* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: #18202a;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.shell {
  display: grid;
  place-items: center;
  width: 100vw;
  height: 100vh;
  padding: 16px;
}

#game {
  width: min(100vw - 32px, 960px);
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  border: 2px solid #edf5ff;
  background: #79b7ed;
  cursor: crosshair;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  touch-action: none;
}