body {
    background: linear-gradient(135deg, #e6f2e6, #d2f0d2);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
    margin: 0;
    padding: 0;
  }
  
  .form-container {
    max-width: 500px;
    margin: 60px auto;
    background-color: #fdfefc;
    padding: 30px;
    border-radius: 16px;
    box-shadow: 0 4px 16px rgba(40, 167, 69, 0.2);
    border-top: 5px solid #28a745;
  }
  
  .btn-green {
    background-color: #28a745;
    color: white;
    border: none;
  }
  
  .btn-green:hover {
    background-color: #218838;
  }
  
  .form-title {
    color: #2f8f2f;
    text-align: center;
    margin-bottom: 20px;
    font-weight: bold;
  }
  
  .message {
    margin-top: 15px;
    font-weight: 500;
  }
  
  input:focus, button:focus {
    box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
    border-color: #28a745;
  }
  
  input.form-control {
    background-color: #f8fdf8;
    border: 1px solid #cce5cc;
  }