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);
}

@property --angle {
  syntax: "<angle>";
  inherits: false;
  initial-value: 0deg;
}
.band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.band__text {
  margin: 0;
  color: #17141a;
  font-weight: 700;
  font-size: clamp(16px, 5vmin, 22px);
  line-height: 1.35;
}

.band__cta-wrap {
  position: relative;
  padding: 4px;
  border-radius: 999px;
}

.band__ring {
  position: absolute;
  inset: 0;
  border-radius: 999px;
  background: conic-gradient(from var(--angle), #17141a, transparent 32%, #17141a);
  animation: spin 2s linear infinite;
}

.band__cta {
  position: relative;
  border: 0;
  border-radius: calc(999px - 4px);
  padding: 12px 32px;
  font-family: inherit;
  font-weight: 600;
  font-size: 13px;
  line-height: 1;
  color: #ffd23f;
  background: #17141a;
  cursor: pointer;
}

@keyframes spin {
  to {
    --angle: 360deg;
  }
}
@media (max-width: 340px) {
  .band__cta {
    padding: 8px 24px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .band__ring {
    animation: none;
  }
}