:root {
  --offline-color: #5c5c5c;
  --online-color: pink;
  --offline-text-color: rgb(26, 17, 56);
  --online-text-color: rgb(26, 17, 56);
}

@media screen and (prefers-color-scheme: light) {
  :root {
    --offline-color: white;
    --online-color: pink;
    --offline-text-color: rgb(26, 17, 56);
    --online-text-color: rgb(26, 17, 56);
  }
}

@keyframes wiggle {
  0% {
    transform: rotate(0deg);
  }
  80% {
    transform: rotate(0deg);
  }
  85% {
    transform: rotate(5deg);
  }
  95% {
    transform: rotate(-5deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

a {
  text-decoration: none;
  font-size: 10vw;
}

body.online > a {
  text-decoration: underline;
  animation: wiggle 2.5s infinite;
}

a,
a:visited,
a:hover,
a:active {
  color: inherit;
  display: block;
}

body {
  color: var(--offline-text-color);
  -webkit-transition: background-color 1000ms linear;
  -ms-transition: background-color 1000ms linear;
  transition: background-color 1000ms linear;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

body.offline {
  background-color: var(--offline-color);
  color: var(--offline-text-color);
}

body.online {
  background-color: var(--online-color);
  color: var(--online-text-color);
}