#under-construction-gate {
  display: none;
}

html.is-under-construction body {
  overflow: hidden;
  background: #fff;
}

html.is-under-construction body > *:not(#under-construction-gate) {
  display: none !important;
}

html.is-under-construction #under-construction-gate {
  display: grid;
  place-items: center;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 1.5rem;
}

html.is-under-construction #under-construction-gate img {
  display: block;
  width: min(640px, 86vw);
  height: auto;
}