CSS Grids and Responsive Design

Question

I am planning to use a Grid system for a site, but I'd like to be able to break the grid selectively. This would mean, for example, turning an OOCSS size1of2 into a size1of1). Ideally, the html would look something like this:

<div class="line">
    <div class="unit size1of2 respond-480">
        <h3>1/2</h3>
        <p>Lorem ipsum dolor sit amet...</p>
    </div>
    <div class="unit size1of2 respond-480 lastUnit">
        <h3>1/2</h3>
        <p>Lorem ipsum dolor sit amet...</p>
    </div>
</div>

Then I'd have something like the following css:

@media screen and (max-device-width: 480px) {
    .respond-480 {
        /* something to linearize the box */
    }
}

Does anyone know of a way to do this with OOCSS, or another grid system? I'm looking for this level of control, as opposed to a simpler responsive grid.

Answer 1

Turns out it makes more sense to add the respond480 class to the line rather than the unit. Not surprising. The following code works rather well for modern browsers. I used the child selector to simplify things -- though it may be possible to do a workaround, older browsers (IE<6) don't support these media queries anyway.

@media screen and (max-width: 480px) {
    .respond480 > .unit {
        width: auto;
        float: none;
    }
}

I was digging through the OOCSS source, and came across grids/grids_iphone.css. This lends some credibility to my strategy. Anyone know if !important is mandatory? Selectivity seems work for me without it -- probably due to the two class selectors.

@media screen and (max-width: 319px) {
    .unit {
        float: none !important;
        width: auto !important;
    }
}

And here's a page showing it in action. I used Nicole Sullivan's grid test from Arnaud Gueras, but with more filler text. Note that I left one 2of2 segment purposefully un-linearized, to demonstrate that it's not necessary to linearize everything.