body {
  background-color: #505050;
  height: 100%;
}

html {
  height: 100%;
}

* {
  margin: 0;
  padding: 0;
}
.imgbox {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}
.center-fit {
  max-width: 100%;
  max-height: 100vh;
  margin: auto;
}

.back {
  position: fixed;
  margin: 2%;
}

a {
  text-decoration: none !important;
  font-size: 8em;
  color: #969696;
}