/* Top navigation bar */
  .navbar {
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    padding: 20px 0;
    background: rgb(0, 0, 0);
    opacity: 1;
    z-index: 2;
    font-size: 1.2rem;
    font-weight: bold;
  }

  .navbar a, .dropdown-btn {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background 0.3s, color 0.3s;
    cursor: pointer;
    display: inline-block;
    text-align: center;
  }

  .navbar a:hover, .dropdown-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
  }

  /* Dropdown container */
  .dropdown {
    position: relative;
    display: inline-block;
    text-align: center;
  }

  .dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: rgba(0,0,0,0.85);
    min-width: 160px;
    z-index: 3;
    border-radius: 4px;
    overflow: hidden;
    flex-direction: column;
  }

  .dropdown-content a {
    display: block;
    padding: 10px 16px;
    color: white;
    text-decoration: none;
    text-align: left;
  }

  .dropdown-content a:hover {
    background: rgba(255, 255, 255, 0.2);
  }

  .dropdown:hover .dropdown-content {
    display: flex;
  }