/** Shopify CDN: Minification failed

Line 19:0 Unexpected "<"
Line 43:0 Unexpected "<"

**/
canvas#dd-gameCanvas {
  display: block;
  margin: 0 auto;
  border: 2px solid #000;
  width: 100%;
  max-width: 480px;
  height: auto;
  background: url(your-background.jpg) no-repeat center center;
  background-size: cover;
  touch-action: none;
}

<style>
  #dd-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 400px;
    height: 600px;
    background: rgba(20, 20, 20, 0.9);
    color: #fff;
    font-size: 1.5rem;
    font-family: 'Roboto Mono', monospace;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 999;
    text-align: center;
    padding: 20px;
  }

  #dd-countdown {
    font-size: 3rem;
    margin-top: 1rem;
  }
</style>