body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 20px;
  background-color: #f0f0f0;
}

main {
  max-width: 800px;
  margin: 0 auto;
}

h2, h3 {
  color: #333;
}

button {
  padding: 8px 16px;
  margin: 5px;
  background-color: #007BFF;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #0056b3;
}

input[type="text"] {
  padding: 8px;
  margin: 5px;
  width: calc(100% - 100px);
  border: 1px solid #ccc;
  border-radius: 5px;
}

input[type="file"] {
  margin: 10px 0;
}