.filter-group {
    margin-bottom: 10px;
    border-bottom: 1px solid #334155;
    padding-bottom: 10px;
}

.filter-group summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
}

.filter-group summary::-webkit-details-marker {
    display: none;
}

.filter-group summary h4 {
    margin: 0;
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.filter-group summary h4::after {
    content: '▶';
    font-size: 0.8em;
    transition: transform 0.2s;
}

.filter-group[open] summary h4::after {
    transform: rotate(90deg);
}

.filter-content {
    padding-top: 10px;
    padding-left: 5px;
}

.filter-subgroup {
    margin: 5px 0 5px 10px;
}

.filter-subgroup summary {
    font-size: 0.9em;
    color: white;
    padding: 2px 0;
    font-weight: 500;
}

.filter-subcontent {
    margin-left: 15px;
    border-left: 1px solid #334155;
    padding-left: 10px;
}