diff --git a/bower.json b/bower.json
index b1c01525..8f491cbe 100644
--- a/bower.json
+++ b/bower.json
@@ -40,6 +40,6 @@
     "olark": "^1.0.0",
     "philip": "^1.3.3",
     "jquery": "3.1.0",
-    "smalltalk": "^2.0.0"
+    "smalltalk": "2.1.0"
   }
 }
diff --git a/modules/smalltalk/.bower.json b/modules/smalltalk/.bower.json
index 000be719..7993ccdf 100644
--- a/modules/smalltalk/.bower.json
+++ b/modules/smalltalk/.bower.json
@@ -23,15 +23,15 @@
     "example"
   ],
   "dependencies": {},
-  "version": "2.0.0",
-  "_release": "2.0.0",
+  "version": "2.1.0",
+  "_release": "2.1.0",
   "_resolution": {
     "type": "version",
-    "tag": "v2.0.0",
-    "commit": "55325c8ace27e53c002cb207981031a0adb083b7"
+    "tag": "v2.1.0",
+    "commit": "c94a49648f0ffff6f24e5770581b0528cc130664"
   },
   "_source": "https://github.com/coderaiser/smalltalk.git",
-  "_target": "^2.0.0",
+  "_target": "^2.1.0",
   "_originalSource": "smalltalk",
   "_direct": true
 }
\ No newline at end of file
diff --git a/modules/smalltalk/ChangeLog b/modules/smalltalk/ChangeLog
index 816d95f3..bd43495c 100644
--- a/modules/smalltalk/ChangeLog
+++ b/modules/smalltalk/ChangeLog
@@ -1,3 +1,16 @@
+2016.07.20, v2.1.0
+
+fix:
+- feature(package) add postcss, autoprefixer
+
+feature:
+- (smalltalk) hide all windows but first, no matter where they located in DOM
+- (travis) node v6
+- (package) add postcss, autoprefixer
+- (package) stylelint-config-standard v11.0.0
+- (package) stylelint v7.0.2
+
+
 2016.07.15, v2.0.0
 
 feature:
diff --git a/modules/smalltalk/css/smalltalk.css b/modules/smalltalk/css/smalltalk.css
index 0614b952..f1715111 100644
--- a/modules/smalltalk/css/smalltalk.css
+++ b/modules/smalltalk/css/smalltalk.css
@@ -1,17 +1,10 @@
 .smalltalk {
-    display: -webkit-flex;
-    display: -moz-box;
-    display: -ms-flexbox;
     display: flex;
     
     align-items: center;
     flex-direction: column;
     justify-content: center;
     
-    -webkit-transition: 200ms opacity;
-    -moz-transition: 200ms opacity;
-    -ms-transition: 200ms opacity;
-    -o-transition: 200ms opacity;
     transition: 200ms opacity;
     
     bottom: 0;
@@ -24,7 +17,8 @@
     
     z-index: 100;
 }
-.smalltalk + .smalltalk {
+
+.smalltalk:not(:first-of-type) {
     transition: ease 1s;
     display: none;
 }
@@ -68,9 +62,6 @@
     white-space: nowrap;
     max-width: 500px;
     
-    -webkit-user-select: none;
-    -moz-user-select: none;
-    -ms-user-select: none;
     user-select: none;
     color: #333;
     font-size: 120%;
@@ -94,9 +85,6 @@
 }
 
 .smalltalk .page .button-strip {
-    display: -webkit-box;
-    display: -moz-box;
-    display: -ms-flexbox;
     display: flex;
     
     flex-direction: row;
@@ -104,27 +92,17 @@
 }
 
 .smalltalk .page .button-strip > button {
-    -webkit-margin-start: 10px;
-    -moz-margin-start: 10px;
-    -ms-margin-start: 10px;
+    margin-left: 10px;
 }
 
 .smalltalk button:enabled:focus, .smalltalk input:enabled:focus {
-    -webkit-transition: border-color 200ms;
-    -moz-transition: border-color 200ms;
-    -ms-transition: border-color 200ms;
-    -o-transition: border-color 200ms;
     transition: border-color 200ms;
     border-color: rgb(77, 144, 254);
     outline: none;
 }
 
 .smalltalk button:enabled:active {
-    background-image: -webkit-linear-gradient(#e7e7e7, #e7e7e7 38%, #d7d7d7);
-    background-image: -moz-linear-gradient(#e7e7e7, #e7e7e7 38%, #d7d7d7);
-    background-image: -ms-linear-gradient(#e7e7e7, #e7e7e7 38%, #d7d7d7);
     background-image: linear-gradient(#e7e7e7, #e7e7e7 38%, #d7d7d7);
-    
     box-shadow: none;
     text-shadow: none;
 }
@@ -139,19 +117,8 @@
 }
 
 .smalltalk button {
-    -webkit-appearance: none;
-    -moz-appearance: none;
-    -ms-appearance: none;
     appearance: none;
-    
-    -webkit-user-select: none;
-    -moz-user-select: none;
-    -ms-user-select: none;
     user-select: none;
-    
-    background-image: -webkit-linear-gradient(#ededed, #ededed 38%, #dedede);
-    background-image: -moz-linear-gradient(#ededed, #ededed 38%, #dedede);
-    background-image: -ms-linear-gradient(#ededed, #ededed 38%, #dedede);
     background-image: linear-gradient(#ededed, #ededed 38%, #dedede);
     
     border: 1px solid rgb(0, 0, 0);
@@ -165,10 +132,6 @@
 }
 
 .smalltalk button:enabled:focus, .smalltalk input:enabled:focus {
-    -webkit-transition: border-color 200ms;
-    -moz-transition: border-color 200ms;
-    -ms-transition: border-color 200ms;
-    -o-transition: border-color 200ms;
     transition: border-color 200ms;
     border-color: rgb(77, 144, 254);
     outline: none;
diff --git a/modules/smalltalk/dist/smalltalk.min.css b/modules/smalltalk/dist/smalltalk.min.css
index c0b36c41..27ca31a7 100644
--- a/modules/smalltalk/dist/smalltalk.min.css
+++ b/modules/smalltalk/dist/smalltalk.min.css
@@ -1 +1 @@
-.smalltalk{display:-webkit-flex;display:-moz-box;display:-ms-flexbox;display:flex;align-items:center;flex-direction:column;justify-content:center;-webkit-transition:.2s opacity;-moz-transition:.2s opacity;-ms-transition:.2s opacity;-o-transition:.2s opacity;transition:.2s opacity;bottom:0;left:0;overflow:auto;padding:20px;position:fixed;right:0;top:0;z-index:100}.smalltalk .page .content-area,.smalltalk .page header{overflow:hidden;text-overflow:ellipsis;max-width:500px}.smalltalk+.smalltalk{transition:ease 1s;display:none}.smalltalk .page{border-radius:3px;background:#fff;box-shadow:0 4px 23px 5px rgba(0,0,0,.2),0 2px 6px rgba(0,0,0,.15);color:#333;min-width:400px;padding:0;position:relative;z-index:0}@media only screen and (max-width:500px){.smalltalk .page{min-width:0}}.smalltalk .page>.close-button{background-image:url(../img/IDR_CLOSE_DIALOG.png);background-position:center;background-repeat:no-repeat;height:14px;position:absolute;right:7px;top:7px;width:14px;z-index:1}.smalltalk .page>.close-button:hover{background-image:url(../img/IDR_CLOSE_DIALOG_H.png)}.smalltalk .page header{white-space:nowrap;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:#333;font-size:120%;font-weight:700;margin:0;padding:14px 17px;text-shadow:#fff 0 1px 2px}.smalltalk .page .content-area{padding:6px 17px;position:relative}.smalltalk .page .action-area{padding:14px 17px}.smalltalk .page .button-strip{display:-webkit-box;display:-moz-box;display:-ms-flexbox;display:flex;flex-direction:row;justify-content:flex-end}.smalltalk .page .button-strip>button{-webkit-margin-start:10px;-moz-margin-start:10px;-ms-margin-start:10px}.smalltalk button:enabled:active{background-image:-webkit-linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);background-image:-moz-linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);background-image:-ms-linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);background-image:linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);box-shadow:none;text-shadow:none}.smalltalk .smalltalk,.smalltalk button{min-height:2em;min-width:4em}.smalltalk button::-moz-focus-inner{border:0}.smalltalk button{-webkit-appearance:none;-moz-appearance:none;-ms-appearance:none;appearance:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;background-image:-webkit-linear-gradient(#ededed,#ededed 38%,#dedede);background-image:-moz-linear-gradient(#ededed,#ededed 38%,#dedede);background-image:-ms-linear-gradient(#ededed,#ededed 38%,#dedede);background-image:linear-gradient(#ededed,#ededed 38%,#dedede);border:1px solid #000;border:1px solid rgba(0,0,0,.25);border-radius:2px;box-shadow:0 1px 0 rgba(0,0,0,.08),inset 0 1px 2px rgba(255,255,255,.75);color:#444;font:inherit;margin:0 1px 0 0;text-shadow:0 1px 0 #f0f0f0}.smalltalk button:enabled:focus,.smalltalk input:enabled:focus{-webkit-transition:border-color .2s;-moz-transition:border-color .2s;-ms-transition:border-color .2s;-o-transition:border-color .2s;transition:border-color .2s;border-color:#4d90fe;outline:0}.smalltalk input{width:100%;border:1px solid #bfbfbf;border-radius:2px;box-sizing:border-box;color:#444;font:inherit;margin:0;min-height:2em;padding:3px;outline:0}button{font-family:Ubuntu,Arial,sans-serif}
+.smalltalk{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-align:center;-ms-flex-align:center;align-items:center;-webkit-box-orient:vertical;-webkit-box-direction:normal;-ms-flex-direction:column;flex-direction:column;-webkit-box-pack:center;-ms-flex-pack:center;justify-content:center;-webkit-transition:.2s opacity;transition:.2s opacity;bottom:0;left:0;overflow:auto;padding:20px;position:fixed;right:0;top:0;z-index:100}.smalltalk .page .content-area,.smalltalk .page header{overflow:hidden;text-overflow:ellipsis;max-width:500px}.smalltalk:not(:first-of-type){-webkit-transition:ease 1s;transition:ease 1s;display:none}.smalltalk .page{border-radius:3px;background:#fff;box-shadow:0 4px 23px 5px rgba(0,0,0,.2),0 2px 6px rgba(0,0,0,.15);color:#333;min-width:400px;padding:0;position:relative;z-index:0}@media only screen and (max-width:500px){.smalltalk .page{min-width:0}}.smalltalk .page>.close-button{background-image:url(../img/IDR_CLOSE_DIALOG.png);background-position:center;background-repeat:no-repeat;height:14px;position:absolute;right:7px;top:7px;width:14px;z-index:1}.smalltalk .page>.close-button:hover{background-image:url(../img/IDR_CLOSE_DIALOG_H.png)}.smalltalk .page header{white-space:nowrap;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;color:#333;font-size:120%;font-weight:700;margin:0;padding:14px 17px;text-shadow:#fff 0 1px 2px}.smalltalk .page .content-area{padding:6px 17px;position:relative}.smalltalk .page .action-area{padding:14px 17px}.smalltalk .page .button-strip{display:-webkit-box;display:-ms-flexbox;display:flex;-webkit-box-orient:horizontal;-webkit-box-direction:normal;-ms-flex-direction:row;flex-direction:row;-webkit-box-pack:end;-ms-flex-pack:end;justify-content:flex-end}.smalltalk .page .button-strip>button{margin-left:10px}.smalltalk button:enabled:active{background-image:-webkit-linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);background-image:linear-gradient(#e7e7e7,#e7e7e7 38%,#d7d7d7);box-shadow:none;text-shadow:none}.smalltalk .smalltalk,.smalltalk button{min-height:2em;min-width:4em}.smalltalk button::-moz-focus-inner{border:0}.smalltalk button{-webkit-appearance:none;-moz-appearance:none;appearance:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;background-image:-webkit-linear-gradient(#ededed,#ededed 38%,#dedede);background-image:linear-gradient(#ededed,#ededed 38%,#dedede);border:1px solid #000;border:1px solid rgba(0,0,0,.25);border-radius:2px;box-shadow:0 1px 0 rgba(0,0,0,.08),inset 0 1px 2px rgba(255,255,255,.75);color:#444;font:inherit;margin:0 1px 0 0;text-shadow:0 1px 0 #f0f0f0}.smalltalk button:enabled:focus,.smalltalk input:enabled:focus{-webkit-transition:border-color .2s;transition:border-color .2s;border-color:#4d90fe;outline:0}.smalltalk input{width:100%;border:1px solid #bfbfbf;border-radius:2px;box-sizing:border-box;color:#444;font:inherit;margin:0;min-height:2em;padding:3px;outline:0}button{font-family:Ubuntu,Arial,sans-serif}
diff --git a/modules/smalltalk/package.json b/modules/smalltalk/package.json
index f8b4f9bc..9087f4df 100644
--- a/modules/smalltalk/package.json
+++ b/modules/smalltalk/package.json
@@ -1,6 +1,6 @@
 {
   "name": "smalltalk",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "Promise-based Alert, Confirm and Prompt replacement",
   "homepage": "http://github.com/coderaiser/smalltalk",
   "repository": {
@@ -18,20 +18,24 @@
   },
   "scripts": {
     "watch": "watch 'npm run 6to5' dist",
-    "6to5": "babel -d legacy lib",
-    "minify:css": "minify css/smalltalk.css > dist/smalltalk.min.css",
+    "compile:js": "babel -d legacy lib",
+    "compile:css": "postcss --use autoprefixer css/*.css -d dist",
+    "minify:css": "minify dist/smalltalk.css > dist/smalltalk.min.css",
     "minify:js": "minify dist/smalltalk.js > dist/smalltalk.min.js",
     "minify:js-native": "minify dist/smalltalk.native.js > dist/smalltalk.native.min.js",
     "build:js-poly": "cat $npm_package_config_poly dist/smalltalk.min.js > dist/smalltalk.poly.min.js",
     "build:js-poly-native": "cat $npm_package_config_poly dist/smalltalk.native.min.js > dist/smalltalk.native.poly.min.js",
     "build:js-full": "redrun bundle:js minify:js build:js-poly",
     "build:js-native-full": "redrun bundle:js:native minify:js-native build:js-poly-native",
-    "build": "redrun minify:css 6to5 build:js-full build:js-native-full legacy:index clean",
+    "build": "redrun build:js build:css",
+    "build:js": "redrun compile:js build:js-full build:js-native-full legacy:index clean:js",
+    "build:css": "redrun compile:css minify:css clean:css",
     "bundle:base": "browserify -s smalltalk --ng false",
     "bundle:js": "redrun bundle:base -- -r ./legacy/smalltalk.js:smalltalk ./legacy/smalltalk.js -o dist/smalltalk.js",
     "bundle:js:native": "redrun bundle:base -- -r ./legacy/smalltalk.native.js:smalltalk ./legacy/smalltalk.native.js -o dist/smalltalk.native.js",
     "legacy:index": "echo \"module.exports = require('./smalltalk');\" > legacy/index.js",
-    "clean": "rimraf dist/smalltalk.js dist/smalltalk.native.js",
+    "clean:js": "rimraf dist/smalltalk.js dist/smalltalk.native.js",
+    "clean:css": "rimraf dist/smalltalk.css",
     "bower": "bower",
     "babel": "babel",
     "minify": "minify",
@@ -53,6 +57,7 @@
     "url": "https://github.com/coderaiser/smalltalk/issues"
   },
   "devDependencies": {
+    "autoprefixer": "^6.3.7",
     "babel-cli": "^6.1.1",
     "babel-preset-es2015": "^6.0.15",
     "browserify": "^13.0.1",
@@ -60,11 +65,12 @@
     "jscs": "^3.0.3",
     "jshint": "^2.8.0",
     "minify": "^2.0.0",
+    "postcss-cli": "^2.5.2",
     "promise-polyfill": "^5.1.0",
     "redrun": "^5.0.1",
     "rimraf": "^2.5.3",
-    "stylelint": "^6.2.2",
-    "stylelint-config-standard": "^10.0.0",
+    "stylelint": "^7.0.2",
+    "stylelint-config-standard": "^11.0.0",
     "systemjs": "^0.19.31",
     "watch": "^0.19.1"
   }