added sass files

_sass/README.md

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+# normalize.scss
+
+Normalize.scss is an SCSS copy of [normalize.css](http://necolas.github.io/normalize.css), a customisable CSS file that makes browsers render all elements more consistently and in line with modern standards.
+
+The [normalize.scss fork](https://github.com/guerrero/normalize.scss) of [normalize.css](http://necolas.github.io/normalize.css) was archived in 2014, and has not been updated since v0.1.0.
+
+[View the normalize.css test file](http://necolas.github.io/normalize.css/latest/test.html)

_sass/_buttons.scss

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+// Colored button
+
+@mixin btn-color($fg, $bg) {
+  color: $fg;
+  background-color: darken($bg, 2%);
+  background-image: linear-gradient(lighten($bg, 5%), darken($bg, 2%));
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25), 0 4px 10px rgba(0, 0, 0, 0.12);
+
+  &:hover,
+  &.zeroclipboard-is-hover {
+    color: $fg;
+    background-color: darken($bg, 4%);
+    background-image: linear-gradient((lighten($bg, 2%), darken($bg, 4%)));
+  }
+
+  &:active,
+  &.selected,
+  &.zeroclipboard-is-active {
+    background-color: darken($bg, 5%);
+    background-image: none;
+    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.15);
+  }
+
+  &.selected:hover {
+    background-color: darken($bg, 10%);
+  }
+}

_sass/_colors.scss

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+//
+// Utility classes for colors
+//
+
+// Text colors
+
+.text-grey-dk-000 {
+  color: $grey-dk-000 !important;
+}
+
+.text-grey-dk-100 {
+  color: $grey-dk-100 !important;
+}
+
+.text-grey-dk-200 {
+  color: $grey-dk-200 !important;
+}
+
+.text-grey-dk-250 {
+  color: $grey-dk-250 !important;
+}
+
+.text-grey-dk-300 {
+  color: $grey-dk-300 !important;
+}
+
+.text-grey-lt-000 {
+  color: $grey-lt-000 !important;
+}
+
+.text-grey-lt-100 {
+  color: $grey-lt-100 !important;
+}
+
+.text-grey-lt-200 {
+  color: $grey-lt-200 !important;
+}
+
+.text-grey-lt-300 {
+  color: $grey-lt-300 !important;
+}
+
+.text-blue-000 {
+  color: $blue-000 !important;
+}
+
+.text-blue-100 {
+  color: $blue-100 !important;
+}
+
+.text-blue-200 {
+  color: $blue-200 !important;
+}
+
+.text-blue-300 {
+  color: $blue-300 !important;
+}
+
+.text-green-000 {
+  color: $green-000 !important;
+}
+
+.text-green-100 {
+  color: $green-100 !important;
+}
+
+.text-green-200 {
+  color: $green-200 !important;
+}
+
+.text-green-300 {
+  color: $green-300 !important;
+}
+
+.text-purple-000 {
+  color: $purple-000 !important;
+}
+
+.text-purple-100 {
+  color: $purple-100 !important;
+}
+
+.text-purple-200 {
+  color: $purple-200 !important;
+}
+
+.text-purple-300 {
+  color: $purple-300 !important;
+}
+
+.text-yellow-000 {
+  color: $yellow-000 !important;
+}
+
+.text-yellow-100 {
+  color: $yellow-100 !important;
+}
+
+.text-yellow-200 {
+  color: $yellow-200 !important;
+}
+
+.text-yellow-300 {
+  color: $yellow-300 !important;
+}
+
+.text-red-000 {
+  color: $red-000 !important;
+}
+
+.text-red-100 {
+  color: $red-100 !important;
+}
+
+.text-red-200 {
+  color: $red-200 !important;
+}
+
+.text-red-300 {
+  color: $red-300 !important;
+}
+
+// Background colors
+
+.bg-grey-dk-000 {
+  background-color: $grey-dk-000 !important;
+}
+
+.bg-grey-dk-100 {
+  background-color: $grey-dk-100 !important;
+}
+
+.bg-grey-dk-200 {
+  background-color: $grey-dk-200 !important;
+}
+
+.bg-grey-dk-250 {
+  background-color: $grey-dk-250 !important;
+}
+
+.bg-grey-dk-300 {
+  background-color: $grey-dk-300 !important;
+}
+
+.bg-grey-lt-000 {
+  background-color: $grey-lt-000 !important;
+}
+
+.bg-grey-lt-100 {
+  background-color: $grey-lt-100 !important;
+}
+
+.bg-grey-lt-200 {
+  background-color: $grey-lt-200 !important;
+}
+
+.bg-grey-lt-300 {
+  background-color: $grey-lt-300 !important;
+}
+
+.bg-blue-000 {
+  background-color: $blue-000 !important;
+}
+
+.bg-blue-100 {
+  background-color: $blue-100 !important;
+}
+
+.bg-blue-200 {
+  background-color: $blue-200 !important;
+}
+
+.bg-blue-300 {
+  background-color: $blue-300 !important;
+}
+
+.bg-green-000 {
+  background-color: $green-000 !important;
+}
+
+.bg-green-100 {
+  background-color: $green-100 !important;
+}
+
+.bg-green-200 {
+  background-color: $green-200 !important;
+}
+
+.bg-green-300 {
+  background-color: $green-300 !important;
+}
+
+.bg-purple-000 {
+  background-color: $purple-000 !important;
+}
+
+.bg-purple-100 {
+  background-color: $purple-100 !important;
+}
+
+.bg-purple-200 {
+  background-color: $purple-200 !important;
+}
+
+.bg-purple-300 {
+  background-color: $purple-300 !important;
+}
+
+.bg-yellow-000 {
+  background-color: $yellow-000 !important;
+}
+
+.bg-yellow-100 {
+  background-color: $yellow-100 !important;
+}
+
+.bg-yellow-200 {
+  background-color: $yellow-200 !important;
+}
+
+.bg-yellow-300 {
+  background-color: $yellow-300 !important;
+}
+
+.bg-red-000 {
+  background-color: $red-000 !important;
+}
+
+.bg-red-100 {
+  background-color: $red-100 !important;
+}
+
+.bg-red-200 {
+  background-color: $red-200 !important;
+}
+
+.bg-red-300 {
+  background-color: $red-300 !important;
+}

_sass/_functions.scss

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+@function rem($size, $unit: "") {
+  $remSize: $size / $root-font-size;
+
+  @if ($unit == false) {
+    @return #{$remSize};
+  } @else {
+    @return #{$remSize}rem;
+  }
+}

_sass/_layout.scss

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+// stylelint-disable primer/selector-no-utility, primer/no-override
+//
+// Utility classes for layout
+//
+
+// Display
+
+.d-block {
+  display: block !important;
+}
+.d-flex {
+  display: flex !important;
+}
+.d-inline {
+  display: inline !important;
+}
+.d-inline-block {
+  display: inline-block !important;
+}
+.d-none {
+  display: none !important;
+}
+
+@each $media-query in map-keys($media-queries) {
+  @for $i from 1 through length($spacers) {
+    @include mq($media-query) {
+      $size: #{map-get($spacers, sp-#{$i - 1})};
+      $scale: #{$i - 1};
+
+      // .d-sm-block, .d-md-none, .d-lg-inline
+      .d-#{$media-query}-block {
+        display: block !important;
+      }
+      .d-#{$media-query}-flex {
+        display: flex !important;
+      }
+      .d-#{$media-query}-inline {
+        display: inline !important;
+      }
+      .d-#{$media-query}-inline-block {
+        display: inline-block !important;
+      }
+      .d-#{$media-query}-none {
+        display: none !important;
+      }
+    }
+  }
+}
+
+// Horizontal alignment
+
+.float-left {
+  float: left !important;
+}
+
+.float-right {
+  float: right !important;
+}
+
+.flex-justify-start {
+  justify-content: flex-start !important;
+}
+
+.flex-justify-end {
+  justify-content: flex-end !important;
+}
+
+.flex-justify-between {
+  justify-content: space-between !important;
+}
+
+.flex-justify-around {
+  justify-content: space-around !important;
+}
+
+// Vertical alignment
+
+.v-align-baseline {
+  vertical-align: baseline !important;
+}
+.v-align-bottom {
+  vertical-align: bottom !important;
+}
+.v-align-middle {
+  vertical-align: middle !important;
+}
+.v-align-text-bottom {
+  vertical-align: text-bottom !important;
+}
+.v-align-text-top {
+  vertical-align: text-top !important;
+}
+.v-align-top {
+  vertical-align: top !important;
+}

_sass/_lists.scss

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+//
+// Utility classes for lists
+//
+
+// stylelint-disable primer/selector-no-utility, primer/no-override, selector-max-type
+
+.list-style-none {
+  padding: 0 !important;
+  margin: 0 !important;
+  list-style: none !important;
+
+  li {
+    &::before {
+      display: none !important;
+    }
+  }
+}