# File lib/rouge/lexers/css.rb, line 16
      def self.attributes
        @attributes ||= Set.new %w(
          align-content align-items align-self alignment-adjust
          alignment-baseline all anchor-point animation
          animation-delay animation-direction animation-duration
          animation-fill-mode animation-iteration-count animation-name
          animation-play-state animation-timing-function appearance
          azimuth backface-visibility background background-attachment
          background-clip background-color background-image
          background-origin background-position background-repeat
          background-size baseline-shift binding bleed bookmark-label
          bookmark-level bookmark-state bookmark-target border
          border-bottom border-bottom-color border-bottom-left-radius
          border-bottom-right-radius border-bottom-style
          border-bottom-width border-collapse border-color
          border-image border-image-outset border-image-repeat
          border-image-slice border-image-source border-image-width
          border-left border-left-color border-left-style
          border-left-width border-radius border-right
          border-right-color border-right-style border-right-width
          border-spacing border-style border-top border-top-color
          border-top-left-radius border-top-right-radius
          border-top-style border-top-width border-width bottom
          box-align box-decoration-break box-direction box-flex
          box-flex-group box-lines box-ordinal-group box-orient
          box-pack box-shadow box-sizing break-after break-before
          break-inside caption-side clear clip clip-path
          clip-rule color color-profile columns column-count
          column-fill column-gap column-rule column-rule-color
          column-rule-style column-rule-width column-span
          column-width content counter-increment counter-reset
          crop cue cue-after cue-before cursor direction display
          dominant-baseline drop-initial-after-adjust
          drop-initial-after-align drop-initial-before-adjust
          drop-initial-before-align drop-initial-size
          drop-initial-value elevation empty-cells filter fit
          fit-position flex flex-basis flex-direction flex-flow
          flex-grow flex-shrink flex-wrap float float-offset
          font font-family font-feature-settings
          font-kerning font-language-override font-size
          font-size-adjust font-stretch font-style font-synthesis
          font-variant font-variant-alternates font-variant-caps
          font-variant-east-asian font-variant-ligatures
          font-variant-numeric font-variant-position font-weight
          grid-cell grid-column grid-column-align grid-column-sizing
          grid-column-span grid-columns grid-flow grid-row
          grid-row-align grid-row-sizing grid-row-span
          grid-rows grid-template hanging-punctuation height
          hyphenate-after hyphenate-before hyphenate-character
          hyphenate-lines hyphenate-resource hyphens icon
          image-orientation image-rendering image-resolution
          ime-mode inline-box-align justify-content
          left letter-spacing line-break line-height
          line-stacking line-stacking-ruby line-stacking-shift
          line-stacking-strategy list-style list-style-image
          list-style-position list-style-type margin
          margin-bottom margin-left margin-right margin-top
          mark marker-offset marks mark-after mark-before
          marquee-direction marquee-loop marquee-play-count
          marquee-speed marquee-style mask max-height max-width
          min-height min-width move-to nav-down
          nav-index nav-left nav-right nav-up object-fit
          object-position opacity order orphans outline
          outline-color outline-offset outline-style
          outline-width overflow overflow-style overflow-wrap
          overflow-x overflow-y padding padding-bottom
          padding-left padding-right padding-top
          page page-break-after page-break-before
          page-break-inside page-policy pause pause-after
          pause-before perspective perspective-origin
          phonemes pitch pitch-range play-during pointer-events
          position presentation-level punctuation-trim quotes
          rendering-intent resize rest rest-after rest-before
          richness right rotation rotation-point ruby-align
          ruby-overhang ruby-position ruby-span size speak
          speak-as speak-header speak-numeral speak-punctuation
          speech-rate src stress string-set
          tab-size table-layout target target-name
          target-new target-position text-align
          text-align-last text-combine-horizontal
          text-decoration text-decoration-color
          text-decoration-line text-decoration-skip
          text-decoration-style text-emphasis
          text-emphasis-color text-emphasis-position
          text-emphasis-style text-height text-indent
          text-justify text-orientation text-outline
          text-overflow text-rendering text-shadow
          text-space-collapse text-transform
          text-underline-position text-wrap top
          transform transform-origin transform-style
          transition transition-delay transition-duration
          transition-property transition-timing-function
          unicode-bidi vertical-align
          visibility voice-balance voice-duration
          voice-family voice-pitch voice-pitch-range
          voice-range voice-rate voice-stress voice-volume
          volume white-space widows width word-break
          word-spacing word-wrap writing-mode z-index
        )
      end