body {
  font-family: Arial, sans-serif;
  margin: 40px;
  background: #f4f4f4;
  color: #333;
}

h1 {
  text-align: center;
}

form {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

input {
  padding: 8px;
  font-size: 14px;
}

button {
  padding: 8px 12px;
  margin-left: 8px;
  background: #007BFF;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #0056b3;
}

ul {
  list-style-type: none;
  padding: 0;
  max-width: 400px;
  margin: auto;
}

li {
  padding: 8px;
  margin: 4px 0;
  background: white;
  border: 1px solid #ddd;
}