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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

@property --percent {
  syntax: "<number>";
  inherits: false;
  initial-value: 0;
}
.ring {
  --percent: 0;
  position: relative;
  width: clamp(64px, 18vw, 96px);
  height: clamp(64px, 18vw, 96px);
  border-radius: 50%;
  background: conic-gradient(#fff7e6 calc(var(--percent) * 1%), rgba(23, 20, 26, 0.18) 0);
  animation: fill 1.8s ease-in-out infinite;
}

.ring::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: #ff4d1f;
}

@keyframes fill {
  0% {
    --percent: 0;
  }
  50% {
    --percent: 100;
  }
  100% {
    --percent: 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .ring {
    animation: none;
    --percent: 62;
  }
}