body {
    margin: 0; 
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background-color: #666666
}

#scribble-input {
  width: 1000px;
  box-sizing: border-box;
  /* border:10px solid black; */
  padding: 10px;
  font-size: 16px;
}

canvas {
  /* border-image-slice: 42 42 42 42;
  border-image-width: 42px 42px 42px 42px;
  border-image-outset: 0px 0px 0px 0px;
  border-image-repeat: round round;
  border-image-source: url("https://mdn.github.io/css-examples/tools/border-image-generator/border-image-6.svg");
  border-style: solid; */
}