First release

node_modules/cssgram/source/scss/_shared.scss

@@ -0,0 +1,29 @@
+%pseudo-elem {
+  content: '';
+  display: block;
+  height: 100%;
+  width: 100%;
+  top: 0;
+  left: 0;
+  position: absolute;
+  pointer-events: none;
+}
+
+%filter-base {
+  position: relative;
+
+  img {
+    width: 100%;
+    z-index: 1;
+  }
+
+  &:before {
+    @extend %pseudo-elem;
+    z-index: 2;
+  }
+
+  &:after {
+    @extend %pseudo-elem;
+    z-index: 3;
+  }
+}