#my-canvas{
    width:  800px;
    height: 800px;
    border: 5px solid black;
}

table {
    width: 500px;
}

th, td {
    width: 250px;
    border-bottom: 1px solid #ddd;
}

button {
    width: 250px;
    height: 50px;
    margin: 0px 25px 0px 25px;
}

#parent {
  display: flex;
}

#side {
  flex: 1;
  margin-left: 20px;
}

a{
    display: block;
    margin: 5px;
}

pre{
    margin-top: 10px !important;
}