CSS Calc Viewport Units Workaround?

Question

From what I\'ve seen in other answers, CSS viewport units can\'t be used in calc() statements yet. What I would like to achieve is the following statement:

Answer 1

Doing this with a CSS Grid is pretty easy. The trick is to set the grid's height to 100vw, then assign one of the rows to 75vw, and the remaining one (optional) to 1fr. This gives you, from what I assume is what you're after, a ratio-locked resizing container.

Example here: https://codesandbox.io/s/21r4z95p7j

You can even utilize the bottom gutter space if you so choose, simply by adding another "item".

Edit: StackOverflow's built-in code runner has some side effects. Pop over to the codesandbox link and you'll see the ratio in action.

body {
  margin: 0;
  padding: 0;
  background-color: #334;
  color: #eee;
}

.main {
  min-height: 100vh;
  min-width: 100vw;
  display: grid;
  grid-template-columns: 100%;
  grid-template-rows: 75vw 1fr;
}

.item {
  background-color: #558;
  padding: 2px;
  margin: 1px;
}

.item.dead {
  background-color: transparent;
}

  
    
    
    
  

  
    

      

        
Item 1