iOS Switch Glow

<!-- iOS Switch Glow — iOS-style switch that glows lime when on -->
<label class="nuda-ios-switch-glow" aria-label="Toggle">
  <input type="checkbox" />
  <span class="nuda-ios-switch-glow__track">
    <span class="nuda-ios-switch-glow__thumb"></span>
  </span>
</label>

/* ── iOS Switch Glow ─────────────────────────────────────────
   Customize:
     --nuda-isg-on   : on-state track color
     --nuda-isg-glow : glow color
   ──────────────────────────────────────────────────────────── */
.nuda-ios-switch-glow {
  --nuda-isg-on: #e4ff54;
  --nuda-isg-glow: rgba(228, 255, 84, 0.6);
  display: inline-flex;
  cursor: pointer;
}

.nuda-ios-switch-glow input {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px;
  clip: rect(0, 0, 0, 0);
  overflow: hidden;
}

.nuda-ios-switch-glow__track {
  position: relative;
  display: inline-block;
  width: 54px;
  height: 30px;
  border-radius: 99px;
  background: #2a2a32;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nuda-ios-switch-glow__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #fafafa;
  transform: translateX(0);
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.nuda-ios-switch-glow input:checked + .nuda-ios-switch-glow__track {
  background: var(--nuda-isg-on);
  box-shadow: 0 0 14px var(--nuda-isg-glow), 0 0 30px rgba(228, 255, 84, 0.3);
}

.nuda-ios-switch-glow input:checked + .nuda-ios-switch-glow__track .nuda-ios-switch-glow__thumb {
  transform: translateX(24px);
  background: #09090b;
}

.nuda-ios-switch-glow input:focus-visible + .nuda-ios-switch-glow__track {
  outline: 2px solid var(--nuda-isg-on);
  outline-offset: 3px;
}

/* ── Accessibility ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .nuda-ios-switch-glow__track,
  .nuda-ios-switch-glow__thumb { transition: none; }
}