#category-filter{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}#category-filter .cat-btn{padding:8px 16px;border:1px solid #ccc;background:#f7f7f7;cursor:pointer;border-radius:4px;transition:all 0.2s ease}#category-filter .cat-btn:hover{background:#eaeaea}#category-filter .cat-btn.active{background:#000;color:#fff;border-color:#000}