/* ================================
   Easy settings
   ================================ */

:root {
  /*
    Image size.
    This is 75% of 750px.
    Change this value if you want the image larger or smaller.
  */
  --image-width: 562.5px;

  /*
    Fade-in speed.
    The page now fades in immediately without checking browser focus.
  */
  --image-fade-duration: 3s;
}

/* ================================
   Page layout
   ================================ */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: Arial, sans-serif;
  overflow: hidden;
}

.stage {
  position: relative;
  width: min(var(--image-width), 95vw);

  /*
    Instant page-start fade-in.
    No focus check and no "Click to focus" prompt.
  */
  opacity: 0;
  animation: fadeInStage var(--image-fade-duration) ease forwards;
}

.main-image {
  display: block;
  width: 100%;
  height: auto;
  user-select: none;
  pointer-events: none;
}

@keyframes fadeInStage {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}