* {
  margin: 5px;
}

body {
  width: 700px;
  background-color: lightgoldenrodyellow;
}

#input_form {
  display: grid;
}

#ButtonSend {
  font-size: larger;
  margin-top: 50px;
}

#mainPage {
  font-size: x-large;
}

#mainPage ul {
  list-style: none;
}