.size-demo {
  display: flex;
  gap: 20px;
  margin: 20px 0;
  align-items: flex-start;
}

.size-box {
  border: 2px solid #17a2b8;
  padding: 10px;
  background: #e1f7fa;
  min-height: 100px;
  width: 200px;
}

.size-contained {
  contain: size;
  border-color: #20c997;
  background: #e8f8f5;
  height: 120px; /* Fixed height required with size containment */
}

.size-content {
  background: white;
  padding: 8px;
  margin: 5px 0;
  border: 1px solid #ccc;
}

.add-content-btn {
  background: #007bff;
  color: white;
  border: none;
  padding: 5px 10px;
  border-radius: 3px;
  cursor: pointer;
  margin: 5px 0;
}

.add-content-btn:hover {
  background: #0056b3;
}