.sidebar {
        background: white;
        padding: 0;
        border-radius: 10px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        position: sticky;
        top: 100px;
        height: fit-content;
        overflow: hidden;
    }

    .category-header {
        background: linear-gradient(to right, #2980b9, #0EA765);
        color: white;
        padding: 15px 20px;
        font-weight: 600;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        transition: all 0.3s ease;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .category-header:hover {
        background: linear-gradient(to right, #2980b9, #2573a7);
    }

    .category-header i {
        transition: transform 0.3s ease;
    }

    .category-header[aria-expanded="true"] i {
        transform: rotate(90deg);
    }

    .subcategory {
        background: #f8f9fa;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }

    .category.open .subcategory {
        max-height: 500px;
    }

    .nested-category {
        border-bottom: 1px solid #eee;
    }

    .nested-header {
        padding: 12px 20px 12px 30px;
        font-weight: 500;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        color: #2c3e50;
        background: white;
        transition: all 0.3s ease;
    }

    .nested-header:hover {
        background: #ffcd299f;

        color: #333333;
    }

    .nested-header i {
        font-size: 12px;
        transition: transform 0.3s ease;
    }

    .nested-header[aria-expanded="true"] i {
        transform: rotate(90deg);
    }

    .nested-sub {
        background: #f9f9f9;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nested-category.open .nested-sub {
        max-height: 200px;
    }

    .listing {
        padding: 10px 20px 10px 40px;
        margin: 0;
        color: #555;
        transition: all 0.3s ease;
        border-left: 3px solid transparent;
        display: block;
        text-decoration: none;
        font-weight: 500;
        border-bottom: 1px solid #ddd;
    }

    .listing:hover {
        background: #ffcd299f;
        color: #333333;
        border-left: 3px solid #FFCC29;
        padding-left: 37px;
    }

    .category:last-child {
        border-bottom: none;
    }

    .badge-new {
        background: #e74c3c;
        color: white;
        font-size: 10px;
        padding: 3px 8px;
        border-radius: 10px;
        margin-left: 8px;
    }