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

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

.feat-c {
  margin: 0;
  list-style: none;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: clamp(240px, 80vw, 360px);
  padding: 20px;
  border-radius: 16px;
  background: #17141a;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.feat-c__row {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.feat-c__icon {
  flex: none;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: radial-gradient(circle at 30% 30%, #ffffff, #2f6df6 40%, #17141a 82%);
  background-size: 280% 280%;
  animation: ballShine 2s steps(8, jump-none) infinite;
}

.feat-c__text {
  margin: 0;
  color: #ffffff;
  font-weight: 600;
  font-size: clamp(11.5px, 2.8vw, 13px);
  line-height: 1.4;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

@keyframes ballShine {
  0% {
    background-position: 0% 0%;
  }
  100% {
    background-position: 180% 180%;
  }
}
@media (prefers-reduced-motion: reduce) {
  .feat-c__icon {
    animation: none;
  }
}