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

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #ffd23f;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.fv2 {
  width: min(240px, 86vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fv2__label-wrap {
  position: relative;
  height: 14px;
  display: block;
}

.fv2__label {
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 600;
  font-size: 12px;
  line-height: 1;
  font-family: inherit;
  white-space: nowrap;
}

.fv2__label--neutral {
  color: #17141a;
  opacity: 0.6;
}

.fv2__label--ok {
  color: #4cd4a6;
  opacity: 0;
}

.fv2__input {
  box-sizing: border-box;
  width: 100%;
  padding: 8px 12px;
  border-radius: 8px;
  border: 2px solid #17141a;
  background: rgba(23, 20, 26, 0.06);
  color: #17141a;
  font-weight: 400;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
}

@keyframes fv2-ok {
  0%, 20% {
    opacity: 0;
  }
  40%, 90% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes fv2-neutral {
  0%, 20% {
    opacity: 0.6;
  }
  40%, 90% {
    opacity: 0;
  }
  100% {
    opacity: 0.6;
  }
}
.fv2.is-demo .fv2__label--ok {
  animation: fv2-ok 2s ease-out infinite;
}

.fv2.is-demo .fv2__label--neutral {
  animation: fv2-neutral 2s ease-out infinite;
}

.fv2.is-demo .fv2__input {
  animation: fv2-shake 2s ease-out infinite, fv2-surge 2s ease-out infinite;
}

@keyframes fv2-shake {
  0%, 40%, 46%, 100% {
    transform: translateX(0);
  }
  41.5% {
    transform: translateX(0.8px);
  }
  43% {
    transform: translateX(-0.5px);
  }
  44.5% {
    transform: translateX(0.25px);
  }
}
@keyframes fv2-surge {
  0%, 40% {
    box-shadow: 0 0 0 0 rgba(76, 212, 166, 0);
  }
  42% {
    box-shadow: 0 0 0 6px rgba(76, 212, 166, 0.5);
  }
  44% {
    box-shadow: 0 0 0 2px rgba(76, 212, 166, 0.22);
  }
  46% {
    box-shadow: 0 0 0 3.5px rgba(76, 212, 166, 0.3);
  }
  50%, 100% {
    box-shadow: 0 0 0 0 rgba(76, 212, 166, 0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .fv2.is-demo .fv2__label--ok,
  .fv2.is-demo .fv2__label--neutral {
    animation: none !important;
  }
  .fv2.is-demo .fv2__label--ok {
    opacity: 1;
  }
  .fv2.is-demo .fv2__label--neutral {
    opacity: 0;
  }
  .fv2.is-demo .fv2__input {
    animation: none !important;
  }
}