<div class="hu-stage">
  <figure class="hu-house" aria-label="Loading your home tour">
    <span class="hu-roof"></span>
    <span class="hu-body">
      <span class="hu-window">
        <span class="hu-window-glass"></span>
      </span>
      <span class="hu-door">
        <span class="hu-door-handle"></span>
        <span class="hu-key">
          <span class="hu-key-bow"></span>
          <span class="hu-key-shaft"></span>
          <span class="hu-key-teeth"></span>
        </span>
      </span>
      <span class="hu-floor"></span>
    </span>
    <figcaption class="hu-caption">Unlocking your tour…</figcaption>
  </figure>
</div>

.hu-stage {
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(60% 60% at 50% 100%, rgba(212, 175, 55, 0.1) 0%, transparent 70%),
    linear-gradient(180deg, #14132b 0%, #0b0b1a 100%);
  border-radius: 16px;
  width: 220px;
  height: 220px;
}

.hu-house {
  position: relative;
  width: 132px;
  height: 152px;
  margin: 0;
  padding: 0;
  font-family: system-ui, sans-serif;
}

.hu-roof {
  position: absolute;
  top: 0;
  left: 50%;
  width: 0;
  height: 0;
  border: 30px solid transparent;
  border-bottom-color: #d4af37;
  transform: translateX(-50%);
  filter: drop-shadow(0 4px 10px rgba(212, 175, 55, 0.25));
}

.hu-body {
  position: absolute;
  top: 56px;
  left: 6px;
  width: 120px;
  height: 86px;
  background: linear-gradient(180deg, #f5f0e6 0%, #e8e0d0 100%);
  border-radius: 4px 4px 6px 6px;
  box-shadow: 0 12px 28px -12px rgba(0, 0, 0, 0.55);
  overflow: hidden;
}

.hu-floor {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: #2a1f1a;
}

.hu-window {
  position: absolute;
  top: 14px;
  left: 14px;
  width: 36px;
  height: 28px;
  border: 2px solid #d4af37;
  border-radius: 3px;
  background: #0a0a14;
  overflow: hidden;
  transition:
    background 0.6s ease,
    box-shadow 0.6s ease;
}

.hu-window::before,
.hu-window::after {
  content: "";
  position: absolute;
  background: #d4af37;
}

.hu-window::before {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1.5px;
  transform: translateX(-50%);
}

.hu-window::after {
  left: 0;
  right: 0;
  top: 50%;
  height: 1.5px;
  transform: translateY(-50%);
}

.hu-window-glass {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 70%, #ffd479 0%, #d4af37 50%, transparent 75%);
  opacity: 0;
  transform: scale(0.7);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.hu-door {
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 38px;
  height: 60px;
  margin-left: -19px;
  background: linear-gradient(180deg, #6b3f2a 0%, #4a2d1f 100%);
  border-radius: 5px 5px 0 0;
  border: 1px solid rgba(0, 0, 0, 0.4);
  transform-origin: left center;
  transform: rotateY(0deg);
  transition: transform 0.85s cubic-bezier(0.5, 0, 0.3, 1.2);
  box-shadow: inset -2px 0 0 rgba(255, 255, 255, 0.04);
}

.hu-door-handle {
  position: absolute;
  right: 5px;
  top: 50%;
  width: 5px;
  height: 5px;
  margin-top: -2.5px;
  background: #d4af37;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(212, 175, 55, 0.55);
}

.hu-key {
  position: absolute;
  right: 10px;
  top: 50%;
  width: 22px;
  height: 8px;
  margin-top: -4px;
  transform-origin: 18px center;
  animation: huKeyTurn 2.4s cubic-bezier(0.5, 0, 0.3, 1.2) infinite;
}

.hu-key-bow {
  position: absolute;
  left: 0;
  top: -3px;
  width: 14px;
  height: 14px;
  border: 2px solid #d4af37;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.12);
  box-shadow: 0 0 8px rgba(212, 175, 55, 0.35);
}

.hu-key-shaft {
  position: absolute;
  left: 12px;
  top: 50%;
  width: 9px;
  height: 2px;
  margin-top: -1px;
  background: #d4af37;
  border-radius: 1px;
}

.hu-key-teeth {
  position: absolute;
  right: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  margin-top: -2px;
  background: #d4af37;
  border-radius: 0 1px 1px 0;
  box-shadow: -3px 2px 0 0 #d4af37;
}

.hu-caption {
  position: absolute;
  left: 50%;
  bottom: -28px;
  transform: translateX(-50%);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  color: #d4af37;
  white-space: nowrap;
  animation: huCaption 2.4s ease-in-out infinite;
}

.hu-house.ready .hu-window {
  background: #ffd479;
  box-shadow:
    0 0 14px rgba(255, 212, 121, 0.55),
    inset 0 0 12px rgba(255, 212, 121, 0.4);
}

.hu-house.ready .hu-window-glass {
  opacity: 1;
  transform: scale(1);
}

.hu-house.ready .hu-door {
  transform: rotateY(-72deg);
}

.hu-house.ready .hu-key,
.hu-house.ready .hu-caption {
  display: none;
}
@keyframes huKeyTurn {
  0%,
  18% {
    transform: rotate(0deg) translateX(0) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  35%,
  60% {
    transform: rotate(90deg) translateX(0) scale(1);
    opacity: 1;
  }
  78% {
    transform: rotate(90deg) translateX(-6px) scale(0.6);
    opacity: 0;
  }
  100% {
    transform: rotate(0deg) translateX(0) scale(1);
    opacity: 0;
  }
}
@keyframes huCaption {
  0%,
  100% {
    opacity: 0.55;
  }
  50% {
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hu-stage,
  .hu-stage * {
    animation: none !important;
  }
}

// Drives the door-open reveal. Replace with your real "page loaded" trigger.
document.querySelectorAll(".hu-house").forEach(function (house) {
  var ready = false;
  function tick() {
    ready = !ready;
    house.classList.toggle("ready", ready);
    setTimeout(tick, ready ? 1800 : 3200);
  }
  setTimeout(tick, 3200);
});