.app
    position: absolute
    width: 99%
    height: 99%

.actionButton
    position: fixed
    right: 1em
    bottom: 1em

body
    margin: 0
    padding: 0

.app
    position: absolute
    height: 100%

.actionButton
    position: fixed
    right: 1em
    bottom: 1em

Make app fill whole window
Make app fill whole window
