.grid-stack > .grid-stack-item > .grid-stack-item-content {
    background-color: #fff;
    border: 1px solid #e3e3e3;
    border-radius: 4px;
    /*padding: 1rem;*/
}

#chart_container {
    width: 200px;
    height: 200px;
    border: 1px solid #ddd;
    padding: 1px;
    border-radius: 4px;
}