Hi Syamsu, did you try to use position? set parent as relative and child as absolute passing the exactly place you want the element to be
Eg:.
#parentDiv { position:relative; }
#childDiv { position:absolute; left:50px; top:20px; }
Here you can find some explanation about position:
https://dzone.com/articles/css-position-relative-vs-position-absolute
https://css-tricks.com/almanac/properties/p/position/
Hope I could help you
Cheers,
Carlos Lessa