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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 30px 15px;
            min-height: 100vh;
        }

        h2 {
            text-align: center;
            margin-bottom: 40px;
            color: #333;
            font-size: 32px;
        }

        form {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .product-card1>img, .product-card2>img, .product-card3>img, .product-card4>img {
            width: 100%;
            /* height: 200px; */
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 15px;
        }
        .product-card1, .product-card2, .product-card3, .product-card4 {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .product-card1:hover, .product-card2:hover, .product-card3:hover, .product-card4:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        input {
            width: 100%;
            padding: 12px 15px;
            margin-bottom: 15px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            transition: border-color 0.3s ease;
        }

        input:focus {
            outline: none;
            border-color: #2d89ff;
            background-color: #f8fbff;
        }

        button {
            width: 100%;
            padding: 12px;
            background: linear-gradient(135deg, #2d89ff 0%, #1f6de7 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        button:hover {
            transform: scale(1.02);
            box-shadow: 0 4px 12px rgba(45, 137, 255, 0.4);
        }

        button:active {
            transform: scale(0.98);
        }

       /* mobile responsive */
        @media (max-width: 768px) {
            h2 {
                font-size: 24px;
                margin-bottom: 30px;
            }

            form {
                grid-template-columns: 1fr;
                gap: 15px;
            }

            .product-card1, .product-card2, .product-card3, .product-card4 {
                padding: 20px;
            }
        }

        @media (max-width: 480px) {
            body {
                padding: 15px;
            }

            h2 {
                font-size: 20px;
            }

            input {
                padding: 10px 12px;
                font-size: 13px;
            }

            button {
                padding: 10px;
                font-size: 14px;
            }
        }