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);
}

.gn {
  width: min(100%, 280px);
}

.gn__card {
  view-transition-name: gn-card;
  position: relative;
  width: 100%;
  box-sizing: border-box;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  background: #fff7e6;
  border-radius: 16px;
  padding: 12px;
  box-shadow: 0 14px 24px rgba(23, 20, 26, 0.32);
}

.gn__card:focus-visible {
  outline: 2px solid #0a4fe8;
  outline-offset: 2px;
}

.gn__thumb {
  view-transition-name: gn-thumb;
  view-transition-group: nearest;
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: #0a4fe8;
  flex: 0 0 auto;
}

.gn__title {
  view-transition-name: gn-title;
  view-transition-group: nearest;
  font: 700 14px/1.3 -apple-system, "Segoe UI", sans-serif;
  color: #17141a;
}

.gn__card.is-open {
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 20px;
}

.gn__card.is-open .gn__thumb {
  width: 100%;
  height: 96px;
  border-radius: 16px;
}

.gn__card.is-open .gn__title {
  font-size: 18px;
}

::view-transition-group(gn-card),
::view-transition-group(gn-thumb),
::view-transition-group(gn-title) {
  animation-duration: 600ms;
  animation-timing-function: cubic-bezier(0.2, 0.8, 0.2, 1);
}

@media (max-width: 340px) {
  .gn__card {
    padding: 8px;
    gap: 8px;
  }
  .gn__thumb {
    width: 44px;
    height: 44px;
  }
  .gn__title {
    font-size: 12px;
  }
  .gn__card.is-open {
    padding: 12px;
  }
  .gn__card.is-open .gn__thumb {
    height: 70px;
  }
  .gn__card.is-open .gn__title {
    font-size: 15px;
  }
}
@media (prefers-reduced-motion: reduce) {
  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
}