body {
  font-family: sans-serif;
  background-color: #f5f5f5;
  color: #333;
  padding: 2rem;
}

.container {
  max-width: 800px;
  margin: auto;
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

input[type="file"] {
  display: block;
  margin: 0.5rem 0 1rem 0;
}

pre {
  background: #eee;
  padding: 1rem;
  border-radius: 4px;
  overflow-x: auto;
}