body {
  font-family: sans-serif;
  padding: 20px;
  background-color: #f4f4f4;
}
form {
  background: #fff;
  padding: 20px;
  max-width: 400px;
  margin: auto;
  border-radius: 10px;
  box-shadow: 0 0 10px #ccc;
}
input, textarea {
  margin-bottom: 10px;
  padding: 10px;
  width: 100%;
  box-sizing: border-box;
}