[RESOLVED] IE7 CSS width:100% issue (I know, again)

[dtm32236]

I'm working on a CSS template for a responsive %-based grid. I had it working with IE7 earlier and did something stupid, I guess, and now it's not working.

http://danmathisen.com/respond-css/

How it currently works:

Columns are percent based. So a 1/3 width column (.col-1-3) will be width:32% + margin-left:1% + padding:1%. This is based on Chris Coyier's Don't Overthink It Grids.

In modern browsers, the padding doesn't affect the div width. But in IE7 it does. So I have IE classes (.lt-ie8) that accomodate for the 1% padding. .lt-ie8 .col-1-3 { width: 30%; }. So 30% width + 1% margin-left + 2% padding left/right * 3 - 1% :first-child = 100%. Right? Why doesn't that work in IE7?

Solutions:

I can use behavior: url(/scripts/boxsizing.htc); but hope to make this workable without.

Or use JS to calculate the width then subtract 1px. I think that would work, but it's not ideal.

Or settle with 99% width. Also not ideal.

I'd love a CSS-only solution. Any thoughts?

[rtrethewey]

Whatever you do, you don't want to compromise your design just to accommodate IE7. IE7 usage is generally under 2% worldwide and it's only going to get smaller, so it wouldn't make sense to do anything more than use a conditional comment, perhaps with a <style> to adjust the width.

[dtm32236]

Hey, thanks for taking a look. And I totally agree regarding not letting IE compromise a layout.

I decided to go a hackish route and just played with column percentages in IE until they worked. I ended up with:

.lt-ie8 div[class*="col-"] { padding: 1%; }
.lt-ie8 .col-3-4 { width: 72%; }
.lt-ie8 .col-2-3 { width: 63.3%; }
.lt-ie8 .col-1-2 { width: 46.1%; }
.lt-ie8 .col-1-3 { width: 29.1%; }
.lt-ie8 .col-1-4 { width: 20.8%; }
.lt-ie8 .col-1-5 { width: 15.7%; }
.lt-ie8 .col-1-8 { width: 8.3%; }
.lt-ie8 .col-golden-large { width: 57.4%; }
.lt-ie8 .col-golden-small { width: 35%; }