html, body {
  height: 100%;
  margin: 0;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #000000; /* black background */
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.center-content img {
  max-width: 360px;
  height: auto;
}