body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f7f9;
    color: #333;
  }

  .container {
    max-width: 800px;
    margin: 50px auto;
    padding: 40px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  }

  h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 30px;
  }

  form {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  label {
    font-weight: 600;
  }

  input[type="text"],
  input[type="email"],
  textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
  }

  textarea {
    min-height: 120px;
    resize: vertical;
  }

  button {
    padding: 12px 25px;
    background-color: #3498db;
    border: none;
    color: #fff;
    font-size: 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }

  button:hover {
    background-color: #2980b9;
  }

  .success-message {
    background-color: #e0f9e0;
    border: 1px solid #b2e2b2;
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 20px;
    color: #2d882d;
  }

  a.back {
    display: inline-block;
    margin-top: 25px;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
  }

  a.back:hover {
    text-decoration: underline;
  }