article img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
}
section {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 20px;
    padding-bottom: 20px;
}
header {
    text-align: center;
    margin-bottom: 30px;
    background-color: #eeeeee;
    padding: 30px 20px;
    text-align: center;
    border-bottom: 1px solid #dddddd;
}
footer {
    text-align: right;
    padding: 15px;
    background-color: #eeeeee;
    padding: 15px;
    text-align: right;
    border-top: 1px solid #dddddd;
    font-size: 14px;
}
body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f9f9f9;
    color: #333333;
}
article {
    background-color: #ffffff;
    border: 1px solid #dddddd;
    padding: 15px;
    border-radius: 6px;
}

@media (max-width: 768px) {

    section {
        grid-template-columns: 1fr;
    }

}