This is great! On my tablet the perf isn't great though (no fault to the author). I'm wondering what CSS properties cause perf to degrade on a use like this? Lo

This is great! On my tablet the perf isn't great though (no fault to the author). I'm wondering what CSS properties cause perf to degrade on a use like this? Looking at the CSS myself I'm guessing it's the box-shadow usage. But I could be wrong. Any chance some of this could be put on the GPU?