html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.spinner {
  position: relative;
  width: clamp(56px, 16vw, 84px);
  height: clamp(56px, 16vw, 84px);
}

.spinner__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 5px solid transparent;
}

.spinner__ring--outer {
  border-top-color: #17141a;
  border-bottom-color: #17141a;
  animation: spin 1.2s linear infinite;
}

.spinner__ring--inner {
  inset: 13px;
  border-left-color: #2f6df6;
  border-right-color: #2f6df6;
  animation: spin-rev 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@keyframes spin-rev {
  to {
    transform: rotate(-360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .spinner__ring--outer, .spinner__ring--inner {
    animation: none;
  }
}