body {
    font-family: sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f4f4f4;
}

#quiz-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 80%;
    max-width: 500px;
}

#question {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

#options-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
}

button:hover {
    background-color: #0056b3;
}

.option-btn {
    background-color: #e0e0e0;
    color: black;
    border: 1px solid #ccc;
    padding: 0.75rem;
    border-radius: 5px;
    cursor: pointer;
    text-align: left;
}

.option-btn.correct {
    background-color: #28a745;
    color: white;
}

.option-btn.incorrect {
    background-color: #dc3545;
    color: white;
}

#result {
    margin-top: 1rem;
    font-weight: bold;
}