Switching to different style of theme selection

src/_maketheme.scss

@@ -1,6 +1,7 @@
 @import "./_vals.scss";
 
 $ns: "" !default;
+$name: false !default;
 
 $background: false !default;
 $on-background: false !default;
@@ -11,26 +12,31 @@ $on-button: #000000 !default;
     @error ("background and on-background must be set!");
 }
 
-:root {
+@if $name==false {
+    @error ("name must be set!");
+}
+
+$theme: #{$name}-theme;
+::root {
     --background: #{$background};
     --on-background: #{$on-background};
 }
 
-.background-default {
+.#{$theme} .background-default {
     background: $background;
 }
 
 @each $dp in $elevations {
-    .elv-#{$dp} {
+    .#{$theme} .elv-#{$dp} {
         @include Elevation($dp, false);
     }
 
-    .elv-#{$dp}-imp {
+    .#{$theme} .elv-#{$dp}-imp {
         @include Elevation($dp, true);
     }
 }
 
-.elv-transition {
+.#{$theme} .elv-transition {
     @include ElevationTransition();
 }