body {
    font-family: 'Segoe UI', sans-serif;
    background: #f9f9fb;
    margin: 0;
    padding: 20px;
  }

  .container {
    max-width: 800px;
    margin: auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  }

  h2 {
    text-align: center;
    color: #4CAF50;
  }

  label {
    font-weight: 600;
    display: block;
    margin: 12px 0 4px;
  }

  input, select, textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    margin-bottom: 15px;
  }

  .row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
  }

  .col-half {
    flex: 1 1 48%;
  }

  .checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .submit-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    display: block;
    margin: 20px auto 0;
  }

  .submit-btn:hover {
    background-color: #45a049;
  }

  @media (max-width: 600px) {
    .col-half {
      flex: 1 1 100%;
    }
  }