img {
}

body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100vh;
  background: #333;
  /* grid from Muhammad Irfan */
  /* https://codepen.io/naprirfan/pen/xEvRae */
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.3) 0.1em, transparent 0.1em),
    linear-gradient(90deg, rgba(255, 255, 255, 0.3) 1px, transparent 1px);
  background-size: 100px 100px;
}