a{height:0;}
a{height:0;}
a{height:0;}
a{height:0;}
a{height:0;}
a{height:0;}

a,b,c{height:0;}
a,b,c{height:0;}
a,b,c{height:0;}

a{background:url('path;to;file?a=1&b=2') 50% 50% no-repeat;}
a{background:url("path;to;file?a=1&b=2") 50% 50% no-repeat;}

a[bar="foo,bar"]{height:0;}
a:first-child(.foo,.bar){height:0;}

a{margin:1px 2px 3px\9;}

:root{--color:red;}
a{color:var(--color);}

foo bar baz{bizz-buzz:word "ferrets";*even:'ie boo';}
.wtf{*overflow-x:hidden;//max-height:110px;#height:18px;}

@charset "UTF-8";

@custom-media --test (max-width: 1024px);
@custom-media --narrow-window (max-width: 1024px);
@custom-media --wide-window screen and (max-width: 1024px);

@document url-prefix(){.test{height:0;}}
@-moz-document url-prefix(){.test1{height:0;}.test2{height:0;}}

@font-face{font-family:"Bitstream Vera Serif Bold";src:url("http://developer.mozilla.org/@api/deki/files/2934/=VeraSeBd.ttf");}

@host{:scope{height:0;}}

@import 'test.css';
@import "test.css" screen, projection;
@import url('test.css');
@import url("test.css") print;
@import url("test.css") projection, tv;
@import url('test.css') screen and (orientation:landscape);

@keyframes test1{from{opacity:0;}to{opacity:1;}}
@-webkit-keyframes test2{from{opacity:0;}to{opacity:1;}}
@keyframes test3{0%{opacity:0;}30.50%{opacity:0.3050;}.68%,72%,85%{opacity:0.85;}100%{opacity:1;}}

@media (min-width: 1024px){.test{height:0;}}
@media screen, print{.test{height:0;}}

@namespace svg "http://www.w3.org/2000/svg";
@namespace "http://www.w3.org/1999/xhtml";

@page {margin:1cm;}
@page :first{margin:1cm;}
@page toc, index:blank{margin:1cm;}
@page toc, index:blank{margin:1cm;}

@supports (display: flex){a{height:0;}}
@supports (display: flex) or (display: box){a{height:0;}}

a[bcd="e\",f"]{height:0;}
#♥{height:0;}
#©{height:0;}
#“‘’”{height:0;}
#☺☃{height:0;}
#⌘⌥{height:0;}
#𝄞♪♩♫♬{height:0;}
#\?{height:0;}
#\@{height:0;}
#\.{height:0;}
#\3A \){height:0;}
#\3A \`\({height:0;}
#\31 23{height:0;}
#\31 a2b3c{height:0;}
#\<p\>{height:0;}
#\<\>\<\<\<\>\>\<\>{height:0;}
#\+\+\+\+\+\+\+\+\+\+\[\>\+\+\+\+\+\+\+\>\+\+\+\+\+\+\+\+\+\+\>\+\+\+\>\+\<\<\<\<\-\]\>\+\+\.\>\+\.\+\+\+\+\+\+\+\.\.\+\+\+\.\>\+\+\.\<\<\+\+\+\+\+\+\+\+\+\+\+\+\+\+\+\.\>\.\+\+\+\.\-\-\-\-\-\-\.\-\-\-\-\-\-\-\-\.\>\+\.\>\.{height:0;}
#\#{height:0;}
#\#\#{height:0;}
#\#\.\#\.\#{height:0;}
#\_{height:0;}
#\.fake\-class{height:0;}
#foo\.bar{height:0;}
#\3A hover{height:0;}
#\3A hover\3A focus\3A active{height:0;}
#\[attr\=value\]{height:0;}
#f\/o\/o{height:0;}
#f\\o\\o{height:0;}
#f\*o\*o{height:0;}
#f\!o\!o{height:0;}
#f\'o\'o{height:0;}
#f\~o\~o{height:0;}
#f\+o\+o{height:0;}