body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
  }
   
  .container {
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 400px;
  }
   
  h1 {
    text-align: center;
    color: #333;
  }
   
  .form-group {
    margin-bottom: 15px;
  }
   
  .form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
  }
   
  .form-group input[type="text"],
  .form-group input[type="email"],
  .form-group input[type="password"] {
    width: calc(100% - 22px); /* Account for padding and border */
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* Makes width calculation easier */
  }
   
  .form-group input:invalid {
    border-color: #e74c3c; /* Light red for invalid built-in states */
  }
  /* You can add a .valid class if you want to style valid inputs too */
   
  .form-group .error-message {
    display: block;
    color: #e74c3c; /* Red for error messages */
    font-size: 0.9em;
    margin-top: 5px;
    min-height: 1em; /* Reserve space to prevent layout shifts */
  }
   
  .form-group small {
      display: block;
      font-size: 0.8em;
      color: #777;
      margin-top: 3px;
  }
   
  button[type="submit"] {
    width: 100%;
    padding: 10px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
  }
   
  button[type="submit"]:hover {
    background-color: #2980b9;
  }