.all-IE{property:value9;} :root .IE-9{property:value/;} .gte-IE-8{property:value;} .lte-IE-7{*property:value;} .IE-7{+property:value;} .IE-6{_property:value;} .not-IE{property//:value;} @-moz-document url-prefix() { .firefox{property:value;} } @media all and (-webkit-min-device-pixel-ratio:0) { .webkit{property:value;} } @media all and (-webkit-min-device-pixel-ratio:10000),not all and (-webkit-min-device-pixel-ratio:0) { .opera{property:value;} } @media screen and (max-device-width: 480px) { .iphone-or-mobile-s-webkit{property:value;} }