Biometric Prompt

<div class="nuda-biometric">
  <div class="nuda-biometric__icon">
    <svg viewBox="0 0 24 24" fill="none" stroke="currentColor"
         stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
      <path d="M5 12c0-3.5 3.5-7 7-7s7 3.5 7 7" />
      <path d="M5 12v3" />
      <path d="M9 8c1-1 2-1 3-1s2 0 3 1" />
      <path d="M8 14v2" />
      <path d="M12 9v6" />
      <path d="M16 14v2" />
      <path d="M9 19c1 .5 2 1 3 1s2-.5 3-1" />
    </svg>
    <span class="nuda-biometric__ring"></span>
  </div>
  <div class="nuda-biometric__label">Touch sensor to sign in</div>
</div>

.nuda-biometric {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px;
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 16px;
  width: 100%;
  max-width: 240px;
}

.nuda-biometric__icon {
  position: relative;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(228,255,84,.06);
  border-radius: 50%;
  color: #e4ff54;
}

.nuda-biometric__icon svg {
  width: 32px;
  height: 32px;
  animation: _bioFlick 2.4s ease-in-out infinite;
}

.nuda-biometric__ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(228,255,84,.4);
  animation: _bioRing 2.4s ease-out infinite;
}

.nuda-biometric__label {
  font-size: 12px;
  color: #a0a0a8;
  font-weight: 500;
  text-align: center;
}

@keyframes _bioFlick {
  0%,100% {
    filter: drop-shadow(0 0 0 transparent);
  }
  50% {
    filter: drop-shadow(0 0 8px #e4ff54);
  }
}

@keyframes _bioRing {
  0% {
    transform: scale(1);
    opacity: .7;
  }
  100% {
    transform: scale(1.6);
    opacity: 0;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-biometric__icon svg,.nuda-biometric__ring {
    animation: none;
  }
}