body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #4CAF50;
}

.question {
    margin-bottom: 20px;
}

label {
    display: block;
    margin: 10px 0;
    padding: 10px;
    border-radius: 5px;
    background-color: #e0f7fa;
    cursor: pointer;
    transition: background-color 0.3s;
}

label:hover {
    background-color: #b2ebf2;
}

button {
    display: inline-block;
    width: 48%;
    padding: 10px;
    margin-top: 20px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    text-align: center;
}

button:hover {
    background-color: #45a049;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    text-align: center;
    color: #0000ff;
}

.correct::after {
    content: ' ✔️';
    color: green;
    font-size: 20px;
    margin-left: 10px;
}

.incorrect::after {
    content: ' ❌';
    color: red;
    font-size: 20px;
    margin-left: 10px;
}