style.css

html {
  background: url("http://www.planwallpaper.com/static/images/b807c2282ab0a491bd5c5c1051c6d312_rP0kQjJ.jpg") no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  margin: 0;
}

body {
  padding: 10px 160px 10px 160px;
}


h1 {
  text-align: center;
  padding-top: 30px;
}

p {
  text-align: center;
  margin-top: 40px;
}

a {
  background-color: #14213D;
  color: #FFF;
  box-sizing: border-box;
  font-size: 15px;
  padding: 5px;
  background-image: -webkit-linear-gradient(purple, turquoise);
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-right: -50%;
  transform: translate(-50%, -50%)
}


footer {
  background-color: #000;
  overflow-y: auto;
  position: fixed;
  bottom: 0px;
  left: 0px;
  width: 100%;
  z-index: 1000;
  text-align: center;
  color: #fff;
}

.banner {
  background-color: rgba(188, 198, 204, 0.9);
  padding-bottom: 30%;
  border-radius: 5px;
}