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

.container {
  max-width: 800px;
}

fieldset {
  margin-bottom: 16px;
}

label,
input,
textarea,
button {
  display: block;
  margin-bottom: 10px;
}

input,
textarea {
  width: 100%;
}