body {
      margin: 0;
      padding: 0;
    }

    /* Sidebar menu */
    #sidebar {
      width: 100px;
      background: white;
      border: 1px solid black;
      border-radius: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 10px 0;
      gap: 15px;
      box-sizing: border-box;
      position: fixed;
      top: 50%;
      left: 10px;
      transform: translateY(-50%);
      z-index: 1000;
      box-shadow: 0 2px 5px rgba(0,0,0,0.15);
    }

    /* Button styling */
    #sidebar button {
      position: relative;
      background: none;
      border: none;
      cursor: pointer;
      padding: 0;
      transition: transform 0.2s ease;
    }

    #sidebar button:hover {
      transform: scale(1.1);
    }

    #sidebar img {
      width: 60px;
      height: 60px;
      object-fit: contain;
    }

    /* Tooltip styling */
    .tooltip {
      visibility: hidden;
      opacity: 0;
      position: absolute;
      left: 80px;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(0, 0, 0, 0.8);
      color: white;
      padding: 5px 10px;
      border-radius: 6px;
      white-space: nowrap;
      font-size: 13px;
      transition: opacity 0.3s ease;
      pointer-events: none;
    }

    #sidebar button:hover .tooltip {
      visibility: visible;
      opacity: 1;
    }

    /* Map container fills screen */
    #map {
      height: 100vh;
      width: 100vw;
    }

    .popup-content img {
      border-radius: 6px;
      margin-top: 5px;
    }