:root {
  color-scheme: dark;
  background: #06071d;
}

* { box-sizing: border-box; }

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  overscroll-behavior: none;
  background: radial-gradient(circle at 50% 20%, #252765 0, #0c1036 46%, #050619 100%);
}

body,
#game-shell,
#embed-html {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  touch-action: none;
}

canvas {
  display: block;
  width: min(100vw, 56.25vh) !important;
  height: min(177.7778vw, 100vh) !important;
  max-width: 540px;
  max-height: 960px;
  outline: none;
  touch-action: none;
  box-shadow: 0 0 60px rgba(82, 75, 255, 0.24);
}