#preloader.hidden {
  display: none;
}

#preloader {
  width: 100vw;
  height: 100vh;
  background: #FFF3B0;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 10000000;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.loader {
  width: 90px;
  height: 90px;
  border: 2px solid red;
  border-radius: 50%;
  display: inline-block;
  position: relative;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}
.loader::after {
  content: '';  
  box-sizing: border-box;
  position: absolute;
  left: 0;
  top: 0;
  background: #D70601;
  width: 16px;
  height: 16px;
  transform: translate(-50%, 50%);
  border-radius: 50%;
}
    
@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}