diff --git a/css/css-tests.ts b/css/css-tests.ts
new file mode 100644
index 000000000..f1f959882
--- /dev/null
+++ b/css/css-tests.ts
@@ -0,0 +1,26 @@
+/// <reference path="./css.d.ts" />
+
+import css = require("css");
+var parserOptions: css.ParserOptions;
+parserOptions = {
+	silent: true,
+	source: "test.css"
+};
+
+var stylesheet = css.parse("body { font-size: 12px; }", parserOptions);
+
+var comment: css.Comment;
+comment = {
+	type: "comment",
+	comment: "Hello World"
+};
+
+stylesheet.stylesheet.rules.push(comment);
+
+var stringifyOptions: css.StringifyOptions;
+stringifyOptions = {
+	indent: "    "
+};
+
+var content = css.stringify(stylesheet, stringifyOptions);
+console.log(content);
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diff --git a/css/css.d.ts b/css/css.d.ts
new file mode 100644
index 000000000..504916401
--- /dev/null
+++ b/css/css.d.ts
@@ -0,0 +1,135 @@
+// Type definitions for css
+// Project: https://github.com/reworkcss/css
+// Definitions by: Ilya Verbitskiy <https://github.com/ilich>
+// Definitions: https://github.com/ilich/DefinitelyTyped
+
+declare module "css" {
+
+	// Options
+
+	interface ParserOptions {
+		silent?: boolean;
+		source?: string;
+	}
+
+	interface StringifyOptions {
+		indent?: string;
+		compress?: boolean;
+		sourcemap?: string;
+		inputSourcemaps?: boolean;
+	}
+
+	// Errors
+
+	interface ParserError {
+		message?: string;
+		reason?: string;
+		filename?: string;
+		line?: number;
+		column?: number;
+		source?: string;
+	}
+
+	// AST Tree
+
+	interface Position {
+		line?: number;
+		column?: number;
+	}
+
+	interface Node {
+		type?: string;
+		parent?: Node;
+		position?: {
+			start?: Position;
+			end?: Position;
+			source?: string;
+			content?: string;
+		};
+	}
+
+	interface Rule extends Node {
+		selectors?: Array<string>;
+		declarations?: Array<Declaration|Comment>;
+	}
+
+	interface Declaration extends Node {
+		property?: string;
+		value?: string;
+	}
+
+	interface Comment extends Node {
+		comment?: string;
+	}
+
+	interface Charset {
+		charset?: string;
+	}
+
+	interface CustomMedia {
+		name?: string;
+		media?: string;
+	}
+
+	interface Document {
+		document?: string;
+		vendor?: string;
+		rules?: Array<Rule|Comment|AtRule>;
+	}
+
+	interface FontFace {
+		declarations?: Array<Declaration|Comment>;
+	}
+
+	interface Host {
+		rules?: Array<Rule|Comment|AtRule>;
+	}
+
+	interface Import {
+		import?: string;
+	}
+
+	interface KeyFrames {
+		name?: string;
+		vendor?: string;
+		keyframes?: Array<KeyFrame|Comment>;
+	}
+
+	interface KeyFrame {
+		values?: Array<string>;
+		declarations?: Array<Declaration|Comment>;
+	}
+
+	interface Media {
+		media?: string;
+		rules?: Array<Rule|Comment|AtRule>;
+	}
+
+	interface Namespace {
+		namespace?: string;
+	}
+
+	interface Page {
+		selectors?: Array<string>;
+		declarations?: Array<Declaration|Comment>;
+	}
+
+	interface Supports {
+		supports?: string;
+		rules?: Array<Rule|Comment|AtRule>;
+	}
+
+	type AtRule = Charset|CustomMedia|Document|FontFace|Host|Import|KeyFrames|Media|Namespace|Page|Supports;
+
+	interface Stylesheet extends Node {
+		stylesheet?: {
+			rules?: Array<Rule|Comment|AtRule>;
+			parsingErrors?: Array<ParserError>
+		};
+	}
+
+	// API
+
+	function parse(code?: string, options?: ParserOptions): Stylesheet;
+	function stringify(stylesheet?: Stylesheet, options?: StringifyOptions): string;
+}
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