* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  background: #000;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.intro-img {
  display: block;
  max-width: 100%;
  max-height: 100vh;
  width: auto;
  height: auto;
  object-fit: contain;
}

.intro-mobile { display: none; }

@media (max-width: 768px) {
  .intro-desktop { display: none; }
  .intro-mobile { display: block; }
}