html {

  height: 100%;
  width: 100%;
  margin: 0;
  border: 0;
  padding: 0;
}

body {

  height: 100%;
  width: 100%;

  margin: 0;
  border: 0;
  padding: 0;

}


canvas {

  touch-action: none;

  width: 100%;
  max-height: 100%;

  padding: 0;
  margin: 0;
  border: 0;

  min-width: 0;
  min-height: 0;
}

#mainGrd {

    display: grid;
    width: 100%;
    height: 100%;
    grid-template-rows: 80px 1fr;
    grid-template-columns: 1fr;
    grid-row-gap: 8px;
    padding-top: 8px;
    padding-bottom: 0;

    justify-content: stretch;
    align-content: stretch;
    justify-items: stretch;
    align-items: stretch;
}

#bb {
  grid-row: 1;
  grid-column: 1;

  padding: 0;
  margin: 0;
  border: 0;
}

#cnvs {

  grid-row: 2;
  grid-column: 1;

  padding: 0;
  margin: 0;
  border: 0;


}