#container .col {
    display: flex;
    flex-direction: column;
}

#container .row {
    display: flex;
    flex-direction: row;
}

#canvas {
    border: 5px solid red;
}

#container {
    display: flex;
    flex-wrap: wrap;
}

#dropzone {
    width: 600px;
    height: 400px;
    border: 5px solid blue;
}

#dithered {
    width: 600px;
    height: 400px;
    border: 5px solid green;
}

#container img {
    object-fit: contain;
    width: 100%;
}