CSS: transition cross-browser rules

#amazing-element {
    -webkit-transition: all .3s ease-in-out;
    -moz-transition:    all .3s ease-in-out;
    -o-transition:      all .3s ease-in-out;
    -ms-transition:     all .3s ease-in-out;
    transition:         all .3s ease-in-out;
}