How to make CSS visible only for Opera
Solution 1:
works great for Opera 10.63
noindex:-o-prefocus, .class {
color:#fff;
}
Solution 2:
This hack works for the latest Opera:
@media all and (-webkit-min-device-pixel-ratio:10000), not all and (-webkit-min-device-pixel-ratio:0) {
#id {css rule}
}
It doesn't touch any other browser as far as i tested, but this may be actual for several months, with web technologies boom etc.