css

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

body {
    font-family: Arial, sans-serif;
}

header {
    display: flex;
    justify-content: space-between;
    padding: 20px;
    background-color: #333;
    color: #fff;
}

.product-list {
    display: flex;
    flex-wrap: wrap;
    padding: 20px;
    gap: 20px;
}

.product {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 20px;
    width: 100%;
    max-width: 200px;
    text-align: center;
}

.product img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

button {
    background-color: #333;
    color: #fff;
    padding: 10px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

button:hover {
    background-color: #555;
}

/* Modal styling */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: #fff;
    margin: 15% auto;
    padding: 20px;
    width: 90%;
    max-width: 500px;
    border-radius: 8px;
}

.close {
    float: right;
    font-size: 20px;
    cursor: pointer;
}

/* Responsive layout */
@media (min-width: 600px) {
    .product-list {
        justify-content: space-between;
    }

    .product {
        width: calc(50% - 20px);
    }
}

@media (min-width: 900px) {
    .product {
        width: calc(33.333% - 20px);
    }
}