:root {
  color-scheme: dark;
  background: #031323;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

main {
  min-height: 100vh;
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 16px;
}

.sign {
  display: block;
  width: 100%;
  max-width: 1672px;
}

.sign img {
  /* Fit the complete poster, including its border, to both viewport dimensions. */
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: calc(100vh - 32px);
  max-height: calc(100svh - 32px);
  margin-inline: auto;
  object-fit: contain;
}

@media (max-width: 767px) {
  :root {
    background: #011426;
  }
}