body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    margin: 0;
}

header {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
}

.container {
    padding: 2rem;
}

.card {
    background: white;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 5px solid #3498db;
}

.quiz-section {
    background: #34495e;
    color: white;
    padding: 2rem;
}

.question {
    background: white;
    color: black;
    padding: 1rem;
    margin-bottom: 1rem;
}