body {
    background-color: #f8f9fa;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  }
  
  .container {
    padding-top: 50px;
    padding-bottom: 130px;
  }
  
  .card {
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  }
  
  .card-header {
    background-color: #6c757d;
    color: #fff;
  }
  
  .required-star {
    color: red;
    margin-left: 4px;
  }
  
  .bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    border-top: 1px solid #dee2e6;
    display: flex;
    justify-content: space-around;
    padding: 8px 0;
    z-index: 1000;
  }
  
  .bottom-nav .nav-item {
    text-align: center;
    flex: 1;
    color: #6c757d;
    font-size: 14px;
    text-decoration: none;
  }
  
  .bottom-nav .nav-item.active {
    color: #007bff;
    font-weight: bold;
  }
  
  .bottom-nav .nav-item i {
    font-size: 20px;
    display: block;
  }
  
  .btn-primary {
    background-color: #007bff;
    border-color: #007bff;
  }
  
  .btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
  }
  
  .alert {
    margin-top: 15px;
    font-size: 14px;
  }