body {
    background-color: #f8f9fa;
    color: #333;
}

.container {
    max-width: 800px;
}

#question-container .card-body {
    padding: 1.5rem;
}

.option-btn {
    text-align: left;
    padding: 10px 15px;
    margin-bottom: 8px;
    border-radius: 4px;
    width: 100%;
    background-color: #f1f3f5;
    border: 1px solid #dee2e6;
    transition: all 0.2s;
}

.option-btn:hover {
    background-color: #e9ecef;
    border-color: #ced4da;
}

.option-btn.selected {
    background-color: #cfe2ff;
    border-color: #9ec5fe;
}

.option-btn.correct {
    background-color: #d1e7dd;
    border-color: #a3cfbb;
}

.option-btn.incorrect {
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.option-letter {
    font-weight: bold;
    margin-right: 10px;
    display: inline-block;
    width: 25px;
}

.question-header {
    margin-bottom: 15px;
}

#feedback-container .alert-success {
    background-color: #d1e7dd;
    color: #0f5132;
    border-color: #a3cfbb;
}

#feedback-container .alert-danger {
    background-color: #f8d7da;
    color: #842029;
    border-color: #f5c2c7;
}

.special-option {
    background-color: #f8f9fa;
    border-color: #ced4da;
    margin-top: 0.5rem;
}

.special-option:hover {
    background-color: #e2e6ea;
    border-color: #bdc4cc;
}

.special-options-separator {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    border-top: 1px dashed #dee2e6;
}