--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/default/assets/scss/vendors/bootstrap/mixins/_screen-reader.scss	Sat May 31 09:21:51 2025 +0800
@@ -0,0 +1,35 @@
+// Only display content to screen readers
+//
+// See: http://a11yproject.com/posts/how-to-hide-content
+// See: http://hugogiraudel.com/2016/10/13/css-hide-and-seek/
+
+@mixin sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  overflow: hidden;
+  clip: rect(0,0,0,0);
+  white-space: nowrap;
+  clip-path: inset(50%);
+  border: 0;
+}
+
+// Use in conjunction with .sr-only to only display content when it's focused.
+//
+// Useful for "Skip to main content" links; see https://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
+//
+// Credit: HTML5 Boilerplate
+
+@mixin sr-only-focusable {
+  &:active,
+  &:focus {
+    position: static;
+    width: auto;
+    height: auto;
+    overflow: visible;
+    clip: auto;
+    white-space: normal;
+    clip-path: none;
+  }
+}