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(function(Prism) {
	Prism.languages.sass = Prism.languages.extend('css', {
		// Sass comments don't need to be closed, only indented
		'comment': /^([ \t]*)\/[\/*].*(?:(?:\r?\n|\r)\1[ \t]+.+)*/m
	});

	Prism.languages.insertBefore('sass', 'atrule', {
		// We want to consume the whole line
		'atrule-line': {
			// Includes support for = and + shortcuts
			pattern: /^(?:[ \t]*)[@+=].+/m,
			inside: {
				'atrule': /^(?:[ \t]*)(?:@[\w-]+|[+=])/m
			}
		}
	});
	delete Prism.languages.sass.atrule;


	var variable = /((\$[-_\w]+)|(#\{\$[-_\w]+\}))/i;
	var operator = /[-+]{1,2}|==?|!=|\|?\||\?|\*|\/|%/;

	Prism.languages.insertBefore('sass', 'property', {
		// We want to consume the whole line
		'variable-line': {
			pattern: /(^|(?:\r?\n|\r))[ \t]*\$.+/,
			lookbehind: true,
			inside: {
				'punctuation': /:/,
				'variable': variable,
				'operator': operator
			}
		},
		// We want to consume the whole line
		'property-line': {
			pattern: /(^|(?:\r?\n|\r))[ \t]*(?:[^:\s]+[ ]*:.*|:[^:\s]+.*)/i,
			lookbehind: true,
			inside: {
				'property': [
					/[^:\s]+(?=\s*:)/,
					{
						pattern: /(:)[^:\s]+/,
						lookbehind: true
					}
				],
				'punctuation': /:/,
				'variable': variable,
				'operator': operator,
				'important': Prism.languages.sass.important
			}
		}
	});
	delete Prism.languages.sass.property;
	delete Prism.languages.sass.important;

	// Now that whole lines for other patterns are consumed,
	// what's left should be selectors
	delete Prism.languages.sass.selector;
	Prism.languages.insertBefore('sass', 'punctuation', {
		'selector': {
			pattern: /([ \t]*).+(?:,(?:\r?\n|\r)\1[ \t]+.+)*/,
			lookbehind: true
		}
	});

}(Prism));