I've been struggling to create this specific layout using CSS Grid. It needs to be fixed and I've come to create the grid container being 1100px wide including gutters and siding but the gaps can be ignored for sake of just making the layout.
Basically it's two columns. One is 75% and the other is 25%. There are six grid areas. What stumps me is in regards to the varying row heights and if this is a case where implicit grid comes into place or not.
I've designed what I'd like the layout to be including the fixed sizes. The gaps are all 20px except for the outside left and right which are 40px but again this can be ignore for sake of creating the layout.
The markup is as follows:
<div id="page-wrapper">
<div class="grid-container">
<div class="1"></div>
<div class="2"></div>
<div class="3"></div>
<div class="4"></div>
<div class="5"></div>
<div class="6"></div>
</div>
</div>
I've been trying to explicitly define each area to no avail. Perhaps I'm missing something. Here's the layout design
Any help or point in the right direction regarding the styles would be much appreciated! Thanks.

