body {
  background-color:#6ab04c;
  box-sizing: border-box;
  height: calc(100vh - 20px);
  padding: 25px;
}

svg {
  display: block;
  width: 100%;
  height: 100%;
  background-color: #30336b;
}
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; }
svg { display: block; touch-action: none; }