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);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: 12px;
  padding: 14px 26px;
  background: rgba(255, 255, 255, 0.14);
  color: #17141a;
  font-weight: 700;
  font-size: clamp(15px, 4vw, 18px);
  line-height: 1;
  font-family: inherit;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff7e6;
  flex: none;
}

.a-spin {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .a-spin {
    animation: none;
  }
}