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if exists("b:current_syntax")
runtime! syntax/css.vim
runtime! after/syntax/css.vim
" load files from vim-css3-syntax plugin (https://github.com/hail2u/vim-css3-syntax)
runtime! after/syntax/css/*.vim
syn case ignore
syn region lessDefinition transparent matchgroup=cssBraces start='{' end='}' contains=css.*Attr,css.*Prop,cssComment,cssValue.*,cssColor,cssTagName,cssPseudoClass,cssUrl,cssImportant,cssError,cssStringQ,cssStringQQ,cssFunction,cssUnicodeEscape,lessDefinition,lessComment,lessClassChar,lessVariable,lessMixinChar,lessAmpersandChar,lessFunction,lessNestedSelector,@cssColors fold
syn match lessVariable "@[[:alnum:]_-]\+" contained
syn match lessVariable "@[[:alnum:]_-]\+" nextgroup=lessVariableAssignment skipwhite
syn match lessVariableAssignment ":" contained nextgroup=lessVariableValue skipwhite
syn match lessVariableValue ".*;"me=e-1 contained contains=lessVariable,lessOperator,lessDefault,cssValue.*,@cssColors "me=e-1 means that the last char of the pattern is not highlighted
syn match lessOperator "+" contained
syn match lessOperator "-" contained
syn match lessOperator "/" contained
syn match lessOperator "*" contained
syn match lessNestedSelector "[^/]* {"me=e-1 contained contains=cssTagName,cssAttributeSelector,lessAmpersandChar,lessVariable,lessMixinChar,lessFunction,lessNestedProperty
syn match lessNestedProperty "[[:alnum:]]\+:"me=e-1 contained
syn match lessDefault "!default" contained
syn match lessMixinChar "\.[[:alnum:]_-]\@=" contained nextgroup=lessClass
syn match lessAmpersandChar "&" contained nextgroup=lessClass,cssPseudoClass
syn match lessClass "[[:alnum:]_-]\+" contained
" functions {{{
" string functions
syn keyword lessFunction escape e % containedin=cssDefinition contained
" misc functions
syn keyword lessFunction unit containedin=cssDefinition contained
" math functions
syn keyword lessFunction ceil floor percentage round containedin=cssDefinition contained
" color definition
syn keyword lessFunction rgb rgba argb hsl hsla hsv hsva containedin=cssDefinition contained
" color channel information
syn keyword lessFunction hue saturation lightness red green blue alpha luma containedin=cssDefinition contained
" color operations
syn keyword lessFunction saturate desaturate lighten darken fadein fadeout fade spin mix greyscale contrast containedin=cssDefinition contained
" color blending
syn keyword lessFunction multiply screen overlay softlight hardlight difference exclusion average negation containedin=cssDefinition contained
" }}}
syn match lessComment "//.*$" contains=@Spell
hi def link lessVariable Special
hi def link lessVariableValue Constant
hi def link lessDefault Special
hi def link lessComment Comment
hi def link lessFunction Function
hi def link lessMixinChar Special
hi def link lessAmpersandChar Special
hi def link lessNestedProperty Type
hi def link lessClass PreProc
let b:current_syntax = "less"