.container {
    display: grid;
    grid-template-columns: auto auto auto;
}


.thumbnail { width:250px;
    height: 250px;
    border: #b3261fb8;
    border-style: double;
}

.thumbnail-img { max-width:250px;
    max-height: 250px;
    margin: auto;
    display: block;
}


.chapdiv {
    width: 50%;
    float: right;
    background-image: url(/assets/img/bg.png);
    background-repeat: no-repeat;
    background-size: auto 100%;
}