body {
  font-family: Arial, sans-serif;
  margin: 40px;
  background: #f4f4f4;
}
.container {
  background: white;
  padding: 20px;
  border-radius: 8px;
  max-width: 600px;
  margin: auto;
  box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
}
input, select, button {
  padding: 8px;
  margin: 5px;
  width: 100%;
}