.jumbotron {
    max-width: 1200px;
    margin: auto;
    padding: 20px 10px;
}

#content {
    display: block;
    overflow: hidden;
    padding: 20px;
}

#card {
    float: left;
    position: relative;
    border: 1px solid black;
    margin-right: 20px;
    padding: 25px;
    max-width: 200px;
    overflow: hidden;
}

#card .u-photo {
    aspect-ratio: 1;
    width: 150px;
    height: auto;
    object-fit: contain;
}

#card .p-nickname {
    font-weight: bold;
}

@media (max-width: 576px) {
    #card {
        float: none;
        margin: auto;
        padding: 5px;
    }
}