@layer components {
  .spinner {
    position: relative;

    &::before {
      --mask: no-repeat radial-gradient(#000 68%, #0000 71%);
      --dot-size: 1.25em;

      -webkit-mask: var(--mask), var(--mask), var(--mask);
      -webkit-mask-size: 28% 45%;
      animation: submitting 1.3s infinite linear;
      aspect-ratio: 8/5;
      background: currentColor;
      content: "";
      inline-size: var(--dot-size);
      inset: 50% 0.25em;
      margin-block: calc((var(--dot-size) / 3) * -1);
      margin-inline: calc((var(--dot-size) / 2) * -1);
      position: absolute;
    }
  }

  @keyframes submitting {
    0%    { -webkit-mask-position: 0% 0%,   50% 0%,   100% 0% }
    12.5% { -webkit-mask-position: 0% 50%,  50% 0%,   100% 0% }
    25%   { -webkit-mask-position: 0% 100%, 50% 50%,  100% 0% }
    37.5% { -webkit-mask-position: 0% 100%, 50% 100%, 100% 50% }
    50%   { -webkit-mask-position: 0% 100%, 50% 100%, 100% 100% }
    62.5% { -webkit-mask-position: 0% 50%,  50% 100%, 100% 100% }
    75%   { -webkit-mask-position: 0% 0%,   50% 50%,  100% 100% }
    87.5% { -webkit-mask-position: 0% 0%,   50% 0%,   100% 50% }
    100%  { -webkit-mask-position: 0% 0%,   50% 0%,   100% 0% }
  }
}