Create grid with title and five items

HTML

<section class="container">
  <div class="title">title</div>
  <div class="main">main</div>  
  <!-- arbitrary number of "items" loaded dynamically -->
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <div class="side">item</div>
  <!-- here I am manually specifying which ones are full width vs half width, I don't want to need to do this. -->
  <div class="item">item</div>
  <div class="item">item</div>
</section>

CSS

.container {
  height: 90vh;
  max-height: 90vh;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-auto-rows: 1fr;
  grid-gap: 10px;
  grid-template-areas:
    "title title"
    "main side"
    "main side"
    "main side"
    "item item"
    "item item";
}


.container > * {
  color: white; 
  font: arial;
  font-size: 14px;
  padding: 10px;
  margin: 0;
  border: 1px solid black;
}

.title {
  grid-area: title;
  background: #808;
}

.main { 
  grid-area: main;
  background: #040;
  aspect-ratio: 1;
  width: 60vh;
}

.side, .item {
  height: 5vh;
  grid-column: -2 / -1;
  background: red;
}

.item {
  grid-column: span 2;
}