body {
  background-color: black;
  background-image: url("bg.gif");
  background-repeat: repeat;
  color:white;
  font-family: Comic Sans MS;
}
div {
  background-color: #22C6F9;
  border-style: solid;
  border-color: #FB22F9;
  margin-left: auto;
  margin-right: auto;
  width:50vw;
  border-radius: 2em;
  padding: 1em;
}

@media screen and (max-width: 880px) {
    div { 
      width: 100vw;
      margin: 0px;
  }
}