.btn {
    border-radius: 0;
}

#question {
    font-size: 1.5rem;
    font-weight: bold;
}

#choices {
    margin-top: 1rem;
    margin-bottom: 1rem;
}

#score {
    font-size: 1.8rem;
    font-weight: bold;
    padding: 30px;
    text-align: center;
}

#score .text-primary {
    font-size: 2.5rem;
}