feat: optional parent selector

scss/components/_progress.scss

@@ -13,7 +13,7 @@
 
   // 1. Add the correct display in Edge 18- and IE
   // 2. Add the correct vertical alignment in Chrome, Edge, and Firefox
-  progress {
+  #{$parent-selector} progress {
     display: inline-block; // 1
     vertical-align: baseline; // 2
   }
@@ -21,7 +21,7 @@
   // Pico
   // ––––––––––––––––––––
 
-  progress {
+  #{$parent-selector} progress {
     // Reset the default appearance
     -webkit-appearance: none;
     -moz-appearance: none;
@@ -84,7 +84,7 @@
 
   [dir="rtl"] {
     @media (prefers-reduced-motion: no-preference) {
-      progress:indeterminate {
+      #{$parent-selector} progress:indeterminate {
         animation-direction: reverse;
       }
     }