position

width, background-image

by Wentz Wu

HTML

<div id="page">
  aa
</div>

CSS

body {
  margin: 0;
  padding: 20px;
  border: 1px solid red;
  height: 100vh;
  position: relative;
  -webkit-box-sizing: border-box;
  background-image: url(http://amicliens.com/images/amicliens_QR.jpg);  
  background-repeat: no-repeat;
  background-position: right 0 bottom 50px;
  background-size: 50% 50%;
  
}

#page {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  border: 1px solid black;
  background-color: lime;
}