html, 
body {
  height: 100%;
}

.full {
  margin: 0;
  position: relative;
  min-height: 100vh;
  background: url("https://leonochiai.com/title.jpg")
    center / cover;
}

img {
  height: 100vh;
  width: auto;
  display: block;
  vertical-align: top;
  border: 0;
  padding: 0;
  margin: 0;
  
}