TOTP Ring Timer

<div class="nuda-au2-totp-ring">
  <div class="nuda-au2-totp-ring__head">
    <svg class="nuda-au2-totp-ring__ring" aria-hidden="true" viewBox="0 0 44 44">
      <circle class="nuda-au2-totp-ring__track" cx="22" cy="22" r="19"></circle>
      <circle class="nuda-au2-totp-ring__prog" cx="22" cy="22" r="19"></circle>
    </svg>
    <div class="nuda-au2-totp-ring__label">
      <span class="nuda-au2-totp-ring__title">Two-factor code</span>
      <span class="nuda-au2-totp-ring__sub">Refreshes every 30s</span>
    </div>
  </div>
  <form class="nuda-au2-totp-ring__form">
    <label class="nuda-au2-totp-ring__fieldlabel" for="au2-totp-code">6-digit code</label>
    <input id="au2-totp-code" class="nuda-au2-totp-ring__input" type="text" inputmode="numeric" pattern="[0-9]*" autocomplete="one-time-code" maxlength="6" placeholder="••••••" required />
    <button class="nuda-au2-totp-ring__cta" type="submit">Verify</button>
  </form>
</div>

.nuda-au2-totp-ring {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
  width: 100%;
  max-width: 280px;
  background: #0a0a0a;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
}

.nuda-au2-totp-ring__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nuda-au2-totp-ring__ring {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  transform: rotate(-90deg);
}

.nuda-au2-totp-ring__track {
  fill: none;
  stroke: rgba(255,255,255,.1);
  stroke-width: 3;
}

.nuda-au2-totp-ring__prog {
  fill: none;
  stroke: #e4ff54;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 119.4;
  stroke-dashoffset: 0;
  animation: nuda-au2-totp-ring-drain 30s linear infinite;
  will-change: stroke-dashoffset;
}

.nuda-au2-totp-ring__label {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.nuda-au2-totp-ring__title {
  color: #fafafa;
  font-size: 13px;
  font-weight: 600;
}

.nuda-au2-totp-ring__sub {
  color: #777;
  font-size: 11px;
}

.nuda-au2-totp-ring__form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nuda-au2-totp-ring__fieldlabel {
  color: #cfcfcf;
  font-size: 11px;
}

.nuda-au2-totp-ring__input {
  width: 100%;
  box-sizing: border-box;
  padding: 12px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 10px;
  color: #fafafa;
  font-size: 16px;
  letter-spacing: .35em;
  text-align: center;
  outline: none;
  transition: border-color .2s,box-shadow .2s;
}

.nuda-au2-totp-ring__input:focus-visible {
  border-color: #e4ff54;
  box-shadow: 0 0 0 3px rgba(228,255,84,.15);
}

.nuda-au2-totp-ring__cta {
  min-height: 44px;
  padding: 10px;
  background: #e4ff54;
  color: #0a0a0a;
  border: 0;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: filter .2s,transform .15s;
}

.nuda-au2-totp-ring__cta:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.nuda-au2-totp-ring__cta:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 2px;
}

@keyframes nuda-au2-totp-ring-drain {
  0% {
    stroke-dashoffset: 0;
  }
  100% {
    stroke-dashoffset: 119.4;
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-au2-totp-ring__prog {
    animation: none;
    stroke-dashoffset: 40;
  }
}