CSS Rules that only match when 2 classes coexist

[Sean9080]

I'm looking for something that only happens when 2 classes are present.Eg:\[code\].positive{ color:#46a546;}.positive:after{ content: "\25b2";}.negative{ color:#F00;}.arrow:after{ content: "\25bc";}<span class="positive"> hi </span><span class="positiveArrow"> hi </span> <span class="negativeArrow"> hi </span> //what i have<span class="positive arrow"> hi </span><span class="negative arrow"> hi </span> // what i want\[/code\]