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

.stage {
  min-height: 100vh;
  margin: 0;
  background: #ff4d1f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.head {
  position: sticky;
  top: 0;
  height: 56px;
  display: flex;
  align-items: center;
  padding: 0 clamp(16px, 5vw, 24px);
}
.head__layer {
  position: absolute;
  inset: 0;
}
.head__layer--dark {
  background: transparent;
  opacity: 1;
  transition: opacity 300ms ease-out;
}
.head__layer--light {
  background: #17141a;
  opacity: 0;
  transition: opacity 300ms ease-out;
}
.head.is-inverted .head__layer--dark {
  opacity: 0;
}
.head.is-inverted .head__layer--light {
  opacity: 1;
}
.head__logo {
  position: relative;
  color: #17141a;
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
  font-family: inherit;
  letter-spacing: 0.04em;
  transition: color 300ms ease-out;
}
.head.is-inverted .head__logo {
  color: #fff7e6;
}

.head.is-demo .head__layer--light {
  animation: invert-loop 2s ease-out infinite;
}

.head.is-demo .head__logo {
  animation: logo-invert 2s ease-out infinite;
}

@keyframes invert-loop {
  0%, 15% {
    opacity: 0;
  }
  45%, 70% {
    opacity: 1;
  }
  95%, 100% {
    opacity: 0;
  }
}
@keyframes logo-invert {
  0%, 15% {
    color: #17141a;
  }
  45%, 70% {
    color: #fff7e6;
  }
  95%, 100% {
    color: #17141a;
  }
}
.hero {
  position: relative;
  height: clamp(100px, 40vh, 220px);
  display: grid;
  place-items: center;
}

.hero__sentinel {
  position: absolute;
  bottom: 0;
  height: 1px;
  width: 1px;
}

.hero__title {
  color: #17141a;
  font-weight: 700;
  font-size: clamp(14px, 4vw, 18px);
  line-height: 1;
  font-family: inherit;
  margin: 0;
}

@media (prefers-reduced-motion: reduce) {
  .head__layer {
    transition: none;
  }
  .head__logo {
    transition: none;
  }
  .head.is-demo .head__layer--light {
    animation: none !important;
    opacity: 1;
  }
  .head.is-demo .head__logo {
    animation: none !important;
    color: #fff7e6;
  }
}