:root {
            --bg-color: #0f172a;
            --card-bg: #1e293b;
            --text-color: #f8fafc;
            --text-muted: #94a3b8;
            --primary: #3b82f6;
            /* Blue */
            --accent: #22c55e;
            /* Green */
            --danger: #ef4444;
            --border: #334155;
            --glass: rgba(30, 41, 59, 0.7);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Inter', sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            display: flex;
            height: 100vh;
            overflow: hidden;
        }

        /* Main Content */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            height: 100%;
            overflow-y: auto;
            position: relative;
        }

        header {
            position: sticky;
            top: 0;
            z-index: 10;
            background: var(--glass);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: space-between;
            align-items: center;
        }

        h1 {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: -0.025em;
            white-space: nowrap;
            margin-right: auto;
        }

        .controls {
            display: flex;
            gap: 1rem;
            flex: 1;
            align-items: center;
            justify-content: flex-end;
            min-width: 300px;
        }

        .search-bar {
            position: relative;
            flex: 1;
            max-width: 300px;
        }

        .search-bar input {
            width: 100%;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.75rem 1.5rem;
            color: white;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.2s;
        }

        .search-bar input:focus {
            border-color: var(--primary);
        }

        select {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.75rem 1rem;
            color: white;
            font-size: 0.95rem;
            outline: none;
            cursor: pointer;
        }

        select:focus {
            border-color: var(--primary);
        }

        .products-grid {
            padding: 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 1.5rem;
        }

        /* Product Card */
        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            flex-direction: column;
            position: relative;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
            border-color: var(--primary);
        }

        .card-img {
            width: 100%;
            height: 180px;
            object-fit: contain;
            background: white;
            padding: 1rem;
        }

        .card-body {
            padding: 1rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-title {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-unit {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }

        .card-footer {
            margin-top: auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .card-price {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent);
        }

        .btn-add {
            background: var(--primary);
            color: white;
            border: none;
            border-radius: 8px;
            padding: 0.5rem 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: opacity 0.2s;
        }

        .btn-add:hover {
            opacity: 0.9;
        }

        /* Basket Sidebar */
        .basket-sidebar {
            width: 380px;
            background: var(--card-bg);
            border-left: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            height: 100%;
            transition: transform 0.3s ease;
        }

        .basket-header {
            padding: 1.5rem;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .basket-items {
            flex: 1;
            overflow-y: auto;
            padding: 1rem;
        }

        .basket-item {
            display: flex;
            align-items: center;
            padding: 0.75rem;
            margin-bottom: 0.5rem;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 8px;
            gap: 0.75rem;
        }

        .basket-item img {
            width: 48px;
            height: 48px;
            object-fit: contain;
            background: white;
            border-radius: 4px;
        }

        .basket-item-info {
            flex: 1;
            overflow: hidden;
        }

        .basket-item-title {
            font-size: 0.9rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .basket-item-price {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .qty-control {
            display: flex;
            align-items: center;
            background: var(--bg-color);
            border-radius: 6px;
            padding: 2px;
        }

        .qty-btn {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--text-color);
            cursor: pointer;
        }

        .qty-val {
            font-size: 0.9rem;
            padding: 0 6px;
            min-width: 20px;
            text-align: center;
        }

        .basket-footer {
            padding: 1.5rem;
            border-top: 1px solid var(--border);
            background: var(--card-bg);
        }

        .total-row {
            display: flex;
            justify-content: space-between;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .client-form input {
            width: 100%;
            background: var(--bg-color);
            border: 1px solid var(--border);
            padding: 0.75rem;
            border-radius: 8px;
            color: white;
            margin-bottom: 0.75rem;
            font-family: inherit;
        }

        .btn-checkout {
            width: 100%;
            background: var(--accent);
            color: white;
            border: none;
            padding: 1rem;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            transition: transform 0.1s;
        }

        .btn-checkout:active {
            transform: scale(0.98);
        }

        .btn-checkout:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        /* Toast */
        .toast {
            position: fixed;
            bottom: 2rem;
            left: 50%;
            transform: translateX(-50%) translateY(100px);
            background: var(--primary);
            color: white;
            padding: 0.75rem 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            opacity: 0;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            z-index: 100;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        }

        .toast.show {
            opacity: 1;
            transform: translateX(-50%) translateY(0);
        }

        /* Mobile Responsive */
        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }

            .basket-sidebar {
                position: fixed;
                bottom: 0;
                left: 0;
                width: 100%;
                height: auto;
                max-height: 80vh;
                border-left: none;
                border-top: 1px solid var(--border);
                transform: translateY(100%);
                z-index: 50;
                box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
            }

            .basket-sidebar.open {
                transform: translateY(0);
            }

            .main-content {
                padding-bottom: 80px;
            }

            /* Space for toggle bar */

            .mobile-toggle {
                display: flex;
                position: fixed;
                bottom: 1rem;
                right: 1rem;
                left: 1rem;
                background: var(--primary);
                padding: 1rem;
                border-radius: 12px;
                justify-content: space-between;
                align-items: center;
                color: white;
                font-weight: 700;
                cursor: pointer;
                box-shadow: 0 10px 25px rgba(59, 130, 246, 0.4);
                z-index: 40;
            }

            .mobile-toggle span {
                pointer-events: none;
            }
        }

        @media (min-width: 769px) {
            .mobile-toggle {
                display: none;
            }
        }