html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  padding: 10px; 
  border: 10px solid; 
}

body.fullscreen {
  margin: 0;
  padding: 0;
  border: 0;
  width: 100vw;
  height: 100vh;
}

#sketch-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  position: relative;
  box-sizing: border-box;
}

#sketch-container.fullscreen {
  padding: 0;
  border: 0;
  width: 100vw;
  height: 100vh;
  position: absolute; 
}

canvas {
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  position: absolute;
  margin: 0;
  padding: 0;
}