body {
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
  border: 1px groove #333;
  border-radius: 10px;
  box-shadow: 9px 9px 16px 10px rgba(0, 0, 0, 0.2);
}

div {
    padding-left: 10px;
    padding-right: 10px;
}