body {
  font-family: sans-serif; }
  body .background {
    fill: #fefefe; }
  body line {
    stroke: #ddd;
    opacity: 0.8; }
  body svg {
    font: 10px sans-serif; }
  body text {
    display: block;
    white-space: nowrap; }
    body text.active {
      fill: red;
      font-size: 20px; }
  body #container {
    padding: 5vw;
    display: grid;
    grid-template-rows: 15vw 70vw;
    grid-template-columns: 15vw 70vw; }
    body #container #w {
      grid-row: 2 / 3;
      grid-column: 1 / 2; }
    body #container #h {
      grid-row: 1 / 2;
      grid-column: 2 / 3; }
    body #container #matrix {
      grid-row: 2 / 3;
      grid-column: 2 / 3; }