html {
  background-color: #444444;
}
html, body {
  height: 100vh;
  margin: 0;
  padding: 0;
  overflow: hidden;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

body::after {
  content: "";
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 32px;
  background: url("/pattern.png") repeat-x;
}

.logo {
  width: 96px;
}