body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    color: #333;
}
header {
    text-align: center;
    padding: 20px;
    background-color: lavender;
    color: #000;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
h1 {
    margin: 0;
    font-size: 2.5rem;
}
.quiz-container {
    max-width: 800px;
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
.question {
    font-size: 1.2rem;
    margin-bottom: 15px;
}
.options {
    list-style: none;
    padding: 0;
}
.options li {
    margin-bottom: 10px;
}
.options input[type="radio"] {
    margin-right: 10px;
}
.submit-btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.3s ease;
}
.submit-btn:hover {
    background-color: #0056b3;
}
.result {
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: bold;
    color: green;
}
.result.incorrect {
    color: red;
}