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);
}

.badge {
  position: relative;
  overflow: hidden;
  display: inline-block;
  padding: 8px 20px;
  border-radius: 999px;
  background: color-mix(in srgb, #17141a 30%, #ff4d1f);
  color: #fff7e6;
  font-weight: 700;
  font-size: clamp(16px, 4.6vw, 22px);
  line-height: 1;
  font-family: inherit;
}
.badge::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, #fff7e6 48%, transparent 66%);
  background-size: 250% 100%;
  mix-blend-mode: overlay;
  animation: sweep 2s linear infinite, sweep-thick 2s linear infinite;
}

@keyframes sweep {
  0% {
    background-position: 150% 0;
  }
  100% {
    background-position: -150% 0;
  }
}
@keyframes sweep-thick {
  0% {
    inset: 0 -1px;
  }
  14% {
    inset: 1px 0;
  }
  28% {
    inset: -1px 1px;
  }
  42% {
    inset: 0.5px -0.5px;
  }
  57% {
    inset: -0.5px 1px;
  }
  71% {
    inset: 1px 0.5px;
  }
  85% {
    inset: -1px -0.5px;
  }
  100% {
    inset: 0 -1px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .badge::after {
    animation: none;
    opacity: 0;
  }
}