html, body { height: 100%; margin: 0; }
body {
  background: #111;
  color: #fff;
  font: 300 16px/1 "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-align: center;
  overflow: hidden;
}
.background {
  position: fixed;
  inset: 0;
  margin: -5%;
  background: url("images/background.jpg") center / cover no-repeat;
  filter: blur(5px);
  z-index: -1;
}
main { max-width: 600px; margin: 0 auto; padding: 165px 16px 0; }
main p { margin: 1em 0; font-size: 48px; font-weight: 700; line-height: 1.2; }
footer { position: absolute; bottom: 0; left: 0; right: 0; padding: 10px 0 15px; }
a { color: #57baff; }