body {
  font-family: Arial, sans-serif;
  margin: 2em;
  background: #f9f9f9;
  color: #222;
}
h1, h2 {
  color: #2196f3;
}
button {
  margin: 1em 0.5em;
  padding: 0.5em 1em;
  font-size: 1em;
  background: #2196f3;
  color: #fff;
  border: none;
  border-radius: 0.3em;
  cursor: pointer;
}
button:hover {
  background: #1976d2;
}
input[type="text"] {
  padding: 0.5em;
  font-size: 1em;
  margin-right: 0.5em;
}