* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "sans";
}
@font-face {
  font-family: "sans";
  src: url(font/sans.ttf);
}
html,
body {
  height: 100%;
}
body {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #19172e;
}
h2 {
  position: absolute;
  top: 0;
  padding-top: 100px;
  color: white;
  font-size: 2rem;
  text-align: center;
}
footer {
  background: #673392;
  text-align: center;
  font-size: 0.8rem;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin-bottom: 0;
  padding: 5px;
  line-height: 3vh;
}

footer a:visited {
  color: inherit;
}
#qr {
  position: relative;
}
#qr::before {
  content: "";
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 36%;
  height: 36%;
  border-radius: 50%;
  /* background: url(/photo/img.png) no-repeat center;
    background-size: cover; */
}
#qr img {
  background: #fff; /* White background inside existing border */
  display: block;
}