sticky) {\n    position: sticky;\n    top: 0;\n    z-index: $zindex-sticky;\n  }\n}\n","//\n// Screenreaders\n//\n\n.sr-only {\n  @include sr-only();\n}\n\n.sr-only-focusable {\n  @include sr-only-focusable();\n}\n","// Only display content to screen readers\n//\n// See: https://www.a11yproject.com/posts/2013-01-11-how-to-hide-content/\n// See: https://kittygiraudel.com/2016/10/13/css-hide-and-seek/\n\n@mixin sr-only() {\n  position: absolute;\n  width: 1px;\n  height: 1px;\n  padding: 0;\n  margin: -1px;...

are still covered by their original MIT license, with the additional
copyright staring in 2011 when the project was ported over:

    apic.go emitterc.go parserc.go readerc.go scannerc.go
    writerc.go yamlh.go yamlprivateh.go

Copyright (c) 2006-2010 Kirill Simonov
Copyright (c) 2006-2011 Kirill Simonov