Pull Cord Switch

<!-- Pull Cord Switch — click to pull the cord and swap the bulb state -->
<button class="nuda-tt2-pullcord" type="button" aria-pressed="true" aria-label="Toggle theme">
  <span class="nuda-tt2-pullcord__glow" aria-hidden="true"></span>
  <span class="nuda-tt2-pullcord__bulb" aria-hidden="true"></span>
  <span class="nuda-tt2-pullcord__string" aria-hidden="true"></span>
  <span class="nuda-tt2-pullcord__knob" aria-hidden="true"></span>
</button>

/* Pull Cord Switch — toggle aria-pressed to swing the cord and dim the bulb. */
(function () {
  var btn = document.querySelector('.nuda-tt2-pullcord');
  if (!btn) return;
  btn.addEventListener('click', function () {
    var pressed = btn.getAttribute('aria-pressed') === 'true';
    btn.setAttribute('aria-pressed', String(!pressed));
    document.documentElement.classList.toggle('dark', !pressed);
  });
})();

.nuda-tt2-pullcord {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 64px;
  height: 120px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px 0 0;
}

.nuda-tt2-pullcord:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 3px;
  border-radius: 8px;
}

.nuda-tt2-pullcord__bulb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%,#fffbe6,#fbbf24);
  box-shadow: 0 0 20px 6px rgba(251,191,36,.55);
  transition: background .4s ease,box-shadow .4s ease;
}

.nuda-tt2-pullcord[aria-pressed="true"] .nuda-tt2-pullcord__bulb {
  background: radial-gradient(circle at 35% 30%,#3a3a42,#18181c);
  box-shadow: 0 0 0 rgba(0,0,0,0);
}

.nuda-tt2-pullcord__glow {
  position: absolute;
  top: 8px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: radial-gradient(circle,rgba(251,191,36,.35),transparent 70%);
  opacity: 1;
  transition: opacity .4s ease;
  pointer-events: none;
}

.nuda-tt2-pullcord[aria-pressed="true"] .nuda-tt2-pullcord__glow {
  opacity: 0;
}

.nuda-tt2-pullcord__string {
  width: 2px;
  height: 46px;
  background: rgba(255,255,255,.35);
  transform-origin: top center;
  transform: rotate(0deg);
}

.nuda-tt2-pullcord[aria-pressed="true"] .nuda-tt2-pullcord__string {
  animation: nuda-tt2-pullcord-swing .9s cubic-bezier(.34,1.56,.64,1);
}

.nuda-tt2-pullcord__knob {
  width: 10px;
  height: 14px;
  border-radius: 5px;
  background: #e4ff54;
  margin-top: -2px;
  box-shadow: 0 0 6px rgba(228,255,84,.5);
}

@keyframes nuda-tt2-pullcord-swing {
  0% {
    transform: rotate(0);
  }
  30% {
    transform: rotate(14deg);
  }
  60% {
    transform: rotate(-8deg);
  }
  100% {
    transform: rotate(0);
  }
}

@media (prefers-reduced-motion:reduce) {
  .nuda-tt2-pullcord__string {
    animation: none;
  }
  .nuda-tt2-pullcord__bulb,.nuda-tt2-pullcord__glow {
    transition: none;
  }
}