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);
}

.stage {
  position: relative;
}

.mini-page {
  position: absolute;
  inset: 24px 48px 24px 24px;
  overflow: hidden;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
}

.mini-page__track {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  transform: translateY(-140px);
}

.mini-page__track.is-demo {
  animation: mp-scroll 2s ease-in-out infinite;
}

@keyframes mp-scroll {
  0%, 25% {
    transform: translateY(-140px);
  }
  70%, 100% {
    transform: translateY(0);
  }
}
.mini-page__line {
  display: block;
  height: 16px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.16);
}

.mini-page__line--mark {
  background: #ffd23f;
}

.totop {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: #ffd23f;
  display: grid;
  place-items: center;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
  text-decoration: none;
}

.totop__arrow {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: #17141a;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (prefers-reduced-motion: reduce) {
  .mini-page__track.is-demo {
    animation: none;
    transform: translateY(0);
  }
}