+ ("filter" url "blur()" "brightness()" "contrast()" "drop-shadow()"
+ "grayscale()" "hue-rotate()" "invert()" "opacity()" "saturate()" "sepia()")
+ ("flex" flex-grow flex-shrink flex-basis)
+ ("flex-basis" percentage length "auto")
+ ("flex-direction" "row" "row-reverse" "column" "column-reverse")
+ ("flex-flow" flex-direction flex-wrap)
+ ("flex-grow" number)
+ ("flex-shrink" number)
+ ("flex-wrap" "nowrap" "wrap" "wrap-reverse")
+ ("font-feature-setting" normal string number)
+ ("font-kerning" "auto" "normal" "none")
+ ("font-language-override" "normal" string)
+ ("font-size-adjust" "none" number)
+ ("font-stretch" "normal" "ultra-condensed" "extra-condensed" "condensed"
+ "semi-condensed" "semi-expanded" "expanded" "extra-expanded" "ultra-expanded")
+ ("font-synthesis" "none" "weight" "style")
+ ("font-variant" font-variant-alternates font-variant-caps
+ font-variant-east-asian font-variant-ligatures font-variant-numeric
+ font-variant-position)
+ ("font-variant-alternates" "normal" "historical-forms" "stylistic()"
+ "styleset()" "character-variant()" "swash()" "ornaments()" "annotation()")
+ ("font-variant-caps" "normal" "small-caps" "all-small-caps" "petite-caps"
+ "all-petite-caps" "unicase" "titling-caps")
+ ("font-variant-east-asian" "jis78" "jis83" "jis90" "jis04" "simplified"
+ "traditional" "full-width" "proportional-width" "ruby")
+ ("font-variant-ligatures" "normal" "none" "common-ligatures"
+ "no-common-ligatures" "discretionary-ligatures" "no-discretionary-ligatures"
+ "historical-ligatures" "no-historical-ligatures" "contextual" "no-contextual")
+ ("font-variant-numeric" "normal" "ordinal" "slashed-zero"
+ "lining-nums" "oldstyle-nums" "proportional-nums" "tabular-nums"
+ "diagonal-fractions" "stacked-fractions")
+ ("font-variant-position" "normal" "sub" "super")
+ ("hyphens" "none" "manual" "auto")
+ ("justify-content" align-common "space-between" "space-around")
+ ("line-break" "auto" "loose" "normal" "strict")