body {
    background: #f6f7f9;
}

.page-shell {
    max-width: 1120px;
}

.question-block {
    border: 1px solid #dee2e6;
    border-radius: 8px;
    background: #fff;
}

.option-row {
    border: 1px solid #e9ecef;
    border-radius: 6px;
    padding: 10px 12px;
}

.option-correct {
    border-color: #198754;
    background: #eaf6ef;
}

.option-wrong {
    border-color: #dc3545;
    background: #fdecef;
}

.prompt-box {
    min-height: 220px;
    font-family: Consolas, Monaco, monospace;
}

.json-box {
    min-height: 430px;
    font-family: Consolas, Monaco, monospace;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
}