diff --git a/.svgo.yml b/.svgo.yml
index a504b9666..a1889e6c7 100644
--- a/.svgo.yml
+++ b/.svgo.yml
@@ -23,6 +23,7 @@ plugins:
   - removeXMLNS
   - removeEditorsNSData
   - cleanupAttrs
+  - inlineStyles
   - minifyStyles
   - convertStyleToAttrs
   - cleanupIDs
diff --git a/docs/how-it-works/en.md b/docs/how-it-works/en.md
index 469367c7d..47b19d927 100644
--- a/docs/how-it-works/en.md
+++ b/docs/how-it-works/en.md
@@ -199,6 +199,114 @@ And of course, writing plugins would not have been so cool without some sugar AP
   * @param {Object} [context] callback context
   * @return {Boolean} false if there are no any attributes
 
+
+##### querySelectorAll(selectors)
+  * Evaluate a string of CSS selectors against the element and returns matched elements
+  * @param {String} selectors CSS selector(s) string
+  * @return {Array} null if no elements matched
+
+##### querySelector(selectors)
+  * Evaluate a string of CSS selectors against the element and returns only the first matched element
+  * @param {String} selectors CSS selector(s) string
+  * @return {Array} null if no element matched
+
+##### matches(selector)
+  * Test if a selector matches a given element
+  * @param {String} selector CSS selector string
+  * @return {Boolean} true if element would be selected by selector string, false if it does not
+
+
+##### style.getCssText()
+  * Get the textual representation of the declaration block (equivalent to .cssText attribute).
+  * @return {String} Textual representation of the declaration block (empty string for no properties)
+
+##### style.getPropertyPriority(propertyName)
+  * Return the optional priority, "important".
+  * @param {String} propertyName representing the property name to be checked.
+  * @return {String} priority that represents the priority (e.g. "important") if one exists. If none exists, returns the empty string.
+
+##### style.getPropertyValue(propertyName)
+  * Return the property value given a property name.
+  * @param {String} propertyName representing the property name to be checked.
+  * @return {String} value containing the value of the property. If not set, returns the empty string.
+
+##### style.item(index)
+  * Return a property name.
+  * @param {Number} index of the node to be fetched. The index is zero-based.
+  * @return {String} propertyName that is the name of the CSS property at the specified index.
+
+##### style.getProperties()
+  * Return all properties of the node.
+  * @return {Map} properties that is a Map with propertyName as key and property (propertyValue + propertyPriority) as value.
+
+##### style.removeProperty(propertyName)
+  * Remove a property from the CSS declaration block.
+  * @param {String} propertyName representing the property name to be removed.
+  * @return {String} oldValue equal to the value of the CSS property before it was removed.
+
+##### style.setProperty(propertyName, value, priority)
+  * Modify an existing CSS property or creates a new CSS property in the declaration block.
+  * @param {String} propertyName representing the CSS property name to be modified.
+  * @param {String} [value] containing the new property value. If not specified, treated as the empty string. value must not contain "!important" -- that should be set using the priority parameter.
+  * @param {String} [priority] allowing the "important" CSS priority to be set. If not specified, treated as the empty string.
+  * @return {undefined}
+
+
+##### css-tools.flattenToSelectors(cssAst)
+  * Flatten a CSS AST to a selectors list.
+  * @param {Object} CSS AST to flatten
+  * @return {Array} selectors
+
+##### css-tools.filterByMqs(selectors, useMqs)
+  * Filter selectors by Media Query.
+  * @param {Array} Selectors to filter
+  * @param {Array} Strings of media queries that should pass (<name> <expression>)
+  * @return {Array} Filtered selectors that match the passed media queries
+
+##### css-tools.filterByPseudos(selectors, useMqs)
+  * Filter selectors by the pseudo-elements and/or -classes they contain.
+  * @param {Array} Selectors to filter
+  * @param {Array} Strings of single or sequence of pseudo-elements and/or -classes that should pass
+  * @return {Array} Filtered selectors that match the passed pseudo-elements and/or -classes
+
+##### css-tools.cleanPseudos(selectors)
+  * Remove pseudo-elements and/or -classes from the selectors for proper matching.
+  * @param {Array} Selectors to clean
+  * @return {Array} Selectors without pseudo-elements and/or -classes
+
+##### css-tools.compareSpecificity(aSpecificity, bSpecificity)
+  * Compare two selector specificities.
+  * @param {Array} Specificity of selector A
+  * @param {Array} Specificity of selector B
+  * @return {Number} Score of selector specificity A compared to selector specificity B
+
+##### css-tools.compareSimpleSelectorNode(aSimpleSelectorNode, bSimpleSelectorNode)
+  * Compare two simple selectors.
+  * @param {Object} Simple selector A
+  * @param {Object} Simple selector B
+  * @return {Number} Score of selector A compared to selector B
+
+##### css-tools.sortSelectors(selectors)
+  * Sort selectors stably by their specificity.
+  * @param {Array} Selectors to be sorted
+  * @return {Array} Stable sorted selectors
+
+##### css-tools.csstreeToStyleDeclaration(declaration)
+  * Convert a css-tree AST style declaration to CSSStyleDeclaration property.
+  * @param {Object} css-tree style declaration
+  * @return {Object} CSSStyleDeclaration property
+
+##### css-tools.getCssStr(elem)
+  * Gets the CSS string of a style element
+  * @param {Object} element style element
+  * @return {String|Array} CSS string or empty array if no styles are set
+
+##### css-tools.csstreeToStyleDeclaration(elem, css)
+  * @param {Object} element style element
+  * @param {String} CSS string to be set
+  * @return {Object} reference to field with CSS
+
+
 #### 3.3 tests
 
 There is nothing easier than testing your plugin:
diff --git a/lib/css-tools.js b/lib/css-tools.js
new file mode 100644
index 000000000..e054f6bb2
--- /dev/null
+++ b/lib/css-tools.js
@@ -0,0 +1,222 @@
+'use strict';
+
+var csstree     = require('css-tree'),
+    List        = csstree.List,
+    stable      = require('stable'),
+    specificity = require('csso/lib/restructure/prepare/specificity');
+
+
+/**
+ * Flatten a CSS AST to a selectors list.
+ *
+ * @param {Object} cssAst css-tree AST to flatten
+ * @return {Array} selectors
+ */
+function flattenToSelectors(cssAst) {
+    var selectors = [];
+
+    csstree.walkRules(cssAst, function(node) {
+        if (node.type !== 'Rule') {
+            return;
+        }
+
+        var atrule = this.atrule;
+        var rule = node;
+
+        node.selector.children.each(function(selectorNode, selectorItem) {
+            var selector = {
+                item: selectorItem,
+                atrule: atrule,
+                rule: rule,
+                pseudos: []
+            };
+
+            selectorNode.children.each(function(selectorChildNode, selectorChildItem, selectorChildList) {
+                if (selectorChildNode.type === 'PseudoClassSelector' ||
+                    selectorChildNode.type === 'PseudoElementSelector') {
+                    selector.pseudos.push({
+                        item: selectorChildItem,
+                        list: selectorChildList
+                    });
+                }
+            });
+
+            selectors.push(selector);
+        });
+    });
+
+    return selectors;
+}
+
+/**
+ * Filter selectors by Media Query.
+ *
+ * @param {Array} selectors to filter
+ * @param {Array} useMqs Array with strings of media queries that should pass (<name> <expression>)
+ * @return {Array} Filtered selectors that match the passed media queries
+ */
+function filterByMqs(selectors, useMqs) {
+    return selectors.filter(function(selector) {
+        if (selector.atrule === null) {
+            return ~useMqs.indexOf('');
+        }
+
+        var mqName = selector.atrule.name;
+        var mqStr = mqName;
+        if (selector.atrule.expression &&
+            selector.atrule.expression.children.first().type === 'MediaQueryList') {
+            var mqExpr = csstree.translate(selector.atrule.expression);
+            mqStr = [mqName, mqExpr].join(' ');
+        }
+
+        return ~useMqs.indexOf(mqStr);
+    });
+}
+
+/**
+ * Filter selectors by the pseudo-elements and/or -classes they contain.
+ *
+ * @param {Array} selectors to filter
+ * @param {Array} usePseudos Array with strings of single or sequence of pseudo-elements and/or -classes that should pass
+ * @return {Array} Filtered selectors that match the passed pseudo-elements and/or -classes
+ */
+function filterByPseudos(selectors, usePseudos) {
+    return selectors.filter(function(selector) {
+        var pseudoSelectorsStr = csstree.translate({
+            type: 'Selector',
+            children: new List().fromArray(selector.pseudos.map(function(pseudo) {
+                return pseudo.item.data;
+            }))
+        });
+        return ~usePseudos.indexOf(pseudoSelectorsStr);
+    });
+}
+
+/**
+ * Remove pseudo-elements and/or -classes from the selectors for proper matching.
+ *
+ * @param {Array} selectors to clean
+ * @return {Array} Selectors without pseudo-elements and/or -classes
+ */
+function cleanPseudos(selectors) {
+    selectors.forEach(function(selector) {
+        selector.pseudos.forEach(function(pseudo) {
+            pseudo.list.remove(pseudo.item);
+        });
+    });
+}
+
+
+/**
+ * Compares two selector specificities.
+ * extracted from https://github.com/keeganstreet/specificity/blob/master/specificity.js#L211
+ *
+ * @param {Array} aSpecificity Specificity of selector A
+ * @param {Array} bSpecificity Specificity of selector B
+ * @return {Number} Score of selector specificity A compared to selector specificity B
+ */
+function compareSpecificity(aSpecificity, bSpecificity) {
+    for (var i = 0; i < 4; i += 1) {
+        if (aSpecificity[i] < bSpecificity[i]) {
+            return -1;
+        } else if (aSpecificity[i] > bSpecificity[i]) {
+            return 1;
+        }
+    }
+
+    return 0;
+}
+
+
+/**
+ * Compare two simple selectors.
+ *
+ * @param {Object} aSimpleSelectorNode Simple selector A
+ * @param {Object} bSimpleSelectorNode Simple selector B
+ * @return {Number} Score of selector A compared to selector B
+ */
+function compareSimpleSelectorNode(aSimpleSelectorNode, bSimpleSelectorNode) {
+    var aSpecificity = specificity(aSimpleSelectorNode),
+        bSpecificity = specificity(bSimpleSelectorNode);
+    return compareSpecificity(aSpecificity, bSpecificity);
+}
+
+function _bySelectorSpecificity(selectorA, selectorB) {
+    return compareSimpleSelectorNode(selectorA.item.data, selectorB.item.data);
+}
+
+
+/**
+ * Sort selectors stably by their specificity.
+ *
+ * @param {Array} selectors to be sorted
+ * @return {Array} Stable sorted selectors
+ */
+function sortSelectors(selectors) {
+    return stable(selectors, _bySelectorSpecificity);
+}
+
+
+/**
+ * Convert a css-tree AST style declaration to CSSStyleDeclaration property.
+ *
+ * @param {Object} declaration css-tree style declaration
+ * @return {Object} CSSStyleDeclaration property
+ */
+function csstreeToStyleDeclaration(declaration) {
+    var propertyName = declaration.property,
+        propertyValue = csstree.translate(declaration.value),
+        propertyPriority = (declaration.important ? 'important' : '');
+    return {
+        name: propertyName,
+        value: propertyValue,
+        priority: propertyPriority
+    };
+}
+
+
+/**
+ * Gets the CSS string of a style element
+ *
+ * @param {Object} element style element
+ * @return {String|Array} CSS string or empty array if no styles are set
+ */
+function getCssStr(elem) {
+    return elem.content[0].text || elem.content[0].cdata || [];
+}
+
+/**
+ * Sets the CSS string of a style element
+ *
+ * @param {Object} element style element
+ * @param {String} CSS string to be set
+ * @return {Object} reference to field with CSS
+ */
+function setCssStr(elem, css) {
+    // in case of cdata field
+    if(elem.content[0].cdata) {
+        elem.content[0].cdata = css;
+        return elem.content[0].cdata;
+    }
+
+    // in case of text field + if nothing was set yet
+    elem.content[0].text  = css;
+    return elem.content[0].text;
+}
+
+
+module.exports.flattenToSelectors = flattenToSelectors;
+
+module.exports.filterByMqs = filterByMqs;
+module.exports.filterByPseudos = filterByPseudos;
+module.exports.cleanPseudos = cleanPseudos;
+
+module.exports.compareSpecificity = compareSpecificity;
+module.exports.compareSimpleSelectorNode = compareSimpleSelectorNode;
+
+module.exports.sortSelectors = sortSelectors;
+
+module.exports.csstreeToStyleDeclaration = csstreeToStyleDeclaration;
+
+module.exports.getCssStr = getCssStr;
+module.exports.setCssStr = setCssStr;
diff --git a/lib/svgo/css-class-list.js b/lib/svgo/css-class-list.js
new file mode 100644
index 000000000..28e5816a2
--- /dev/null
+++ b/lib/svgo/css-class-list.js
@@ -0,0 +1,116 @@
+'use strict';
+
+var values = require('object.values');
+if (!Object.values) {
+    values.shim();
+}
+
+
+var CSSClassList = function(node) {
+    this.parentNode = node;
+    this.classNames = new Set();
+    this.classAttr = null;
+    //this.classValue = null;
+};
+
+
+CSSClassList.prototype.hasClass = function() {
+    this.classAttr = { // empty class attr
+        'name': 'class',
+        'value': null
+    };
+
+    this.addClassHandler();
+};
+
+
+// attr.class
+
+CSSClassList.prototype.addClassHandler = function() {
+
+    Object.defineProperty(this.parentNode.attrs, 'class', {
+        get: this.getClassAttr.bind(this),
+        set: this.setClassAttr.bind(this),
+        enumerable: true,
+        configurable: true
+    });
+
+    this.addClassValueHandler();
+};
+
+// attr.class.value
+
+CSSClassList.prototype.addClassValueHandler = function() {
+
+    Object.defineProperty(this.classAttr, 'value', {
+        get: this.getClassValue.bind(this),
+        set: this.setClassValue.bind(this),
+        enumerable: true,
+        configurable: true
+    });
+};
+
+CSSClassList.prototype.getClassAttr = function() {
+    return this.classAttr;
+};
+
+CSSClassList.prototype.setClassAttr = function(newClassAttr) {
+    this.setClassValue(newClassAttr.value); // must before applying value handler!
+
+    this.classAttr = newClassAttr;
+    this.addClassValueHandler();
+};
+
+CSSClassList.prototype.getClassValue = function() {
+    var arrClassNames = Array.from(this.classNames);
+    return arrClassNames.join(' ');
+};
+
+CSSClassList.prototype.setClassValue = function(newValue) {
+    if(typeof newValue === 'undefined') {
+      this.classNames.clear();
+      return;
+    }
+    var arrClassNames = newValue.split(' ');
+    this.classNames = new Set(arrClassNames);
+};
+
+
+CSSClassList.prototype.add = function(/* variadic */) {
+    this.hasClass();
+    Object.values(arguments).forEach(this._addSingle.bind(this));
+};
+
+CSSClassList.prototype._addSingle = function(className) {
+    this.classNames.add(className);
+};
+
+
+CSSClassList.prototype.remove = function(/* variadic */) {
+    this.hasClass();
+    Object.values(arguments).forEach(this._removeSingle.bind(this));
+};
+
+CSSClassList.prototype._removeSingle = function(className) {
+    this.classNames.delete(className);
+};
+
+
+CSSClassList.prototype.item = function(index) {
+    var arrClassNames = Array.from(this.classNames);
+    return arrClassNames[index];
+};
+
+CSSClassList.prototype.toggle = function(className, force) {
+    if(this.contains(className) || force === false) {
+        this.classNames.delete(className);
+    }
+    this.classNames.add(className);
+};
+
+CSSClassList.prototype.contains = function(className) {
+    return this.classNames.has(className);
+};
+
+
+module.exports = CSSClassList;
\ No newline at end of file
diff --git a/lib/svgo/css-select-adapter.js b/lib/svgo/css-select-adapter.js
new file mode 100644
index 000000000..c37678cbf
--- /dev/null
+++ b/lib/svgo/css-select-adapter.js
@@ -0,0 +1,53 @@
+'use strict';
+
+var baseCssAdapter = require('css-select-base-adapter');
+
+/**
+ * DOMUtils API for SVGO AST (used by css-select)
+ */
+var svgoCssSelectAdapterMin = {
+
+    // is the node a tag?
+    // isTag: ( node:Node ) => isTag:Boolean
+    isTag: function(node) {
+        return node.isElem();
+    },
+
+    // get the parent of the node
+    // getParent: ( node:Node ) => parentNode:Node
+    // returns null when no parent exists
+    getParent: function(node) {
+        return node.parentNode || null;
+    },
+
+    // get the node's children
+    // getChildren: ( node:Node ) => children:[Node]
+    getChildren: function(node) {
+        return node.content || [];
+    },
+
+    // get the name of the tag
+    // getName: ( elem:ElementNode ) => tagName:String
+    getName: function(elemAst) {
+        return elemAst.elem;
+    },
+
+    // get the text content of the node, and its children if it has any
+    // getText: ( node:Node ) => text:String
+    // returns empty string when there is no text
+    getText: function(node) {
+        return node.content[0].text || node.content[0].cdata || '';
+    },
+
+    // get the attribute value
+    // getAttributeValue: ( elem:ElementNode, name:String ) => value:String
+    // returns null when attribute doesn't exist
+    getAttributeValue: function(elem, name) {
+        return elem.hasAttr(name) ? elem.attr(name).value : null;
+    }
+};
+
+// use base adapter for default implementation
+var svgoCssSelectAdapter = baseCssAdapter(svgoCssSelectAdapterMin);
+
+module.exports = svgoCssSelectAdapter;
diff --git a/lib/svgo/css-style-declaration.js b/lib/svgo/css-style-declaration.js
new file mode 100644
index 000000000..43527fd10
--- /dev/null
+++ b/lib/svgo/css-style-declaration.js
@@ -0,0 +1,257 @@
+'use strict';
+
+var csstree = require('css-tree'),
+    csstools = require('../css-tools');
+
+
+var CSSStyleDeclaration = function(node) {
+    this.parentNode = node;
+
+    this.properties = new Map();
+    this.hasSynced = false;
+
+    this.styleAttr = null;
+    this.styleValue = null;
+
+    this.parseError = false;
+};
+
+
+CSSStyleDeclaration.prototype.hasStyle = function() {
+    this.styleAttr = { // empty style attr
+        'name': 'style',
+        'value': null
+    };
+
+    this.addStyleHandler();
+};
+
+
+
+
+// attr.style
+
+CSSStyleDeclaration.prototype.addStyleHandler = function() {
+
+    Object.defineProperty(this.parentNode.attrs, 'style', {
+        get: this.getStyleAttr.bind(this),
+        set: this.setStyleAttr.bind(this),
+        enumerable: true,
+        configurable: true
+    });
+
+    this.addStyleValueHandler();
+};
+
+// attr.style.value
+
+CSSStyleDeclaration.prototype.addStyleValueHandler = function() {
+
+    Object.defineProperty(this.styleAttr, 'value', {
+        get: this.getStyleValue.bind(this),
+        set: this.setStyleValue.bind(this),
+        enumerable: true,
+        configurable: true
+    });
+};
+
+CSSStyleDeclaration.prototype.getStyleAttr = function() {
+    return this.styleAttr;
+};
+
+CSSStyleDeclaration.prototype.setStyleAttr = function(newStyleAttr) {
+    this.setStyleValue(newStyleAttr.value); // must before applying value handler!
+
+    this.styleAttr = newStyleAttr;
+    this.addStyleValueHandler();
+    this.hasSynced = false; // raw css changed
+};
+
+CSSStyleDeclaration.prototype.getStyleValue = function() {
+    return this.getCssText();
+};
+
+CSSStyleDeclaration.prototype.setStyleValue = function(newValue) {
+    this.properties.clear(); // reset all existing properties
+    this.styleValue = newValue;
+    this.hasSynced = false; // raw css changed
+};
+
+
+
+
+CSSStyleDeclaration.prototype._loadCssText = function() {
+    if (this.hasSynced) {
+        return;
+    }
+    this.hasSynced = true; // must be set here to prevent loop in setProperty(...)
+
+    if (!this.styleValue || this.styleValue.length === 0) {
+        return;
+    }
+    var inlineCssStr = this.styleValue;
+
+    var declarations = {};
+    try {
+        declarations = csstree.parse(inlineCssStr, {
+            context: 'declarationList',
+            parseValue: false
+        });
+    } catch (parseError) {
+        this.parseError = parseError;
+        return;
+    }
+    this.parseError = false;
+
+    var self = this;
+    declarations.children.each(function(declaration) {
+        var styleDeclaration = csstools.csstreeToStyleDeclaration(declaration);
+        self.setProperty(styleDeclaration.name, styleDeclaration.value, styleDeclaration.priority);
+    });
+};
+
+
+// only reads from properties
+
+/**
+ * Get the textual representation of the declaration block (equivalent to .cssText attribute).
+ *
+ * @return {String} Textual representation of the declaration block (empty string for no properties)
+ */
+CSSStyleDeclaration.prototype.getCssText = function() {
+    var properties = this.getProperties();
+
+    if (this.parseError) {
+        // in case of a parse error, pass through original styles
+        return this.styleValue;
+    }
+
+    var cssText = [];
+    properties.forEach(function(property, propertyName) {
+        var strImportant = property.priority === 'important' ? '!important' : '';
+        cssText.push(propertyName.trim() + ':' + property.value.trim() + strImportant);
+    });
+    return cssText.join(';');
+};
+
+CSSStyleDeclaration.prototype._handleParseError = function() {
+    if (this.parseError) {
+        console.warn('Warning: Parse error when parsing inline styles, style properties of this element cannot be used. The raw styles can still be get/set using .attr(\'style\').value. Error details: ' + this.parseError);
+    }
+};
+
+
+CSSStyleDeclaration.prototype._getProperty = function(propertyName) {
+    if(typeof propertyName === 'undefined') {
+        throw Error('1 argument required, but only 0 present.');
+    }
+
+    var properties = this.getProperties();
+    this._handleParseError();
+
+    var property = properties.get(propertyName.trim());
+    return property;
+};
+
+/**
+ * Return the optional priority, "important".
+ *
+ * @param {String} propertyName representing the property name to be checked.
+ * @return {String} priority that represents the priority (e.g. "important") if one exists. If none exists, returns the empty string.
+ */
+CSSStyleDeclaration.prototype.getPropertyPriority = function(propertyName) {
+    var property = this._getProperty(propertyName);
+    return property ? property.priority : '';
+};
+
+/**
+ * Return the property value given a property name.
+ *
+ * @param {String} propertyName representing the property name to be checked.
+ * @return {String} value containing the value of the property. If not set, returns the empty string.
+ */
+CSSStyleDeclaration.prototype.getPropertyValue = function(propertyName) {
+    var property = this._getProperty(propertyName);
+    return property ? property.value : null;
+};
+
+/**
+ * Return a property name.
+ *
+ * @param {Number} index of the node to be fetched. The index is zero-based.
+ * @return {String} propertyName that is the name of the CSS property at the specified index.
+ */
+CSSStyleDeclaration.prototype.item = function(index) {
+    if(typeof index === 'undefined') {
+        throw Error('1 argument required, but only 0 present.');
+    }
+
+    var properties = this.getProperties();
+    this._handleParseError();
+
+    return Array.from(properties.keys())[index];
+};
+
+/**
+ * Return all properties of the node.
+ *
+ * @return {Map} properties that is a Map with propertyName as key and property (propertyValue + propertyPriority) as value.
+ */
+CSSStyleDeclaration.prototype.getProperties = function() {
+    this._loadCssText();
+    return this.properties;
+};
+
+
+// writes to properties
+
+/**
+ * Remove a property from the CSS declaration block.
+ *
+ * @param {String} propertyName representing the property name to be removed.
+ * @return {String} oldValue equal to the value of the CSS property before it was removed.
+ */
+CSSStyleDeclaration.prototype.removeProperty = function(propertyName) {
+    if(typeof propertyName === 'undefined') {
+        throw Error('1 argument required, but only 0 present.');
+    }
+
+    this.hasStyle();
+
+    var properties = this.getProperties();
+    this._handleParseError();
+
+    var oldValue = this.getPropertyValue(propertyName);
+    properties.delete(propertyName.trim());
+    return oldValue;
+};
+
+/**
+ * Modify an existing CSS property or creates a new CSS property in the declaration block.
+ *
+ * @param {String} propertyName representing the CSS property name to be modified.
+ * @param {String} [value] containing the new property value. If not specified, treated as the empty string. value must not contain "!important" -- that should be set using the priority parameter.
+ * @param {String} [priority] allowing the "important" CSS priority to be set. If not specified, treated as the empty string.
+ * @return {undefined}
+ */
+CSSStyleDeclaration.prototype.setProperty = function(propertyName, value, priority) {
+    if(typeof propertyName === 'undefined') {
+        throw Error('propertyName argument required, but only not present.');
+    }
+
+    this.hasStyle();
+
+    var properties = this.getProperties();
+    this._handleParseError();
+
+    var property = {
+        value: value.trim(),
+        priority: priority.trim()
+    };
+    properties.set(propertyName.trim(), property);
+
+    return property;
+};
+
+
+module.exports = CSSStyleDeclaration;
diff --git a/lib/svgo/jsAPI.js b/lib/svgo/jsAPI.js
index 5aad68696..db966ee5b 100644
--- a/lib/svgo/jsAPI.js
+++ b/lib/svgo/jsAPI.js
@@ -1,5 +1,13 @@
 'use strict';
 
+var cssSelect = require('css-select');
+
+var svgoCssSelectAdapter = require('./css-select-adapter');
+var cssSelectOpts = {
+  xmlMode: true,
+  adapter: svgoCssSelectAdapter
+};
+
 var JSAPI = module.exports = function(data, parentNode) {
     Object.assign(this, data);
     if (parentNode) {
@@ -252,6 +260,14 @@ JSAPI.prototype.renameElem = function(name) {
     this.attrs = this.attrs || {};
     this.attrs[attr.name] = attr;
 
+    if(attr.name === 'class') { // newly added class attribute
+        this.class.hasClass();
+    }
+
+    if(attr.name === 'style') { // newly added style attribute
+        this.style.hasStyle();
+    }
+
     return this.attrs[attr.name];
 
 };
@@ -293,3 +309,41 @@ JSAPI.prototype.renameElem = function(name) {
     return false;
 
 };
+
+/**
+ * Evaluate a string of CSS selectors against the element and returns matched elements.
+ *
+ * @param {String} selectors CSS selector(s) string
+ * @return {Array} null if no elements matched
+ */
+ JSAPI.prototype.querySelectorAll = function(selectors) {
+
+   var matchedEls = cssSelect(selectors, this, cssSelectOpts);
+
+   return matchedEls.length > 0 ? matchedEls : null;
+
+};
+
+/**
+ * Evaluate a string of CSS selectors against the element and returns only the first matched element.
+ *
+ * @param {String} selectors CSS selector(s) string
+ * @return {Array} null if no element matched
+ */
+ JSAPI.prototype.querySelector = function(selectors) {
+
+   return cssSelect.selectOne(selectors, this, cssSelectOpts);
+
+};
+
+/**
+ * Test if a selector matches a given element.
+ *
+ * @param {String} selector CSS selector string
+ * @return {Boolean} true if element would be selected by selector string, false if it does not
+ */
+ JSAPI.prototype.matches = function(selector) {
+
+   return cssSelect.is(this, selector, cssSelectOpts);
+
+};
diff --git a/lib/svgo/svg2js.js b/lib/svgo/svg2js.js
index 2c36900c3..690e96e8a 100644
--- a/lib/svgo/svg2js.js
+++ b/lib/svgo/svg2js.js
@@ -2,6 +2,8 @@
 
 var SAX = require('sax'),
     JSAPI = require('./jsAPI.js'),
+    CSSClassList = require('./css-class-list'),
+    CSSStyleDeclaration = require('./css-style-declaration'),
     entityDeclaration = /<!ENTITY\s+(\S+)\s+(?:'([^\']+)'|"([^\"]+)")\s*>/g;
 
 var config = {
@@ -87,11 +89,23 @@ module.exports = function(data, callback) {
             prefix: data.prefix,
             local: data.local
         };
+        elem.class = new CSSClassList(elem);
+        elem.style = new CSSStyleDeclaration(elem);
 
         if (Object.keys(data.attributes).length) {
             elem.attrs = {};
 
+
             for (var name in data.attributes) {
+
+                if (name === 'class') { // has class attribute
+                    elem.class.hasClass();
+                }
+
+                if (name === 'style') { // has style attribute
+                    elem.style.hasStyle();
+                }
+
                 elem.attrs[name] = {
                     name: name,
                     value: data.attributes[name].value,
diff --git a/package.json b/package.json
index 3a660da79..343d77a31 100644
--- a/package.json
+++ b/package.json
@@ -50,20 +50,26 @@
   "dependencies": {
     "coa": "~1.0.1",
     "colors": "~1.1.2",
-    "csso": "~2.3.1",
+    "css-select": "^1.3.0-rc0",
+    "css-select-base-adapter": "^0.1.0",
+    "css-tree": "1.0.0-alpha22",
+    "csso": "^3.0.1",
     "js-yaml": "~3.7.0",
     "mkdirp": "~0.5.1",
+    "object.values": "^1.0.4",
     "sax": "~1.2.1",
+    "stable": "^0.1.5",
+    "whet.extend": "~0.9.9",
     "util.promisify": "~1.0.0"
   },
   "devDependencies": {
+    "coveralls": "~2.11.14",
     "fs-extra": "~4.0.1",
-    "mocha": "~3.2.0",
-    "should": "11.2.0",
     "istanbul": "~0.4.5",
+    "mocha": "~3.2.0",
     "mocha-istanbul": "~0.3.0",
     "mock-stdin": "~0.3.1",
-    "coveralls": "~2.11.14"
+    "should": "11.2.0"
   },
   "engines": {
     "node": ">=4.0.0"
diff --git a/plugins/inlineStyles.js b/plugins/inlineStyles.js
new file mode 100644
index 000000000..13d9c6161
--- /dev/null
+++ b/plugins/inlineStyles.js
@@ -0,0 +1,236 @@
+'use strict';
+
+exports.type = 'full';
+
+exports.active = true;
+
+exports.params = {
+    onlyMatchedOnce: true,
+    removeMatchedSelectors: true,
+    useMqs: ['', 'screen'],
+    usePseudos: ['']
+};
+
+exports.description = 'inline styles (additional options)';
+
+
+var csstree = require('css-tree'),
+    cssTools = require('../lib/css-tools');
+
+/**
+ * Moves + merges styles from style elements to element styles
+ *
+ * Options
+ *   onlyMatchedOnce (default: true)
+ *     inline only selectors that match once
+ *
+ *   removeMatchedSelectors (default: true)
+ *     clean up matched selectors,
+ *     leave selectors that hadn't matched
+ *
+ *   useMqs (default: ['', 'screen'])
+ *     what media queries to be used
+ *     empty string element for styles outside media queries
+ *
+ *   usePseudos (default: [''])
+ *     what pseudo-classes/-elements to be used
+ *     empty string element for all non-pseudo-classes and/or -elements
+ *
+ * @param {Object} document document element
+ * @param {Object} opts plugin params
+ *
+ * @author strarsis <strarsis@gmail.com>
+ */
+exports.fn = function(document, opts) {
+
+    // collect <style/>s
+    var styleEls = document.querySelectorAll('style');
+
+    //no <styles/>s, nothing to do
+    if (styleEls === null) {
+        return document;
+    }
+
+    var styles = [],
+        selectors = [];
+
+    for (var styleEl of styleEls) {
+        if (styleEl.isEmpty()) {
+            // skip empty <style/>s
+            continue;
+        }
+        var cssStr = cssTools.getCssStr(styleEl);
+
+        // collect <style/>s and their css ast
+        var cssAst = {};
+        try {
+            cssAst = csstree.parse(cssStr, {
+                parseValue: false,
+                parseCustomProperty: false
+            });
+        } catch (parseError) {
+            console.warn('Warning: Parse error of styles of <style/> element, skipped. Error details: ' + parseError);
+            continue;
+        }
+
+        styles.push({
+            styleEl: styleEl,
+            cssAst: cssAst
+        });
+
+        selectors = selectors.concat(cssTools.flattenToSelectors(cssAst));
+    }
+
+
+    // filter for mediaqueries to be used or without any mediaquery
+    var selectorsMq = cssTools.filterByMqs(selectors, opts.useMqs);
+
+
+    // filter for pseudo elements to be used
+    var selectorsPseudo = cssTools.filterByPseudos(selectorsMq, opts.usePseudos);
+
+    // remove PseudoClass from its SimpleSelector for proper matching
+    cssTools.cleanPseudos(selectorsPseudo);
+
+
+    // stable sort selectors
+    var sortedSelectors = cssTools.sortSelectors(selectorsPseudo).reverse();
+
+
+    var selector,
+        selectedEl;
+
+    // match selectors
+    for (selector of sortedSelectors) {
+        var selectorStr = csstree.translate(selector.item.data),
+            selectedEls = null;
+
+        try {
+            selectedEls = document.querySelectorAll(selectorStr);
+        } catch (selectError) {
+            if (selectError.constructor === SyntaxError) {
+                console.warn('Warning: Syntax error when trying to select \n\n' + selectorStr + '\n\n, skipped. Error details: ' + selectError);
+                continue;
+            }
+            throw selectError;
+        }
+
+        if (selectedEls === null) {
+            // nothing selected
+            continue;
+        }
+
+        selector.selectedEls = selectedEls;
+    }
+
+
+    // apply <style/> styles to matched elements
+    for (selector of sortedSelectors) {
+        if(!selector.selectedEls) {
+            continue;
+        }
+
+        if (opts.onlyMatchedOnce && selector.selectedEls !== null && selector.selectedEls.length > 1) {
+            // skip selectors that match more than once if option onlyMatchedOnce is enabled
+            continue;
+        }
+
+        // apply <style/> to matched elements
+        for (selectedEl of selector.selectedEls) {
+            if (selector.rule === null) {
+                continue;
+            }
+
+            // merge declarations
+            csstree.walkDeclarations(selector.rule, function(styleCsstreeDeclaration) {
+
+                // existing inline styles have higher priority
+                // no inline styles, external styles,                                    external styles used
+                // inline styles,    external styles same   priority as inline styles,   inline   styles used
+                // inline styles,    external styles higher priority than inline styles, external styles used
+                var styleDeclaration = cssTools.csstreeToStyleDeclaration(styleCsstreeDeclaration);
+                if (selectedEl.style.getPropertyValue(styleDeclaration.name) !== null &&
+                    selectedEl.style.getPropertyPriority(styleDeclaration.name) >= styleDeclaration.priority) {
+                    return;
+                }
+                selectedEl.style.setProperty(styleDeclaration.name, styleDeclaration.value, styleDeclaration.priority);
+            });
+        }
+
+        if (opts.removeMatchedSelectors && selector.selectedEls !== null && selector.selectedEls.length > 0) {
+            // clean up matching simple selectors if option removeMatchedSelectors is enabled
+            selector.rule.selector.children.remove(selector.item);
+        }
+    }
+
+
+    if (opts.removeMatchedSelectors) {
+        // clean up matched class + ID attribute values
+        for (selector of sortedSelectors) {
+            if(!selector.selectedEls) {
+                continue;
+            }
+
+            for (selectedEl of selector.selectedEls) {
+                // class
+                var firstSubSelector = selector.item.data.children.first();
+                if(firstSubSelector.type === 'ClassSelector') {
+                    selectedEl.class.remove(firstSubSelector.name);
+                }
+                // clean up now empty class attributes
+                if(typeof selectedEl.class.item(0) === 'undefined') {
+                    selectedEl.removeAttr('class');
+                }
+
+                // ID
+                if(firstSubSelector.type === 'IdSelector') {
+                    selectedEl.removeAttr('id', firstSubSelector.name);
+                }
+            }
+        }
+    }
+
+
+    // clean up elements
+    for (var style of styles) {
+        csstree.walkRules(style.cssAst, function(node, item, list) {
+            // clean up <style/> atrules without any rulesets left
+            if (node.type === 'Atrule' &&
+                // only Atrules containing rulesets
+                node.block !== null &&
+                node.block.children.isEmpty()) {
+                list.remove(item);
+                return;
+            }
+
+            // clean up <style/> rulesets without any css selectors left
+            if (node.type === 'Rule' &&
+                node.selector.children.isEmpty()) {
+                list.remove(item);
+            }
+        });
+
+
+        if (style.cssAst.children.isEmpty()) {
+            // clean up now emtpy <style/>s
+            var styleParentEl = style.styleEl.parentNode;
+            styleParentEl.spliceContent(styleParentEl.content.indexOf(style.styleEl), 1);
+
+            if (styleParentEl.elem === 'defs' &&
+                styleParentEl.content.length === 0) {
+                // also clean up now empty <def/>s
+                var defsParentEl = styleParentEl.parentNode;
+                defsParentEl.spliceContent(defsParentEl.content.indexOf(styleParentEl), 1);
+            }
+
+            continue;
+        }
+
+
+        // update existing, left over <style>s
+        cssTools.setCssStr(style.styleEl, csstree.translate(style.cssAst));
+    }
+
+
+    return document;
+};
diff --git a/test/plugins/inlineStyles.01.svg b/test/plugins/inlineStyles.01.svg
new file mode 100644
index 000000000..24cda3991
--- /dev/null
+++ b/test/plugins/inlineStyles.01.svg
@@ -0,0 +1,9 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" class="st0"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" class="st0"/>
+</svg>
diff --git a/test/plugins/inlineStyles.02.svg b/test/plugins/inlineStyles.02.svg
new file mode 100644
index 000000000..e7f2794cd
--- /dev/null
+++ b/test/plugins/inlineStyles.02.svg
@@ -0,0 +1,12 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st0{fill:blue;}
+    </style>
+    <rect width="100" height="100" class="st0"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
diff --git a/test/plugins/inlineStyles.03.svg b/test/plugins/inlineStyles.03.svg
new file mode 100644
index 000000000..32f554268
--- /dev/null
+++ b/test/plugins/inlineStyles.03.svg
@@ -0,0 +1,24 @@
+<svg xmlns="http://www.w3.org/2000/svg" id="dark" viewBox="0 0 258.12 225.88">
+<!-- for https://github.com/svg/svgo/pull/592#issuecomment-266327016 -->
+    <style>
+        .cls-7 {
+            only-cls-7: 1;
+        }
+        .cls-7,
+        .cls-8 {
+            cls-7-and-8: 1;
+        }
+    </style>
+
+    <path class="cls-7"/>
+</svg>
+
+@@@
+
+<svg xmlns="http://www.w3.org/2000/svg" id="dark" viewBox="0 0 258.12 225.88">
+<!--for https://github.com/svg/svgo/pull/592#issuecomment-266327016-->
+    <style>
+        .cls-8{cls-7-and-8: 1}
+    </style>
+    <path style="cls-7-and-8:1;only-cls-7:1"/>
+</svg>
diff --git a/test/plugins/inlineStyles.04.svg b/test/plugins/inlineStyles.04.svg
new file mode 100644
index 000000000..a4ba6dc72
--- /dev/null
+++ b/test/plugins/inlineStyles.04.svg
@@ -0,0 +1,13 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st0{fill:blue;}
+        .st1{fill:red; }
+    </style>
+    <rect width="100" height="100" class="st0 st1"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:red"/>
+</svg>
diff --git a/test/plugins/inlineStyles.05.svg b/test/plugins/inlineStyles.05.svg
new file mode 100644
index 000000000..1d8f86040
--- /dev/null
+++ b/test/plugins/inlineStyles.05.svg
@@ -0,0 +1,17 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st1 {
+            fill: red;
+        }
+        .st0 {
+            color: blue;
+        }
+    </style>
+    <rect width="100" height="100" class="st0 st1" style="color:yellow"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="color:yellow;fill:red"/>
+</svg>
diff --git a/test/plugins/inlineStyles.06.svg b/test/plugins/inlineStyles.06.svg
new file mode 100644
index 000000000..3490e8618
--- /dev/null
+++ b/test/plugins/inlineStyles.06.svg
@@ -0,0 +1,23 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .red {
+            fill: red;
+        }
+        .blue {
+            fill: blue;
+        }
+    </style>
+    <rect width="100" height="100" class="red blue"/>
+    <rect width="100" height="100" class="blue red"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:blue"/>
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
+
+@@@
+
+{"onlyMatchedOnce":false}
diff --git a/test/plugins/inlineStyles.07.svg b/test/plugins/inlineStyles.07.svg
new file mode 100644
index 000000000..a2f2f40cb
--- /dev/null
+++ b/test/plugins/inlineStyles.07.svg
@@ -0,0 +1,17 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .red {
+            fill: red !important;
+        }
+        .blue {
+            fill: blue;
+        }
+    </style>
+    <rect width="100" height="100" class="blue red"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:red!important"/>
+</svg>
diff --git a/test/plugins/inlineStyles.08.svg b/test/plugins/inlineStyles.08.svg
new file mode 100644
index 000000000..3224d0e9f
--- /dev/null
+++ b/test/plugins/inlineStyles.08.svg
@@ -0,0 +1,17 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .red {
+            fill: red !important;
+        }
+        .blue {
+            fill: blue;
+        }
+    </style>
+    <rect width="100" height="100" class="blue red" style="fill:yellow"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:red!important"/>
+</svg>
diff --git a/test/plugins/inlineStyles.09.svg b/test/plugins/inlineStyles.09.svg
new file mode 100644
index 000000000..025064b50
--- /dev/null
+++ b/test/plugins/inlineStyles.09.svg
@@ -0,0 +1,17 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .red {
+            fill: red !important;
+        }
+        .blue {
+            fill: blue;
+        }
+    </style>
+    <rect width="100" height="100" class="blue red" style="fill:yellow !important"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:yellow!important"/>
+</svg>
diff --git a/test/plugins/inlineStyles.10.svg b/test/plugins/inlineStyles.10.svg
new file mode 100644
index 000000000..a555dcec8
--- /dev/null
+++ b/test/plugins/inlineStyles.10.svg
@@ -0,0 +1,14 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        <![CDATA[
+            .st0{fill:blue;}
+        ]]>
+    </style>
+    <rect width="100" height="100" class="st0"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
diff --git a/test/plugins/inlineStyles.11.svg b/test/plugins/inlineStyles.11.svg
new file mode 100644
index 000000000..2ce5a9e1a
--- /dev/null
+++ b/test/plugins/inlineStyles.11.svg
@@ -0,0 +1,16 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st0{fill:blue;}
+        .st0:hover{stroke:red;}
+    </style>
+    <rect width="100" height="100" class="st0"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st0:hover{stroke:red}
+    </style>
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
diff --git a/test/plugins/inlineStyles.12.svg b/test/plugins/inlineStyles.12.svg
new file mode 100644
index 000000000..0b7312b0a
--- /dev/null
+++ b/test/plugins/inlineStyles.12.svg
@@ -0,0 +1,16 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <style>
+        .st0:hover{stroke:red;}
+    </style>
+    <rect width="100" height="100" class="st0"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+    <rect width="100" height="100" style="stroke:red"/>
+</svg>
+
+@@@
+
+{"usePseudos":[":hover"]}
diff --git a/test/plugins/inlineStyles.13.svg b/test/plugins/inlineStyles.13.svg
new file mode 100644
index 000000000..5c7b39616
--- /dev/null
+++ b/test/plugins/inlineStyles.13.svg
@@ -0,0 +1,68 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 81.285 81.285">
+    <defs>
+        <style>
+
+            /* Simple Atrules */
+            @charset 'UTF-8';
+
+            @namespace svg url(http://www.w3.org/2000/svg);
+
+            @import url('https://fonts.googleapis.com/css?family=Roboto');
+
+            /* Atrules with block */
+            @font-face {
+                font-family: SomeFont;
+                src: local("Some Font"),
+                local("SomeFont"),
+                url(SomeFont.ttf);
+                font-weight: bold;
+            }
+
+            @viewport {
+                    zoom: 0.8;
+                min-zoom: 0.4;
+                max-zoom: 0.9;
+            }
+
+            @keyframes identifier {
+                  0% { top:  0; }
+                 50% { top: 30px; left: 20px; }
+                 50% { top: 10px; }
+                100% { top:  0; }
+            }
+
+
+            /* Nested rules */
+            @page :first {
+                margin: 1in;
+            }
+
+            @supports (display: flex) {
+                .module { display: flex; }
+            }
+
+            @document url('http://example.com/test.html') {
+                rect {
+                    stroke: red;
+                }
+            }
+
+
+            .blue {
+                fill: blue;
+            }
+    </style>
+    </defs>
+    <rect width="100" height="100" class="blue"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 81.285 81.285">
+    <defs>
+        <style>
+            @charset &apos;UTF-8&apos;;@namespace svg url(http://www.w3.org/2000/svg);@import url(&apos;https://fonts.googleapis.com/css?family=Roboto&apos;);@font-face{font-family: SomeFont;src: local(&quot;Some Font&quot;), local(&quot;SomeFont&quot;), url(SomeFont.ttf);font-weight: bold}@viewport{zoom: 0.8;min-zoom: 0.4;max-zoom: 0.9}@keyframes identifier{0%{top: 0}50%{top: 30px;left: 20px}50%{top: 10px}100%{top: 0}}@page :first{margin: 1in}@supports (display: flex){.module{display: flex}}@document url(&apos;http://example.com/test.html&apos;){rect{stroke: red}}
+        </style>
+    </defs>
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
diff --git a/test/plugins/inlineStyles.14.svg b/test/plugins/inlineStyles.14.svg
new file mode 100644
index 000000000..74e17a55f
--- /dev/null
+++ b/test/plugins/inlineStyles.14.svg
@@ -0,0 +1,25 @@
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 81.285 81.285">
+    <defs>
+        <style>
+            @media only screen
+            and (min-device-width: 320px)
+            and (max-device-width: 480px)
+            and (-webkit-min-device-pixel-ratio: 2) {
+
+                .blue { fill: blue; }
+
+            }
+        </style>
+    </defs>
+    <rect width="100" height="100" class="blue"/>
+</svg>
+
+@@@
+
+<svg id="test" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 81.285 81.285">
+    <rect width="100" height="100" style="fill:blue"/>
+</svg>
+
+@@@
+
+{"useMqs": ["media only screen and (min-device-width:320px) and (max-device-width:480px) and (-webkit-min-device-pixel-ratio:2)"]}
diff --git a/test/plugins/inlineStyles.15.svg b/test/plugins/inlineStyles.15.svg
new file mode 100644
index 000000000..eb9dabfc3
--- /dev/null
+++ b/test/plugins/inlineStyles.15.svg
@@ -0,0 +1,67 @@
+<?xml version="1.0" standalone="no"?>
+<svg viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <defs xmlns="http://www.w3.org/1999/xhtml">
+        <style type="text/css">
+            html /deep/ [layout][horizontal], html /deep/ [layout][vertical] { display: flex; }
+            html /deep/ [layout][horizontal][inline], html /deep/ [layout][vertical][inline] { display: inline-flex; }
+            html /deep/ [layout][horizontal] { flex-direction: row; }
+            html /deep/ [layout][horizontal][reverse] { flex-direction: row-reverse; }
+            html /deep/ [layout][vertical] { flex-direction: column; }
+            html /deep/ [layout][vertical][reverse] { flex-direction: column-reverse; }
+            html /deep/ [layout][wrap] { flex-wrap: wrap; }
+            html /deep/ [layout][wrap-reverse] { flex-wrap: wrap-reverse; }
+            html /deep/ [flex] { flex: 1 1 0px; }
+            html /deep/ [flex][auto] { flex: 1 1 auto; }
+            html /deep/ [flex][none] { flex: 0 0 auto; }
+            html /deep/ [flex][one] { flex: 1 1 0px; }
+            html /deep/ [flex][two] { flex: 2 1 0px; }
+            html /deep/ [flex][three] { flex: 3 1 0px; }
+            html /deep/ [flex][four] { flex: 4 1 0px; }
+            html /deep/ [flex][five] { flex: 5 1 0px; }
+            html /deep/ [flex][six] { flex: 6 1 0px; }
+            html /deep/ [flex][seven] { flex: 7 1 0px; }
+            html /deep/ [flex][eight] { flex: 8 1 0px; }
+            html /deep/ [flex][nine] { flex: 9 1 0px; }
+            html /deep/ [flex][ten] { flex: 10 1 0px; }
+            html /deep/ [flex][eleven] { flex: 11 1 0px; }
+            html /deep/ [flex][twelve] { flex: 12 1 0px; }
+            html /deep/ [layout][start] { align-items: flex-start; }
+            html /deep/ [layout][center] { align-items: center; }
+            html /deep/ [layout][end] { align-items: flex-end; }
+            html /deep/ [layout][start-justified] { justify-content: flex-start; }
+            html /deep/ [layout][center-justified] { justify-content: center; }
+            html /deep/ [layout][end-justified] { justify-content: flex-end; }
+            html /deep/ [layout][around-justified] { justify-content: space-around; }
+            html /deep/ [layout][justified] { justify-content: space-between; }
+            html /deep/ [self-start] { align-self: flex-start; }
+            html /deep/ [self-center] { align-self: center; }
+            html /deep/ [self-end] { align-self: flex-end; }
+            html /deep/ [self-stretch] { align-self: stretch; }
+            html /deep/ [block] { display: block; }
+            html /deep/ [hidden] { display: none !important; }
+            html /deep/ [relative] { position: relative; }
+            html /deep/ [fit] { position: absolute; top: 0px; right: 0px; bottom: 0px; left: 0px; }
+            body[fullbleed] { margin: 0px; height: 100vh; }
+            html /deep/ [segment], html /deep/ segment { display: block; position: relative; box-sizing: border-box; margin: 1em 0.5em; padding: 1em; -webkit-box-shadow: rgba(0, 0, 0, 0.0980392) 0px 0px 0px 1px; box-shadow: rgba(0, 0, 0, 0.0980392) 0px 0px 0px 1px; border-top-left-radius: 5px; border-top-right-radius: 5px; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; background-color: white; }
+            html /deep/ core-icon { display: inline-block; vertical-align: middle; background-repeat: no-repeat; }
+            html /deep/ core-icon[size=""] { position: relative; }
+        </style>
+    </defs>
+    <g id="airplanemode-on">
+        <path d="M10.2,9"/>
+    </g>
+</svg>
+
+@@@
+
+<?xml version="1.0" standalone="no"?>
+<svg viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <defs xmlns="http://www.w3.org/1999/xhtml">
+        <style type="text/css">
+            html /deep/ [layout][horizontal],html /deep/ [layout][vertical]{display: flex}html /deep/ [layout][horizontal][inline],html /deep/ [layout][vertical][inline]{display: inline-flex}html /deep/ [layout][horizontal]{flex-direction: row}html /deep/ [layout][horizontal][reverse]{flex-direction: row-reverse}html /deep/ [layout][vertical]{flex-direction: column}html /deep/ [layout][vertical][reverse]{flex-direction: column-reverse}html /deep/ [layout][wrap]{flex-wrap: wrap}html /deep/ [layout][wrap-reverse]{flex-wrap: wrap-reverse}html /deep/ [flex]{flex: 1 1 0px}html /deep/ [flex][auto]{flex: 1 1 auto}html /deep/ [flex][none]{flex: 0 0 auto}html /deep/ [flex][one]{flex: 1 1 0px}html /deep/ [flex][two]{flex: 2 1 0px}html /deep/ [flex][three]{flex: 3 1 0px}html /deep/ [flex][four]{flex: 4 1 0px}html /deep/ [flex][five]{flex: 5 1 0px}html /deep/ [flex][six]{flex: 6 1 0px}html /deep/ [flex][seven]{flex: 7 1 0px}html /deep/ [flex][eight]{flex: 8 1 0px}html /deep/ [flex][nine]{flex: 9 1 0px}html /deep/ [flex][ten]{flex: 10 1 0px}html /deep/ [flex][eleven]{flex: 11 1 0px}html /deep/ [flex][twelve]{flex: 12 1 0px}html /deep/ [layout][start]{align-items: flex-start}html /deep/ [layout][center]{align-items: center}html /deep/ [layout][end]{align-items: flex-end}html /deep/ [layout][start-justified]{justify-content: flex-start}html /deep/ [layout][center-justified]{justify-content: center}html /deep/ [layout][end-justified]{justify-content: flex-end}html /deep/ [layout][around-justified]{justify-content: space-around}html /deep/ [layout][justified]{justify-content: space-between}html /deep/ [self-start]{align-self: flex-start}html /deep/ [self-center]{align-self: center}html /deep/ [self-end]{align-self: flex-end}html /deep/ [self-stretch]{align-self: stretch}html /deep/ [block]{display: block}html /deep/ [hidden]{display: none !important}html /deep/ [relative]{position: relative}html /deep/ [fit]{position: absolute;top: 0px;right: 0px;bottom: 0px;left: 0px}body[fullbleed]{margin: 0px;height: 100vh}html /deep/ [segment],html /deep/ segment{display: block;position: relative;box-sizing: border-box;margin: 1em 0.5em;padding: 1em;-webkit-box-shadow: rgba(0, 0, 0, 0.0980392) 0px 0px 0px 1px;box-shadow: rgba(0, 0, 0, 0.0980392) 0px 0px 0px 1px;border-top-left-radius: 5px;border-top-right-radius: 5px;border-bottom-right-radius: 5px;border-bottom-left-radius: 5px;background-color: white}html /deep/ core-icon{display: inline-block;vertical-align: middle;background-repeat: no-repeat}html /deep/ core-icon[size=&quot;&quot;]{position: relative}
+        </style>
+    </defs>
+    <g id="airplanemode-on">
+        <path d="M10.2,9"/>
+    </g>
+</svg>
diff --git a/test/plugins/inlineStyles.16.svg b/test/plugins/inlineStyles.16.svg
new file mode 100644
index 000000000..bdcb1ad5a
--- /dev/null
+++ b/test/plugins/inlineStyles.16.svg
@@ -0,0 +1,40 @@
+<svg id="Ebene_1" data-name="Ebene 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 222 57.28">
+    <defs>
+        <style>
+            #id0 {
+                stroke: red;
+            }
+
+            .cls-1 {
+                fill: #37d0cd;
+            }
+
+            .cls-2{
+                fill: #fff;
+            }
+        </style>
+    </defs>
+    <title>button</title>
+    <rect id="id0" class="cls-1" width="222" height="57.28" rx="28.64" ry="28.64"/>
+    <path class="cls-2" d="M312.75,168.66A2.15,2.15,0,0,1,311.2,165L316,160l-4.8-5a2.15,2.15,0,1,1,3.1-3l6.21,6.49a2.15,2.15,0,0,1,0,3L314.31,168a2.14,2.14,0,0,1-1.56.67Zm0,0" transform="translate(-119 -131.36)"/>
+    <circle class="cls-2" cx="33.5" cy="27.25" r="2.94"/>
+    <circle class="cls-2" cx="162.5" cy="158.61" r="2.94" transform="translate(-181.03 61.15) rotate(-52.89)"/>
+    <circle class="cls-2" cx="172.5" cy="158.61" r="2.94" transform="translate(-157.03 -75.67) rotate(-16.55)"/>
+</svg>
+
+@@@
+
+<svg id="Ebene_1" data-name="Ebene 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 222 57.28">
+    <title>
+        button
+    </title>
+    <rect width="222" height="57.28" rx="28.64" ry="28.64" style="stroke:red;fill:#37d0cd"/>
+    <path d="M312.75,168.66A2.15,2.15,0,0,1,311.2,165L316,160l-4.8-5a2.15,2.15,0,1,1,3.1-3l6.21,6.49a2.15,2.15,0,0,1,0,3L314.31,168a2.14,2.14,0,0,1-1.56.67Zm0,0" transform="translate(-119 -131.36)" style="fill:#fff"/>
+    <circle cx="33.5" cy="27.25" r="2.94" style="fill:#fff"/>
+    <circle cx="162.5" cy="158.61" r="2.94" transform="translate(-181.03 61.15) rotate(-52.89)" style="fill:#fff"/>
+    <circle cx="172.5" cy="158.61" r="2.94" transform="translate(-157.03 -75.67) rotate(-16.55)" style="fill:#fff"/>
+</svg>
+
+@@@
+
+{"onlyMatchedOnce":false}
diff --git a/test/plugins/removeScriptElement.01.svg b/test/plugins/removeScriptElement.01.svg
index b3655db01..e242aa520 100644
--- a/test/plugins/removeScriptElement.01.svg
+++ b/test/plugins/removeScriptElement.01.svg
@@ -7,6 +7,6 @@
 @@@
 
 <?xml version="1.0" encoding="utf-16"?>
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100;" xml:space="preserve">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100" xml:space="preserve">
     <circle class="st0" cx="50" cy="50" r="50"/>
 </svg>
diff --git a/test/plugins/removeStyleElement.01.svg b/test/plugins/removeStyleElement.01.svg
index 2f3c52f88..c3d415091 100644
--- a/test/plugins/removeStyleElement.01.svg
+++ b/test/plugins/removeStyleElement.01.svg
@@ -11,6 +11,6 @@
 @@@
 
 <?xml version="1.0" encoding="utf-16"?>
-<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100;" xml:space="preserve">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 100 100" style="enable-background:new 0 0 100 100" xml:space="preserve">
     <circle class="st0" cx="50" cy="50" r="50"/>
 </svg>
\ No newline at end of file