body {
  font-family: Arial;
  background:#f4f6f9;
}
form {
  width:300px;
  margin:100px auto;
  padding:20px;
  background:#fff;
  border-radius:8px;
}
input,button {
  width:100%;
  margin:8px 0;
  padding:10px;
}
button {
  background:#007bff;
  color:#fff;
  border:none;
}