body {
  background-color: #DFD;
}

canvas {
    margin-top : 2rem;
    margin-right : 2rem;
    border: 0.1rem solid #000;
    touch-action: none;
}

.preview {
    width : 2.4 rem;
    height : 1.2 rem;
    border: 0.2rem solid #CA0;
}

.configs {
    padding : 1rem;
    margin-top : 1rem;
    background-color: #EEE;
    border: 0.2rem solid #000;
}

.side {
    display : flex;
    flex-wrap: wrap;
}

.sticky {
    position: sticky;
    top: 10px;
}

td {
    width : 1.2 rem;
    height : 1.2 rem;
    text-align: center;
    border: 0.1rem solid #000;
}

td.selected {
    border : 0.1rem solid #CA0;
}

h3,h4,ul {
     margin: 0px;
}