view-transitions-polyfill/dist/demo/demo-styles.css

A polyfill for the View Transitions API.

html {
  min-block-size: 100svb;
  color-scheme: light dark;
  color: white;
  background-color: hsl(219, 100%, 15%);
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    Roboto,
    Oxygen,
    Ubuntu,
    Cantarell,
    'Open Sans',
    'Helvetica Neue',
    sans-serif;
}
html,
body {
  margin: 0;
  overflow-x: clip;
}
header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-block: 0.5rem;
  padding-inline: 1rem;
  background-color: hsl(219, 100%, 37%);
  overflow-x: clip;
  flex-wrap: wrap;
}
header a {
  color: unset;
  text-decoration: unset;
  background-color: hsl(219, 100%, 15%);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
  flex-shrink: 0;
}
header a:hover {
  background-color: hsl(218, 100%, 5%);
}
header a:active {
  background-color: hsl(218, 100%, 0%);
}
main {
  padding: 2rem;
}
.other-page {
  color: unset;
  text-decoration: unset;
  background-color: hsl(219, 100%, 37%);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 0.5rem;
}
.other-page:hover {
  background-color: hsl(219, 100%, 27%);
}
body {
  display: flex;
  flex-direction: column;
  min-block-size: 100vh;
  min-block-size: 100svb;
}
main {
  padding: 2rem;
  flex: 1;
}
.page-2 {
  background-color: hsl(160, 100%, 18%);
}
h1 {
  margin-block-start: 0;
}
img,
video {
  height: auto;
}