@-moz-keyframes opening {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-webkit-keyframes opening {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-o-keyframes opening {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes opening {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-moz-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-o-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
body {
  background: #fff;
  font-family: Arial, sans-serif;
  cursor: default;
}
#system-message {
  display: block;
  position: fixed;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: #eee;
}
#system-message div {
  position: absolute;
  left: 50%;
  top: 50%;
  padding: 3rem;
  transform: translate(-50%, -50%);
  background-color: #fff;
  box-shadow: 0.5rem 0.5rem 3rem rgba(0,0,0,0.75);
  color: #000;
  text-align: center;
  font-size: 1.25rem;
}
#system-message div p {
  margin: 0 0 1rem 0;
  padding: 0;
  color: rgba(0,0,0,0.5);
}
#system-message div p:last-child {
  margin-bottom: 0;
}
#system-message div p strong {
  color: #000;
}
#system-message div a {
  display: inline-block;
  margin: 0.5rem 0 0 0;
  padding: 0.5rem 0.7rem;
  font-size: 1rem;
  background: rgba(0,0,0,0.08);
  color: #000;
  text-decoration: none;
  text-transform: uppercase;
  font-weight: bold;
  opacity: 0.7;
  transition: opacity 0.125s;
}
#system-message div a:hover {
  opacity: 1;
}
#demo {
  display: flex;
  position: fixed;
  align-items: center;
  justify-content: center;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  background: #222;
}
#demo > div {
  position: relative;
  padding: 3vw;
  background: #fff;
}
#demo > div > img {
  display: block;
  margin: 0 auto;
  max-width: 94vw;
  width: 200px;
}
#demo > div > strong {
  display: block;
  margin: 2rem 0;
  text-transform: uppercase;
  text-align: center;
  font-weight: bold;
  font-size: 1.5rem;
}
#demo > div > ul,
#demo > div > ul > li {
  margin: 0;
  padding: 0;
  list-style: none;
}
#demo > div > ul > li > a {
  display: block;
  margin: 0 0 0.5rem 0;
  padding: 0.5rem;
  border: 3px solid #000;
  color: #000;
  text-decoration: none;
  text-align: center;
}
#demo > div > ul > li > a:hover {
  background: #000;
  color: #fff;
}
#demo > div > ul > li:last-child > a {
  margin-bottom: 0;
}