html {
  height: 100%;
}
body {
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  background-image: url("image/fond-site.jpg");
  background-size: cover;
  margin: 0;
}

#cube {
  background-color: oklch(0.5682 0.2245 26);
  width: 30%;
  height: 30%;
  border: 1px black solid;
}

p {
  text-align: center;
  width: 70%;
  font-size: larger;
  font-weight: bold;
}