body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f9f9f9;
  }
  
  #login-screen, #app-screen {
    background-color: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
  }
  
  h1, h2, h3 {
    color: #333;
  }
  
  input[type="text"] {
    width: calc(100% - 22px);
    padding: 10px;
    margin-top: 10px;
    border: 1px solid #ccc;
    border-radius: 8px;
  }
  
  button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 12px 20px;
    margin-top: 10px;
    border-radius: 8px;
    cursor: pointer;
  }
  
  button:hover {
    background-color: #0056b3;
  }
  
  ul {
    list-style: none;
    padding: 0;
  }
  
  li {
    background-color: #e7f3ff;
    margin-top: 8px;
    padding: 10px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
  }
  
  #map {
    margin-top: 20px;
    border-radius: 8px;
    overflow: hidden;
  }