.spinner-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.3s ease-in-out;
  z-index: 1000000;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 5;
  }
}

.spinner-logo-image {
  width: 120px;
  /* fixed size (try px first) */
  height: auto;
  object-fit: "contain";
}

/* HTML: <div class="loader"></div> */
.loader {
  --s: 28px;
  height: var(--s);
  aspect-ratio: 2.5;
  --_g: #ffffff 90%, #ffffff00;
  --_g0: no-repeat radial-gradient(farthest-side, var(--_g));
  --_g1: no-repeat radial-gradient(farthest-side at top, var(--_g));
  --_g2: no-repeat radial-gradient(farthest-side at bottom, var(--_g));
  background: var(--_g0), var(--_g1), var(--_g2), var(--_g0), var(--_g1), var(--_g2);
  background-size: 20% 50%, 20% 25%, 20% 25%;
  animation: l45 1s infinite;
}

@keyframes l45 {
  0% {
    background-position: calc(0*100%/3) 50%, calc(1*100%/3) calc(50% + calc(var(--s)/8)), calc(1*100%/3) calc(50% - calc(var(--s)/8)), calc(3*100%/3) 50%, calc(2*100%/3) calc(50% + calc(var(--s)/8)), calc(2*100%/3) calc(50% - calc(var(--s)/8))
  }

  33% {
    background-position: calc(0*100%/3) 50%, calc(1*100%/3) 100%, calc(1*100%/3) 0, calc(3*100%/3) 50%, calc(2*100%/3) 100%, calc(2*100%/3) 0
  }

  66% {
    background-position: calc(1*100%/3) 50%, calc(0*100%/3) 100%, calc(0*100%/3) 0, calc(2*100%/3) 50%, calc(3*100%/3) 100%, calc(3*100%/3) 0
  }

  90%,
  100% {
    background-position: calc(1*100%/3) 50%, calc(0*100%/3) calc(50% + calc(var(--s)/8)), calc(0*100%/3) calc(50% - calc(var(--s)/8)), calc(2*100%/3) 50%, calc(3*100%/3) calc(50% + calc(var(--s)/8)), calc(3*100%/3) calc(50% - calc(var(--s)/8))
  }
}

.loader-logo {
  width: 50%;
  /* logo size inside spinner */
  height: auto;
  position: absolute;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }

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