/* style.css */
body {
  font-family: sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 2rem;
  text-align: center;
}
.container {
  max-width: 600px;
  margin: auto;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
button {
  padding: 0.7rem 1.5rem;
  margin: 0.5rem;
  font-size: 1rem;
}
input {
  padding: 0.7rem;
  font-size: 1rem;
  width: 80%;
}
.correct {
  background-color: #d4edda;
}
.incorrect {
  background-color: #f8d7da;
}