body {
  font-family: Arial, sans-serif;
  background: #f5f5f5;
  margin: 0;
  padding: 20px;
}
header {
  text-align: center;
  background-color: #2e8b57;
  color: white;
  padding: 20px;
}
form {
  max-width: 800px;
  margin: auto;
}
section {
  margin-bottom: 30px;
  background-color: white;
  padding: 15px;
  border-radius: 8px;
}
input, select, button {
  display: block;
  margin: 10px 0;
  padding: 10px;
  width: 100%;
  box-sizing: border-box;
}
button {
  background-color: #2e8b57;
  color: white;
  border: none;
  cursor: pointer;
}
button:hover {
  background-color: #3aa169;
}
#progress-bar {
  width: 100%;
}