I'm trying to create a layout similar to this:
+-------------------------+ 
|      |        2         |
|      | +----+---------+ |
|      | |    |         | |
|   1  | |  4 |    5    | |
|      | |    |         | |
|      | +--------------+ |
|      | |      6       | |
|      | +--------------+ |
+-------------------------+
1: Menu
2: Container
3: (removed toolbar for simplicity)
4, 5, 6: Nested layout
The html is organized this way
<div class="mainapp">
  <div class="menu">
  </div>
  <div class="container">
    <div class="childlayout">
      <div class="topleft"></div>
      <div class="topright"></div>
      <div class="bottom"></div>
    </div>
  </div>
</div>
So far, my CSS looks like this:
.mainapp {
  position: relative; 
  width: 100%;
  height: 100%;
}
.menu {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 200px;
}
.container {
  position: absolute;
  left: 200px;
  top: 0;
  bottom: 0;
  right: 0;      
}
.childlayout {
  // here is the problem
  // this shuld be a 100% width and 100% height
  // RELATIVE to parent
}
.topleft {
   position: absolute;
   left: 0;
   top: 0;
   width: 50%;
   height: 50%;
}
.topright {
   position: absolute;
   left: 50%;
   top: 0;
   right: 0;
   height: 50%;
}
.bottom {
   position: absolute;
   left: 0;
   top: 50%;
   right: 0;
   bottom: 0;
}
As you can see in the CSS, the childlayout class must be position: relative to allow child position: absolute. I need all these divs to be percent based because the "app" can be resized on the fly, and I want everything to adapt to the browser's window size.
Also, I would preffer this to be all CSS without jQuery/JavaScript (of course, if ther's no solution I can use these).
I can accept a solution based on Flex Layout also.
Can someone help me with this?.
 
     
     
    