body {
  background-image: url("mountains.jpg");
  background-size: cover;
  background-position: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  padding-top: 5vh;
}
#content {
  width: 100%;
  height: auto;
  font-size: 68%;
  background-color: #ffffffaa;
  display: block;
  margin: 0 auto;
  text-align: center;
  padding: 15px;
  box-shadow: 0 1px 5px #00000066;
  border: 1px solid #222;
  color: #222;
}
@media (min-width: 768px) {
  #content {
    font-size: 100%;
    width: 768px;
  }
}
hr {
  border-color: black;
  margin: 20px 0;
}