$tui-window-margin: 10px $tui-window-background: gray .tui-window width: calc(60% - $tui-window-margin * 2) height: calc(60% - $tui-window-margin * 2) position: absolute top: 20% left: 20% border: black double 5px &::before content: ' '; position: absolute top: -$tui-window-margin left: -$tui-window-margin width: calc(100% + $tui-window-margin * 2); height: calc(100% + $tui-window-margin * 2); background-color: $tui-window-background z-index: -1 .header position: absolute top: -$tui-window-margin width: 90% left: 5% display: flex flex-direction: row justify-content: space-between .buttons background-color: $tui-window-background display: flex flex-direction: row p margin: 0px padding: 0px padding-left: 5px padding-right: 5px display: block background-color: $tui-window-background