/* Кнопки 'Избранное' (favorite) */
.favorite-filter-btn, .favorite-question-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 1em;
    border: 1px solid var(--primary-color);
    background: transparent;
    color: var(--primary-color);
    border-radius: 4px;
    padding: 7px 14px;
    cursor: pointer;
    transition: background 0.18s, color 0.18s, border-color 0.18s;
}
.favorite-filter-btn .star-icon, .favorite-question-btn .star-icon {
    font-size: 1.2em;
    color: #ffc107;
    margin-right: 4px;
    transition: color 0.18s;
}
.favorite-filter-btn.active, .favorite-question-btn.active {
    background: var(--primary-color);
    color: var(--light-color);
    border-color: var(--primary-color);
}
.favorite-filter-btn.active .star-icon, .favorite-question-btn.active .star-icon {
    color: #fff700;
}
.favorite-filter-btn:hover, .favorite-question-btn:hover {
    background: var(--primary-color-dark, #0056b3);
    color: var(--light-color);
}