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);
}

.featurelist {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: clamp(4px, 2vw, 8px);
  width: clamp(220px, 74vw, 320px);
}

.featurelist__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: clamp(4px, 1.5vw, 8px) 8px;
  border-radius: 999px;
  background: #fff7e6;
  box-shadow: 6px 6px 12px rgba(23, 20, 26, 0.16), -6px -6px 12px rgba(255, 255, 255, 0.9);
  animation: chipIn 2s ease-out infinite;
}

.featurelist__item--a {
  animation-delay: 0s;
}

.featurelist__item--b {
  animation-delay: -0.5s;
}

.featurelist__item--c {
  animation-delay: -1s;
}

.featurelist__item--d {
  animation-delay: -1.5s;
}

.featurelist__chip {
  flex: none;
  width: clamp(24px, 8vw, 36px);
  height: clamp(24px, 8vw, 36px);
  border-radius: 999px;
  background: #2f6df6;
  box-shadow: inset 2px 2px 4px rgba(23, 20, 26, 0.2), inset -2px -2px 4px rgba(255, 255, 255, 0.5);
}

.featurelist__text {
  color: #17141a;
  font-weight: 600;
  font-size: clamp(12px, 2.8vw, 14px);
  line-height: 1.3;
}

@keyframes chipIn {
  0% {
    opacity: 0.5;
    transform: translateX(-6px);
  }
  25% {
    opacity: 1;
    transform: translateX(0);
  }
  75% {
    opacity: 1;
    transform: translateX(0);
  }
  100% {
    opacity: 0.5;
    transform: translateX(-6px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .featurelist__item {
    animation: none !important;
    opacity: 1;
    transform: none;
  }
}