Responsive CSS Circles

Question

Goal:

Responsive CSS circles that:

1. Scale with equal radius.
2. Radius can be calculated by percent.
3. Radius can be controlled by media queries.

---

If solution is javascript, I still need to emulate media query triggers. I dont 'need' media queries but I do want the ability to control the radius by percentage at certain widths:

@media (max-width : 320px) 
{
    .x2{padding: 50%;}
}

@media (min-width : 321px) and (max-width : 800px)
{
    .x2{padding: 25%;}
}

@media (min-width: 801px)
{
    .x2{padding: 12.5%;}
}

Here is what I have so far:

http://jsfiddle.net/QmPhb/

<div class="x1">
    <div class="x2">
        lol dude      
    </div>
    <div class="x2"></div>
    <div class="x2"></div>
    <div class="x2"></div>
</div>

.x1
{
    float:left;
    width:100%;
}

.x2
{
    display:block;
    float:left;
    padding: 12.5%;          //Currently being used to control radius.
    width:auto;
    height:auto;
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    -khtml-border-radius: 50%;
    background:#eee;
    text-align:center;
}

Problems:

In this solution, when content is added to a circle:

• The shape contorts when scaled past it's available padding.
• Increases the size of the radius.

---

Update:

I've built a working solution for this here: Responsive CSS Circles

Answer 1

You don't need @media queries for this. This is my try, pure CSS:

.x1 {
    overflow:hidden;
}
.x1 .x2 {
    display:block;
    float:left;
    padding: 12.5%;
    width:auto;
    height:auto;
    border-radius:50%;
    -moz-border-radius:50%;
    -webkit-border-radius:50%;
    -khtml-border-radius: 50%;
    background:#eee;
    text-align:center;
    position: relative;
}
.x1 .x2 span {
    position: absolute;
    width: 100%;
    left: 0;
    top: 48%;
    line-height: 1em;
    height: 1em;
    font-size: 100%;
    overflow: hidden;
}​

Fiddle

Full Screen