Convert docs to docsy

site/themes/docsy/assets/scss/support/_utilities.scss

@@ -0,0 +1,82 @@
+// Mixins
+
+@mixin optional-at-root($sel) {
+    @at-root #{if(not &, $sel, selector-append(&, $sel))} {
+        @content;
+    }
+}
+
+@mixin placeholder {
+    @include optional-at-root("::-webkit-input-placeholder") {
+        @content;
+    }
+
+
+    @include optional-at-root(":-moz-placeholder") {
+        @content;
+    }
+
+
+    @include optional-at-root("::-moz-placeholder") {
+        @content;
+    }
+
+
+    @include optional-at-root(":-ms-input-placeholder") {
+        @content;
+    }
+}
+
+// Common util classes.
+
+.td-border-top {
+    border: none;
+    border-top: 1px solid #eee;
+}
+
+.td-border-none {
+    border: none;
+}
+
+.td-block-padding {
+    padding-top: $td-block-space-top-base ;
+    padding-bottom: $td-block-space-bottom-base;
+
+    @include media-breakpoint-up(md) {
+        padding-top: $td-block-space-top-base * 1.25;
+        padding-bottom: $td-block-space-bottom-base * 1.25;
+    }
+}
+
+.td-overlay {
+    position: relative;
+
+    &::after {
+        content: "";
+        position: absolute;
+        top: 0;
+        right: 0;
+        bottom: 0;
+        left: 0;
+    }
+
+    &--dark::after {
+        background-color: rgba($dark, 0.3);
+    }
+
+    &--light::after {
+        background-color: rgba($light, 0.3);
+    }
+
+    &__inner {
+        position: relative;
+        z-index: 1;
+    }
+}
+
+.td-max-width-on-larger-screens {
+    @include media-breakpoint-up(lg) {
+        max-width: 80%;
+    }
+
+}