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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.plan {
  position: relative;
  width: clamp(180px, 60vw, 220px);
  border-radius: 16px;
  background: #17141a;
  border: 2px solid #2f6df6;
  padding: 32px 24px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  animation: planBreathe 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.plan__badge {
  position: absolute;
  top: -8px;
  left: 24px;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  padding: 4px 12px;
  font: 700 clamp(9.5px, 2.4vw, 11px)/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.plan__name {
  margin: 0;
  color: #fff7e6;
  font: 700 clamp(14px, 3.6vw, 17px)/1 -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.plan__price {
  margin: 0;
  color: rgba(255, 247, 230, 0.7);
  font-weight: 600;
  font-size: clamp(11px, 2.8vw, 13px);
  line-height: 1;
}

.plan__cta {
  margin-top: 8px;
  border: 0;
  border-radius: 999px;
  background: #0a4fe8;
  color: #fff7e6;
  padding: 8px 20px;
  font-weight: 600;
  font-size: clamp(11px, 2.8vw, 13px);
  line-height: 1;
}

@keyframes planBreathe {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(47, 109, 246, 0.35), 0 14px 24px rgba(23, 20, 26, 0.32);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(47, 109, 246, 0), 0 14px 24px rgba(23, 20, 26, 0.32);
    transform: scale(1.015);
  }
}
@media (prefers-reduced-motion: reduce) {
  .plan {
    animation: none !important;
    box-shadow: 0 0 0 4px rgba(47, 109, 246, 0.2), 0 14px 24px rgba(23, 20, 26, 0.32);
    transform: none;
  }
}