body {
  font-family: sans-serif;
  background: #f8f8f8;
  background: #222;
  margin: 0;
  padding: 1em;
  color: #222;
}
header {
  text-align: center;
}
header img {
  width: 100%;
  max-width: 200px;
}
footer {
  color: white;
  text-align: center;
}
main {
  max-width: 600px;
  margin: 1em auto;
  background: #fff;
  padding: 1em;
  border-radius: 8px;
  box-shadow: 0 2px 8px #0001;
}
.build-showcase {
  text-align: center;
}
.lego-3d-viewer {
  background: #e2e2e2;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 600px;
  margin: 1em auto;
  position: relative;
}

.carousel-btn {
  background: rgba(34, 34, 34, 0.8);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  user-select: none;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  opacity: 0.7;
}

.carousel-btn:hover {
  background: rgba(68, 68, 68, 0.9);
  opacity: 1;
  transform: translateY(-50%) scale(1.1);
}

.carousel-btn:active {
  background: rgba(0, 0, 0, 0.9);
  transform: translateY(-50%) scale(0.95);
}

.prev-btn {
  left: 10px;
}

.next-btn {
  right: 10px;
}
.lego-3d-viewer img {
  width: 100%;
  height: auto;
  max-height: 100%;
  user-select: none;
  pointer-events: none;
}