nhdesigngen 1.1.3

table, th, td {
    border: 1px solid black;
    border-collapse: collapse;
}
th, td {
    width: 2em;
    height: 2em;
    text-align: center;
}

input.number {
    width: 2em;
}

.canvascontainer {
    resize: horizontal;
    overflow: auto;
    width: 15em;
}

canvas {
    image-rendering: optimizeSpeed;
    image-rendering: -moz-crisp-edges;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: -o-crisp-edges;
    image-rendering: pixelated;
    -ms-interpolation-mode: nearest-neighbor;
    width: 100%;
    height: auto;
    object-fit: contain;
}