.sb-answer-option {
    border-color: #64748b;
    color: #0f172a;
    background: #fff;
    transition: background-color .12s ease, border-color .12s ease, color .12s ease, box-shadow .12s ease;
}

.sb-answer-option:hover {
    border-color: #0d6efd;
    background: #eff6ff;
    color: #0b1f3a;
}

.btn-check:focus + .sb-answer-option,
.btn-check:focus-visible + .sb-answer-option {
    border-color: #0d6efd;
    box-shadow: 0 0 0 .2rem rgba(13, 110, 253, .22);
}

.btn-check:checked + .sb-answer-option {
    background: #0d6efd;
    border-color: #0d6efd;
    color: #fff;
    box-shadow: 0 0 0 .2rem rgba(13, 110, 253, .16);
}