body {
    margin: 0;
    font-family: Arial, sans-serif;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo img {
    height: 70px;
    width: 70px;
    margin-left: 40px;
}

/* Basic reset and layout */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  .navbar {
    background-color: white;
    padding: 0 20px;
  }
  
  .nav-menu {
    list-style: none;
    display: flex;
    align-items: center;
  }
  
  .nav-menu > li {
    position: relative;
  }
  
  .nav-menu > li > a {
    display: block;
    padding: 15px 20px;
    color: black;
    text-decoration: none;
  }
  
  .nav-menu > li > a:hover {
    background-color: rgb(69, 157, 69);
  }
  
  /* Dropdown styles */
  .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    list-style: none;
    padding: 0;
    min-width: 160px;
    z-index: 1000;
  }
  
  .dropdown-menu li a {
    display: block;
    padding: 10px 15px;
    color: black;
    text-decoration: none;
  }
  
  .dropdown-menu li a:hover {
    background-color: green;
  }
  
  /* Show dropdown on hover */
  .dropdown:hover .dropdown-menu {
    display: block;
  }
  

/* Chat button */
.chat-button {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #ff7f50;
    padding: 10px 16px;
    border-radius: 30px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 999;
}

.chat-button a {
    text-decoration: none;
    color: white;
    font-weight: bold;
}