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);
}

.fv5 {
  width: min(240px, 86vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fv5__field {
  position: relative;
  display: block;
}

.fv5__ring {
  position: absolute;
  inset: -5px;
  border-radius: 12px;
  box-shadow: 0 0 0 3px #ffe0d8;
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.fv5__input {
  position: relative;
  box-sizing: border-box;
  width: 100%;
  padding: 8px 12px;
  border-radius: 8px;
  border: 2px solid #c2361a;
  background: rgba(255, 255, 255, 0.06);
  color: #fff7e6;
  font-weight: 400;
  font-size: 14px;
  line-height: 1;
  font-family: inherit;
}

.fv5__msg {
  margin: 0;
  color: #c2361a;
  font-weight: 500;
  font-size: 11px;
  line-height: 1.3;
  font-family: inherit;
}

@keyframes fv5-breathe {
  0%, 100% {
    opacity: 0;
    transform: scale(0.97);
  }
  50% {
    opacity: 1;
    transform: scale(1.03);
  }
  54% {
    opacity: 0.45;
    transform: scale(0.99);
  }
  58% {
    opacity: 0.72;
    transform: scale(1.022);
  }
  62% {
    opacity: 0.3;
    transform: scale(0.992);
  }
  66% {
    opacity: 0.48;
    transform: scale(1.015);
  }
  70% {
    opacity: 0.18;
    transform: scale(0.995);
  }
  74% {
    opacity: 0.28;
    transform: scale(1.009);
  }
  78% {
    opacity: 0.1;
    transform: scale(0.997);
  }
  82% {
    opacity: 0.15;
    transform: scale(1.005);
  }
  86% {
    opacity: 0.05;
    transform: scale(0.999);
  }
  92% {
    opacity: 0;
    transform: scale(0.97);
  }
}
.fv5.is-demo .fv5__ring {
  animation: fv5-breathe 2s ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .fv5.is-demo .fv5__ring {
    animation: none !important;
    opacity: 0.7;
    transform: scale(1);
  }
}