body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 0;
  color: #333;
}
.container {
  max-width: 700px;
  margin: 2rem auto;
  background: #fff;
  padding: 1.5rem 2rem;
  border-radius: 4px;
}
h2 {
  color: #222;
}
form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
input, textarea {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}
button {
  background: #007bff;
  color: white;
  border: none;
  padding: 10px 15px;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
}
button:hover {
  background: #0056b3;
}
.success {
  background: #d4edda;
  color: #155724;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 1rem;
}
.error {
  background: #f8d7da;
  color: #721c24;
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 1rem;
}