Determine the aspect ratio with a constant adjustment using CSS/SCSS

I am trying to adjust the aspect ratio of a responsive div to create a square shape with an offset. I want the height to be equal to the width plus the specified offset.

Here is an example of what I am attempting:

.div {
  width: 100%;
  aspect-ratio: 1 / (1 + 30px); // This part is causing me difficulty
}

In simpler terms, if the width is 300px, the height should be 330px. If the width is 600px, the height should be 630px.

Is it feasible to achieve this using CSS/SCSS? Or perhaps I am approaching the problem incorrectly?

I have experimented with combinations of calc() and var(), but unfortunately, they all result in invalid CSS rules.

For instance:

{
  width: 100%;
  aspect-ratio: 1 / (calc(calc(var(width) + 30px) / var(width))
}

Answer №1

That's not a proper aspect ratio.

The aspect-ratio property should not use pixels because it is meant to be a ratio, not a fixed unit like pixels. Using pixels would result in different aspect ratios depending on the width, which goes against the concept of an aspect ratio.

If you're unsure about what you're trying to accomplish, consider setting the aspect ratio on the inner element and using a separate offset element to create the total desired element.

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