Custom layout using CSS Grid: targeting specific elements

Question

I need to reproduce this design using CSS Grid, and I've tried positioning specific grid elements to get the result, but without success.

This is what I have currently, I need to fix a few things but I want to get the structure right before that.

Attached code snippet:

.grid-container {
  display: grid;
  grid-template-columns: repeat(13, minmax(30px, auto));
  gap: 30px;
}

.grid-item {
  background-color: red;
  height: 50px;
  width: 50px;
}

<div class="grid-container">
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                
  <div class="grid-item"></div>                                                             <div class="grid-item"></div>                                        
</div>

I've tried using grid-template-rows to modify the layout without success, any suggestions?

Answer 1

.grid-container {
  display: grid;
  grid-template-columns: repeat(13, minmax(30px, auto));
  grid-template-rows: repeat(5, minmax(30px, auto));
  gap: 10px;
}

.grid-item {
  background-color: red;
  height: 50px;
  width: 50px;
}

.div1 {
  grid-area: 1 / 1 / 4 / 2;
  height: 100%;
}

.div38 {
  grid-area: 4 / 1 / 6 / 2;
  height: 100%;
}

.div39 {
  grid-area: 4 / 2 / 5 / 6;
  width: 100%;
}

.div40 {
  grid-area: 4 / 6 / 5 / 10;
  width: 100%;
}

.div41 {
  grid-area: 4 / 10 / 5 / 14;
  width: 100%;
}

.div42 {
  grid-area: 5 / 2 / 6 / 4;
  width: 100%;
}

.div43 {
  grid-area: 5 / 4 / 6 / 6;
  width: 100%;
}

.div44 {
  grid-area: 5 / 6 / 6 / 8;
  width: 100%;
}

.div45 {
  grid-area: 5 / 8 / 6 / 10;
  width: 100%;
}

.div46 {
  grid-area: 5 / 10 / 6 / 12;
  width: 100%;
}

.div47 {
  grid-area: 5 / 12 / 6 / 14;
  width: 100%;
}