@layer reset, demo;

::view-transition {
  pointer-events: none;
}
::view-transition-group(*) {
  animation-duration: 1s;
}

.box {
  view-transition-name: box;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

#debug {
  position: fixed;
  opacity: 0.5;
  font-family: monospace;
  padding: 0.2rem;
  white-space: pre-wrap;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.9);
  overflow-y: auto;
}

@layer demo.support {
  .box {
    display: block;
    inline-size: 20vmin;
    block-size: 20vmin;
    aspect-ratio: 1;
    overflow: clip;
    background: dodgerblue;
    color: white;
    place-content: center;
    text-align: center;
    cursor: pointer;
  }

  body {
    display: grid;
    place-content: center;
    padding: 1em;
    gap: 1em;
    height: 100vh;
    margin: 0;
  }

  html {
    view-transition-name: none;
  }
}

@layer reset {
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  html,
  body {
    height: 100%;
  }
  html {
    font-family:
      system-ui,
      "Segoe UI",
      Roboto,
      Helvetica,
      Arial,
      sans-serif,
      "Apple Color Emoji",
      "Segoe UI Emoji",
      "Segoe UI Symbol";
  }
}