/* Loader overlay */
.preloader-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--loader-overlay-bg);
  z-index: var(--loader-overlay-z);
}

.preloader-overlay.is-visible {
  display: block;
}

.loader-container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

/* HTML: <div class="loader"></div> */
.loader {
  width: 106px;
  height: 106px;
  border-radius: 50%;
  display: inline-block;
  position: relative;
  border: var(--loader-ring-border-width) solid;
  border-color: var(--loader-ring-primary) var(--loader-ring-secondary) transparent transparent;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

.loader::after,
.loader::before {
  content: '';
  box-sizing: border-box;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  margin: auto;
  border: var(--loader-ring-border-width) solid;
  border-color: transparent var(--loader-ring-accent) transparent var(--loader-ring-primary);
  width: 90px;
  height: 90px;
  border-radius: 50%;
  animation: rotationBack .5s linear infinite;
  transform-origin: center center;
}

.loader::before {
  width: 74px;
  height: 74px;
  border-color: var(--loader-ring-primary) var(--loader-ring-secondary) transparent transparent;
  animation: rotation 1.5s linear infinite;
}

@keyframes rotation {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes rotationBack {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(-360deg); }
}