body {
  font-family: 'Segoe UI', sans-serif;
  background: #fff8e1;
  color: #333;
  margin: 0;
  padding: 0;
}
header {
  background: #ffcc00;
  color: #000;
  padding: 1em;
  text-align: center;
}
#progressBar {
  width: 100%;
  background: #ddd;
  height: 10px;
  margin-top: 10px;
}
#progress {
  height: 10px;
  background: #4caf50;
  width: 0%;
}
main {
  padding: 2em;
}
button {
  padding: 0.8em 1.5em;
  margin: 1em 0.5em;
  font-size: 1em;
  border: none;
  border-radius: 5px;
  background: #ffc107;
  color: black;
  cursor: pointer;
}
button:hover {
  background: #ffb300;
}