//// Component animations// --------------------------------------------------// Heads up!//// We don't use the `.opacity()` mixin here since it causes a bug with text// fields in IE7-8. Source: https://github.com/twbs/bootstrap/pull/3552..fade{opacity:0;@includetransition(opacity.15slinear);&.in{opacity:1;}}.collapse{display:none;&.in{display:block;}// [converter] extracted tr&.in to tr.collapse.in// [converter] extracted tbody&.in to tbody.collapse.in}tr.collapse.in{display:table-row;}tbody.collapse.in{display:table-row-group;}.collapsing{position:relative;height:0;overflow:hidden;@includetransition-property(height,visibility);@includetransition-duration(.35s);@includetransition-timing-function(ease);}