:root {
  --gradient: linear-gradient(
    45deg,
    #fff,
    #b3f6d8,
    #20bf55,
    #ffc75f,
    #52a7c1,
    #0abcf9
  );
}

body {
  background-image: var(--gradient);
  background-size: 400%;
  animation: bg-animation 20s infinite alternate;
}

@keyframes bg-animation {
  0% {
    background-position: left;
  }
  100% {
    background-position: right;
  }
}

img {
  max-inline-size: 100%;
  block-size: auto;
}

#page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  width: 100%;
}