body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    padding: 20px;
  }
  
  h1 {
    text-align: center;
  }
  
  .map-container {
    position: relative;
    display: inline-block;
  }
  
  #campus-map {
    width: 1000px;
  }
  
  .map-btn {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid #555;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
  }
  
  .map-btn:hover {
    background-color: #ffdddd;
  }
  
  #lecture-info {
    margin-top: 20px;
    background: white;
    padding: 10px;
    border: 1px solid #ccc;
    width: 300px;
  }
  
  .floor-map {
    position: relative;
    display: inline-block;
    margin-top: 20px;
  }
  
  .room-btn {
    display: none; /* 모든 강의실 버튼은 처음엔 숨김 */
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid #333;
    border-radius: 6px;
    font-size: 12px;
    padding: 3px 6px;
    cursor: pointer;
  }
  
  
  #room-info {
    margin-top: 20px;
    background: white;
    padding: 10px;
    border: 1px solid #ccc;
    width: 400px;
  }
  
  #department-select {
    margin: 10px 0;
  }
  
  .floor-map-container {
    position: relative;
    display: inline-block;
  }
  
  /* 오른쪽 상단 층 선택 버튼 */
  .floor-buttons {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 2; /* 사진 위로! */
  }
  
  /* 왼쪽 계단 업/다운 버튼 */
  .stairs-controls {
    position: absolute;
    top: 50%;
    left: 10px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transform: translateY(-50%);
    z-index: 2;
  }
  
  
  .floor-buttons button,
  .stairs-controls button {
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px solid #333;
    background-color: #fff;
    cursor: pointer;
  }