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);
}

.sp-card {
  position: relative;
  width: min(240px, 78vw);
  height: 150px;
  overflow: hidden;
  border-radius: 16px;
  background: #201c26;
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  place-items: center;
}

.sp-card__spot {
  position: absolute;
  left: -90px;
  top: -90px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.9) 0%, rgba(47, 109, 246, 0.5) 45%, transparent 72%);
  mix-blend-mode: soft-light;
  transform: translate(120px, 75px);
  transition: transform 220ms ease-out;
  pointer-events: none;
}

.sp-card__text {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 16px;
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.72);
  mix-blend-mode: screen;
}

@media (hover: none), (pointer: coarse) {
  .sp-card__spot {
    opacity: 0;
  }
  .sp-card__text {
    color: rgba(255, 255, 255, 0.85);
  }
}
.sp-card.is-demo .sp-card__spot {
  animation: sp-sweep 2s ease-out infinite;
  transition: none;
}

@keyframes sp-sweep {
  0%, 6% {
    transform: translate(10px, 10px);
  }
  50% {
    transform: translate(190px, 130px);
  }
  94%, 100% {
    transform: translate(10px, 10px);
  }
}
@media (prefers-reduced-motion: reduce) {
  .sp-card__spot {
    animation: none !important;
    transition: none !important;
    transform: translate(120px, 75px);
  }
  .sp-card__text {
    color: rgba(255, 255, 255, 0.72);
  }
}