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);
}

[hidden] {
  display: none !important;
}

.fv {
  position: relative;
  box-sizing: border-box;
  width: clamp(272px, 90vw, 420px);
  height: clamp(170px, 74vh, 236px);
  overflow: hidden;
  border: 1px solid rgba(23, 20, 26, 0.1);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(23, 20, 26, 0.1);
  color: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
}

.fv__top {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 12px;
  background: rgba(23, 20, 26, 0.06);
}

.fv__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(23, 20, 26, 0.2);
}

.fv__lines {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.fv__line {
  height: 8px;
  border-radius: 4px;
  background: rgba(23, 20, 26, 0.08);
}

.fv__line--title {
  height: 12px;
  width: 56%;
  background: rgba(23, 20, 26, 0.14);
}

.fv__line--short {
  width: 62%;
}

.fv__card {
  position: absolute;
  right: 16px;
  bottom: 24px;
  box-sizing: border-box;
  width: clamp(148px, 42vw, 196px);
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid rgba(23, 20, 26, 0.1);
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 2px 8px rgba(23, 20, 26, 0.1);
  transform-origin: 100% 100%;
  transition: opacity 300ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 300ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fv__card.is-gone {
  opacity: 0;
  transform: translateY(16px) rotate(-4deg) scale(0.96);
  pointer-events: none;
}

.fv__head {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fv__shield {
  display: inline-flex;
  color: #2f6df6;
}

.fv__title {
  font-size: clamp(11px, 3.2vw, 13px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.fv__desc {
  margin: 0;
  font-size: clamp(9px, 2.6vw, 11px);
  line-height: 1.4;
  color: rgba(23, 20, 26, 0.72);
}

.fv__list, .fv__prefs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.fv__row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  font-size: clamp(9px, 2.6vw, 11px);
  font-weight: 600;
  color: rgba(23, 20, 26, 0.72);
}

.fv__ic {
  display: inline-flex;
  flex: 0 0 auto;
  color: #2f6df6;
}

.fv__label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.fv__check {
  width: 12px;
  height: 12px;
  margin: 0;
  flex: 0 0 auto;
  accent-color: #2f6df6;
}

.fv__btns {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
}

.fv__btn {
  min-width: 0;
  border: 1px solid rgba(23, 20, 26, 0.2);
  border-radius: 12px;
  padding: 8px 12px;
  background: #ffffff;
  color: rgba(23, 20, 26, 0.72);
  font-family: inherit;
  font-size: clamp(9px, 2.6vw, 11px);
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: background 220ms ease-out, transform 140ms ease-out;
}

.fv__btn:hover, .fv__btn:focus-visible {
  background: rgba(23, 20, 26, 0.06);
}

.fv__btn:active {
  transform: scale(0.97);
}

.fv__btn--primary {
  border-color: #2f6df6;
  background: #2f6df6;
  color: #ffffff;
}

.fv__btn--primary:hover, .fv__btn--primary:focus-visible {
  background: #2f6df6;
  filter: brightness(0.94);
}

.fv__card.is-demo {
  animation: fv-card 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

@keyframes fv-card {
  0%, 100% {
    opacity: 0;
    transform: translateY(16px) rotate(-4deg) scale(0.96);
  }
  18%, 78% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
}
.fv__card.is-demo .fv__row {
  animation: fv-row 2s cubic-bezier(0.2, 0.8, 0.2, 1) infinite;
}

.fv__card.is-demo .fv__row--a {
  animation-delay: 0.1s;
}

.fv__card.is-demo .fv__row--b {
  animation-delay: 0.16s;
}

.fv__card.is-demo .fv__row--c {
  animation-delay: 0.22s;
}

@keyframes fv-row {
  0%, 100% {
    opacity: 0;
    transform: translateY(8px);
  }
  16%, 74% {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (max-width: 340px) {
  .fv__card {
    bottom: 20px;
    gap: 4px;
    padding: 8px;
  }
  .fv__lines {
    gap: 8px;
    padding: 12px;
  }
  .fv__btn {
    padding: 4px 8px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .fv__card.is-demo, .fv__card.is-demo .fv__row {
    animation: none !important;
  }
  .fv__card.is-demo {
    opacity: 1;
    transform: none;
  }
  .fv__card.is-demo .fv__row {
    opacity: 1;
    transform: none;
  }
  .fv__card, .fv__btn {
    transition: none;
  }
}