body {
  background-color: var(--main-color);
}

.center {
  position: absolute;
  margin: auto;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.loader {
  width: 200px;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
  margin-top: 32px;
  margin-left: auto;
  margin-right: auto;
  transform-origin: center center;
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
}

.loader::after {
  content: '';
  position: absolute;
  top: 0;
  left: -40%;
  width: 40%;
  height: 100%;
  background: #fff;
  animation: progress 1.5s infinite ease-in-out;
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
}

@keyframes progress {
  0% {
    transform: translateX(0);
    left: -40%;
  }
  100% {
    transform: translateX(250%);
    left: -40%;
  }
}

.vertical-center {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--main-color);
}