
  animation: preloader-rotate 2s infinite linear;
}

.preloader__item {
  position: absolute;
  display: inline-block;
  top: 0;
  background-color: #337ab7;
  border-radius: 50%;
  width: 35px;
  height: 35px;
  animation: preloader-bounce 2s infinite ease-in-out;
}

.preloader__item:last-child {
  top: auto;
  bottom: 0;
  animation-delay: -1s;
}

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

@keyframes preloader-bounce {
  0%, 100% {
    transform: scale(0);
  }
  50% {
    transform: scale(1);
  }
}

.loaded_hiding .preloader {
  opacity: 0;
  transition: opacity 0.3s ease-out;
}

.loaded .preloader {
  display: none;
}