:root {
        --accent: #000;
        --border: #ececec;
        --text-muted: #777;
        --bg-white: #ffffff;
        --radius: 4px;
    }

    /* Desktop Layout */
    .shop-container {  max-width: var(--max-width); width: 96%; margin: 0 auto; }
    .shop-layout { display: grid; grid-template-columns: 240px 1fr; gap: 20px; padding: 40px 0; }

    /* Hide Mobile-only elements on Desktop */
    .mobile-filter-bar, .mobile-sidebar-header, .close-filters-btn { display: none; }

    /* Sidebar Styling (Sticky Desktop) */
    .shop-filters { position: sticky; top: 40px; height: fit-content; }
    .filter-group { margin-bottom: 25px; border-bottom: 1px solid var(--border); padding-bottom: 20px; }
    .filter-group:last-child { border: none; }
    .filter-group h4 { font-size: 12px; text-transform: uppercase; letter-spacing: 1.2px; margin-bottom: 15px; font-weight: 700; color: #111; }
    
    .filter-label { display: flex; align-items: center; gap: 10px; font-size: 14px; color: #555; margin-bottom: 10px; cursor: pointer; transition: 0.2s; }
    .filter-label:hover { color: var(--accent); }

    /* Grid System */
    .products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

    /* Toast Notification */
    .cart-notification { position: fixed; bottom: 30px; right: 30px; background: #000; color: #fff; padding: 12px 25px; font-size: 13px; border-radius: 50px; transform: translateY(120px); opacity: 0; transition: 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28); z-index: 9999; }
    .cart-notification.is-active { transform: translateY(0); opacity: 1; }

    /* --- RESPONSIVE --- */

    @media (max-width: 1024px) {
        .products-grid { grid-template-columns: repeat(3, 1fr); }
        .shop-layout { gap: 30px; }
    }

    @media (max-width: 768px) {
        .mobile-filter-bar { display: flex; position: sticky; top: 0; background: var(--bg-white); z-index: 99; padding: 15px 0; border-bottom: 1px solid var(--border); justify-content: space-between; align-items: center; }
        .mobile-count-title { font-weight: 700; font-size: 14px; }
        .filter-trigger { background: var(--accent); color: #fff; border: none; padding: 8px 16px; font-size: 11px; font-weight: 700; border-radius: var(--radius); cursor: pointer; }

        .shop-layout { grid-template-columns: 1fr; padding: 10px 0; }
        
        /* Slide-out Sidebar for Mobile */
        .shop-filters {
            position: fixed; top: 0; left: -100%; width: 300px; height: 100%;
            background: #fff; z-index: 1001; padding: 25px;
            box-shadow: 20px 0 50px rgba(0,0,0,0.15); transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1); 
            overflow-y: auto; display: block;
        }
        .shop-filters.active { left: 0; }

        /* Sidebar Header on Mobile */
        .mobile-sidebar-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 30px; padding-bottom: 15px; border-bottom: 2px solid #000; }
        .mobile-sidebar-header span { font-weight: 800; text-transform: uppercase; font-size: 16px; }
        .close-filters-btn { display: block; font-size: 28px; background: none; border: none; cursor: pointer; line-height: 1; padding: 5px; }
        
        /* 2-Column Product Grid */
        .products-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }

        .filter-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1000; opacity: 0; pointer-events: none; transition: 0.3s; }
        .filter-overlay.active { opacity: 1; pointer-events: all; }
    }