146610 2015-07-04 08:19:14 -0700 CSS rule with capital letter in <link rel=import> is ignored 2022-07-24 13:51:23 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) PC Windows 8 RESOLVED CONFIGURATION CHANGED P2 Major --- 1 kivoloid webkit-unassigned ahmad.saleem792 ap benjamin bfulgham rniwa simon.fraser zalan oldest_to_newest 1106858 0 kivoloid 2015-07-04 08:19:14 -0700 The CSS rules with capital letter in <link rel=import> seems to be ignored in WebKit. For example, the CSS rule ".foo .barWithCapital" is not applied to the document, unlike the other rules in the code below.  <html> <head> <link rel="import" href="/out/test-library.html"> </head> <body> <div class="foo"> <input class="barwithoutcapital barWithCapital" /> </div> </body> </html>  <style> .foo * { position: relative; } .foo input { top: 30px; } .foo .barWithCapital { left: 20px; } .foo .barwithoutcapital { border: 2px solid black; } </style> 1886373 1 ahmad.saleem792 2022-07-24 10:50:55 -0700 I am unable to reproduce this bug in Safari 15.6 on macOS 12.5 using test case mentioned in Comment 0 and changed into following JSFiddle: Link - https://jsfiddle.net/t1hysm3p/show Safari 15.6 matches with other browsers (Chrome Canary 106 and Firefox Nightly 104) and show the input 20px left side and can be seen in "Computed" from Developer Tools as well. Since all browsers are matching with each other, I think this can be considered as "RESOLVED WONTFIX" or "RESOLVED INVALID" or "RESOLVED CONFIGURATION CHANGED" or accordingly. Thanks!