body {
  font-family: Arial, sans-serif;
  margin: 20px;
  display: flex;
  gap: 20px;
}
#sidebar {
  width: 200px;
  border-right: 1px solid #ccc;
  padding-right: 15px;
}

#main {
  flex: 1;
}

.bulb-item {
  padding: 5px;
  cursor: pointer;
  border: 1px solid #aaa;
  border-radius: 5px;
  margin-bottom: 5px;
}

.bulb-item.selected {
  background: #e0e0ff;
}

#visualization {
  width: 200px;
  height: 250px;
  border: 2px solid #333;
  border-radius: 10px;
  margin-top: 20px;
  background: #111;
  position: relative;
  overflow: visible;   
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding-bottom: 15px;
}

#light {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, #000 0%, #000 100%);
  transition: background 0.25s ease, box-shadow 0.35s ease;
  z-index: 2;
}