body, html {
  margin: 0; 
  padding: 0;
  width:  100%; 
  height: 100%; 
}

.node{
  position: relative;
  width: 100%
  height: 100%
  display: flex; 
  overflow: hidden; 
  border: 1px solid #eee;
  cursor: pointer; 
}

.child{
  flex: 1;
  border: 1px solid #ddd; 

}