body {
    font-family: sans-serif;
    background: #ddd;
    padding: 1em;
    max-width: 600px;
    margin: auto;
  }
  h1 {
    text-align: center;
  }
  .controls {
    display: flex;
    flex-direction: column;
    gap: 1em;
  }
  label {
    display: flex;
    flex-direction: column;
    font-size: 0.9em;
  }
  input[type="file"],
  input[type="number"],
  textarea {
    margin-top: 0.5em;
  }
  button {
    padding: 0.5em 1em;
    font-size: 1em;
    cursor: pointer;
    align-self: flex-start;
  }