Merge pull request #36 from picturepan2/feature/more-layoutv0.1.19

Feature/more layout

20 files changed, 770 insertions, 527 deletions

diff --git a/README.md b/README.md
index 5f01dc2..5b54083 100644
--- a/README.md
+++ b/README.md
@@ -35,12 +35,17 @@ You can compiling your custom version of Spectre.css. Read [the documentation](h
 #### Elements
 
 - [typography](http://picturepan2.github.io/spectre/#typography) - headings, paragraphs, blockquote, lists and code elements, optimized for asian fonts
-- [layout](http://picturepan2.github.io/spectre/#layout) - flexbox based responsive layout system
 - [tables](http://picturepan2.github.io/spectre/#tables) - organize and display data
 - [buttons](http://picturepan2.github.io/spectre/#buttons) - button styles in different types and sizes, and even button groups
 - [forms](http://picturepan2.github.io/spectre/#forms) - input, radio, checkbox, switch and other form elements
 - [media](http://picturepan2.github.io/spectre/#media) - responsive image and video class
 
+#### Layout
+- [flexbox-grid](http://picturepan2.github.io/spectre/#grid) - flexbox based responsive grid system
+- [responsive](http://picturepan2.github.io/spectre/#responsive) - responsive grid and utilities
+- [navbar](http://picturepan2.github.io/spectre/#navbar) - header layout of apps and websites
+- [empty states](http://picturepan2.github.io/spectre/#empty) - empty states/blank slates for first time use, empty data and error screens
+
 #### Components
 
 - [avatars](http://picturepan2.github.io/spectre/#avatars) - user profile pictures or name initials rendered avatar
diff --git a/bower.json b/bower.json
index c63478f..5de1586 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "spectre.css",
-  "version": "0.1.18",
+  "version": "0.1.19",
   "description": "Spectre.css: a lightweight, responsive and modern CSS framework.",
   "homepage": "http://picturepan2.github.io/spectre",
   "repository": "picturepan2/spectre",
diff --git a/dist/spectre.css b/dist/spectre.css
index 89ae1d7..fdb7b99 100644
--- a/dist/spectre.css
+++ b/dist/spectre.css
@@ -368,7 +368,7 @@ textarea {
 html {
   box-sizing: border-box;
   font-size: 10px;
-  line-height: 1.428571429;
+  line-height: 1.42857143;
   -webkit-tap-highlight-color: transparent;
 }
 body {
@@ -513,306 +513,6 @@ pre code {
   margin-bottom: 0;
   margin-top: 0;
 }
-.container {
-  margin-left: auto;
-  margin-right: auto;
-  overflow-x: hidden;
-  padding-left: 1rem;
-  padding-right: 1rem;
-  width: 100%;
-}
-@media screen and (min-width: 981px) {
-  .grid-960 {
-    margin-left: auto;
-    margin-right: auto;
-    width: 96rem;
-  }
-}
-@media screen and (min-width: 481px) {
-  .grid-480 {
-    margin-left: auto;
-    margin-right: auto;
-    width: 48rem;
-  }
-}
-.columns {
-  display: flex;
-  display: -ms-flexbox;
-  display: -webkit-flex;
-  margin-left: -1rem;
-  margin-right: -1rem;
-}
-.column {
-  -webkit-flex: 1;
-  -ms-flex: 1;
-  flex: 1;
-  padding: 1rem;
-}
-.column.col-12,
-.column.col-11,
-.column.col-10,
-.column.col-9,
-.column.col-8,
-.column.col-7,
-.column.col-6,
-.column.col-5,
-.column.col-4,
-.column.col-3,
-.column.col-2,
-.column.col-1 {
-  -webkit-flex: none;
-  -ms-flex: none;
-  flex: none;
-}
-.col-12 {
-  width: 100%;
-}
-.col-11 {
-  width: 91.66666667%;
-}
-.col-10 {
-  width: 83.33333333%;
-}
-.col-9 {
-  width: 75%;
-}
-.col-8 {
-  width: 66.66666667%;
-}
-.col-7 {
-  width: 58.33333333%;
-}
-.col-6 {
-  width: 50%;
-}
-.col-5 {
-  width: 41.66666667%;
-}
-.col-4 {
-  width: 33.33333333%;
-}
-.col-3 {
-  width: 25%;
-}
-.col-2 {
-  width: 16.66666667%;
-}
-.col-1 {
-  width: 8.33333333%;
-}
-@media screen and (min-width: 481px) {
-  .col-xs-12,
-  .col-xs-11,
-  .col-xs-10,
-  .col-xs-9,
-  .col-xs-8,
-  .col-xs-7,
-  .col-xs-6,
-  .col-xs-5,
-  .col-xs-4,
-  .col-xs-3,
-  .col-xs-2,
-  .col-xs-1 {
-    -webkit-flex: none;
-    -ms-flex: none;
-    flex: none;
-  }
-  .col-xs-12 {
-    width: 100%;
-  }
-  .col-xs-11 {
-    width: 91.66666667%;
-  }
-  .col-xs-10 {
-    width: 83.33333333%;
-  }
-  .col-xs-9 {
-    width: 75%;
-  }
-  .col-xs-8 {
-    width: 66.66666667%;
-  }
-  .col-xs-7 {
-    width: 58.33333333%;
-  }
-  .col-xs-6 {
-    width: 50%;
-  }
-  .col-xs-5 {
-    width: 41.66666667%;
-  }
-  .col-xs-4 {
-    width: 33.33333333%;
-  }
-  .col-xs-3 {
-    width: 25%;
-  }
-  .col-xs-2 {
-    width: 16.66666667%;
-  }
-  .col-xs-1 {
-    width: 8.33333333%;
-  }
-}
-@media screen and (min-width: 601px) {
-  .col-sm-12,
-  .col-sm-11,
-  .col-sm-10,
-  .col-sm-9,
-  .col-sm-8,
-  .col-sm-7,
-  .col-sm-6,
-  .col-sm-5,
-  .col-sm-4,
-  .col-sm-3,
-  .col-sm-2,
-  .col-sm-1 {
-    -webkit-flex: none;
-    -ms-flex: none;
-    flex: none;
-  }
-  .col-sm-12 {
-    width: 100%;
-  }
-  .col-sm-11 {
-    width: 91.66666667%;
-  }
-  .col-sm-10 {
-    width: 83.33333333%;
-  }
-  .col-sm-9 {
-    width: 75%;
-  }
-  .col-sm-8 {
-    width: 66.66666667%;
-  }
-  .col-sm-7 {
-    width: 58.33333333%;
-  }
-  .col-sm-6 {
-    width: 50%;
-  }
-  .col-sm-5 {
-    width: 41.66666667%;
-  }
-  .col-sm-4 {
-    width: 33.33333333%;
-  }
-  .col-sm-3 {
-    width: 25%;
-  }
-  .col-sm-2 {
-    width: 16.66666667%;
-  }
-  .col-sm-1 {
-    width: 8.33333333%;
-  }
-}
-@media screen and (min-width: 841px) {
-  .col-md-12,
-  .col-md-11,
-  .col-md-10,
-  .col-md-9,
-  .col-md-8,
-  .col-md-7,
-  .col-md-6,
-  .col-md-5,
-  .col-md-4,
-  .col-md-3,
-  .col-md-2,
-  .col-md-1 {
-    -webkit-flex: none;
-    -ms-flex: none;
-    flex: none;
-  }
-  .col-md-12 {
-    width: 100%;
-  }
-  .col-md-11 {
-    width: 91.66666667%;
-  }
-  .col-md-10 {
-    width: 83.33333333%;
-  }
-  .col-md-9 {
-    width: 75%;
-  }
-  .col-md-8 {
-    width: 66.66666667%;
-  }
-  .col-md-7 {
-    width: 58.33333333%;
-  }
-  .col-md-6 {
-    width: 50%;
-  }
-  .col-md-5 {
-    width: 41.66666667%;
-  }
-  .col-md-4 {
-    width: 33.33333333%;
-  }
-  .col-md-3 {
-    width: 25%;
-  }
-  .col-md-2 {
-    width: 16.66666667%;
-  }
-  .col-md-1 {
-    width: 8.33333333%;
-  }
-}
-@media screen and (min-width: 841px) {
-  .form-horizontal {
-    padding: 1rem;
-  }
-  .form-horizontal .form-group {
-    display: flex;
-    display: -ms-flexbox;
-    display: -webkit-flex;
-  }
-  .form-horizontal .form-label {
-    margin-bottom: 0;
-    padding: .8rem .4rem;
-  }
-  .form-horizontal .form-checkbox,
-  .form-horizontal .form-radio {
-    margin: .5rem 0;
-  }
-}
-@media screen and (max-width: 480px) {
-  .columns {
-    display: block;
-  }
-  .columns .column {
-    width: 100%;
-  }
-}
-@media screen and (max-width: 480px) {
-  .hide-xs {
-    display: none !important;
-  }
-}
-@media screen and (max-width: 600px) {
-  .hide-sm {
-    display: none !important;
-  }
-}
-@media screen and (max-width: 840px) {
-  .hide-md {
-    display: none !important;
-  }
-}
-@media screen and (max-width: 960px) {
-  .hide-lg {
-    display: none !important;
-  }
-}
-@media screen and (max-width: 1280px) {
-  .hide-xl {
-    display: none !important;
-  }
-}
 .img-responsive {
   display: block;
   height: auto;
@@ -1212,7 +912,7 @@ textarea.form-input {
   display: -webkit-flex;
 }
 .input-group .input-group-addon {
-  background: #efefef;
+  background: #f9f9f9;
   border: .1rem solid #c5c5c5;
   border-radius: .3rem;
   line-height: 1.6rem;
@@ -1248,6 +948,340 @@ textarea.form-input {
 .input-group .input-group-btn:focus {
   z-index: 99;
 }
+.form-inline {
+  display: inline-block;
+  vertical-align: middle;
+  width: auto;
+}
+.container {
+  margin-left: auto;
+  margin-right: auto;
+  overflow-x: hidden;
+  padding-left: 1rem;
+  padding-right: 1rem;
+  width: 100%;
+}
+@media screen and (min-width: 980px) {
+  .grid-960 {
+    width: 98rem;
+  }
+}
+@media screen and (min-width: 500px) {
+  .grid-480 {
+    width: 50rem;
+  }
+}
+.columns {
+  display: flex;
+  display: -ms-flexbox;
+  display: -webkit-flex;
+  margin-left: -1rem;
+  margin-right: -1rem;
+}
+.column {
+  -webkit-flex: 1;
+  -ms-flex: 1;
+  flex: 1;
+  padding: 1rem;
+}
+.column.col-12,
+.column.col-11,
+.column.col-10,
+.column.col-9,
+.column.col-8,
+.column.col-7,
+.column.col-6,
+.column.col-5,
+.column.col-4,
+.column.col-3,
+.column.col-2,
+.column.col-1 {
+  -webkit-flex: none;
+  -ms-flex: none;
+  flex: none;
+}
+.col-12 {
+  width: 100%;
+}
+.col-11 {
+  width: 91.66666667%;
+}
+.col-10 {
+  width: 83.33333333%;
+}
+.col-9 {
+  width: 75%;
+}
+.col-8 {
+  width: 66.66666667%;
+}
+.col-7 {
+  width: 58.33333333%;
+}
+.col-6 {
+  width: 50%;
+}
+.col-5 {
+  width: 41.66666667%;
+}
+.col-4 {
+  width: 33.33333333%;
+}
+.col-3 {
+  width: 25%;
+}
+.col-2 {
+  width: 16.66666667%;
+}
+.col-1 {
+  width: 8.33333333%;
+}
+@media screen and (min-width: 481px) {
+  .col-xs-12,
+  .col-xs-11,
+  .col-xs-10,
+  .col-xs-9,
+  .col-xs-8,
+  .col-xs-7,
+  .col-xs-6,
+  .col-xs-5,
+  .col-xs-4,
+  .col-xs-3,
+  .col-xs-2,
+  .col-xs-1 {
+    -webkit-flex: none;
+    -ms-flex: none;
+    flex: none;
+  }
+  .col-xs-12 {
+    width: 100%;
+  }
+  .col-xs-11 {
+    width: 91.66666667%;
+  }
+  .col-xs-10 {
+    width: 83.33333333%;
+  }
+  .col-xs-9 {
+    width: 75%;
+  }
+  .col-xs-8 {
+    width: 66.66666667%;
+  }
+  .col-xs-7 {
+    width: 58.33333333%;
+  }
+  .col-xs-6 {
+    width: 50%;
+  }
+  .col-xs-5 {
+    width: 41.66666667%;
+  }
+  .col-xs-4 {
+    width: 33.33333333%;
+  }
+  .col-xs-3 {
+    width: 25%;
+  }
+  .col-xs-2 {
+    width: 16.66666667%;
+  }
+  .col-xs-1 {
+    width: 8.33333333%;
+  }
+}
+@media screen and (min-width: 601px) {
+  .col-sm-12,
+  .col-sm-11,
+  .col-sm-10,
+  .col-sm-9,
+  .col-sm-8,
+  .col-sm-7,
+  .col-sm-6,
+  .col-sm-5,
+  .col-sm-4,
+  .col-sm-3,
+  .col-sm-2,
+  .col-sm-1 {
+    -webkit-flex: none;
+    -ms-flex: none;
+    flex: none;
+  }
+  .col-sm-12 {
+    width: 100%;
+  }
+  .col-sm-11 {
+    width: 91.66666667%;
+  }
+  .col-sm-10 {
+    width: 83.33333333%;
+  }
+  .col-sm-9 {
+    width: 75%;
+  }
+  .col-sm-8 {
+    width: 66.66666667%;
+  }
+  .col-sm-7 {
+    width: 58.33333333%;
+  }
+  .col-sm-6 {
+    width: 50%;
+  }
+  .col-sm-5 {
+    width: 41.66666667%;
+  }
+  .col-sm-4 {
+    width: 33.33333333%;
+  }
+  .col-sm-3 {
+    width: 25%;
+  }
+  .col-sm-2 {
+    width: 16.66666667%;
+  }
+  .col-sm-1 {
+    width: 8.33333333%;
+  }
+}
+@media screen and (min-width: 841px) {
+  .col-md-12,
+  .col-md-11,
+  .col-md-10,
+  .col-md-9,
+  .col-md-8,
+  .col-md-7,
+  .col-md-6,
+  .col-md-5,
+  .col-md-4,
+  .col-md-3,
+  .col-md-2,
+  .col-md-1 {
+    -webkit-flex: none;
+    -ms-flex: none;
+    flex: none;
+  }
+  .col-md-12 {
+    width: 100%;
+  }
+  .col-md-11 {
+    width: 91.66666667%;
+  }
+  .col-md-10 {
+    width: 83.33333333%;
+  }
+  .col-md-9 {
+    width: 75%;
+  }
+  .col-md-8 {
+    width: 66.66666667%;
+  }
+  .col-md-7 {
+    width: 58.33333333%;
+  }
+  .col-md-6 {
+    width: 50%;
+  }
+  .col-md-5 {
+    width: 41.66666667%;
+  }
+  .col-md-4 {
+    width: 33.33333333%;
+  }
+  .col-md-3 {
+    width: 25%;
+  }
+  .col-md-2 {
+    width: 16.66666667%;
+  }
+  .col-md-1 {
+    width: 8.33333333%;
+  }
+}
+@media screen and (min-width: 841px) {
+  .form-horizontal {
+    padding: 1rem;
+  }
+  .form-horizontal .form-group {
+    display: flex;
+    display: -ms-flexbox;
+    display: -webkit-flex;
+  }
+  .form-horizontal .form-label {
+    margin-bottom: 0;
+    padding: .8rem .4rem;
+  }
+  .form-horizontal .form-checkbox,
+  .form-horizontal .form-radio {
+    margin: .5rem 0;
+  }
+}
+@media screen and (max-width: 480px) {
+  .columns {
+    display: block;
+  }
+  .columns .column {
+    width: 100%;
+  }
+}
+@media screen and (max-width: 480px) {
+  .hide-xs {
+    display: none !important;
+  }
+}
+@media screen and (max-width: 600px) {
+  .hide-sm {
+    display: none !important;
+  }
+}
+@media screen and (max-width: 840px) {
+  .hide-md {
+    display: none !important;
+  }
+}
+@media screen and (max-width: 960px) {
+  .hide-lg {
+    display: none !important;
+  }
+}
+@media screen and (max-width: 1280px) {
+  .hide-xl {
+    display: none !important;
+  }
+}
+.navbar {
+  -webkit-align-items: center;
+  align-items: center;
+  display: flex;
+  display: -ms-flexbox;
+  display: -webkit-flex;
+  -ms-flex-align: center;
+  -ms-flex-pack: justify;
+  -webkit-justify-content: space-between;
+  justify-content: space-between;
+  padding: 1rem;
+}
+.navbar .navbar-brand {
+  font-size: 2rem;
+  text-decoration: none;
+  vertical-align: middle;
+}
+.empty {
+  background: #f8f8f8;
+  border-radius: .3rem;
+  padding: 2rem;
+  text-align: center;
+}
+.empty .empty-title {
+  font-size: 1.8rem;
+  margin: 1.5rem 0 .5rem 0;
+}
+.empty .empty-meta {
+  color: #888;
+}
+.empty .btn {
+  margin-top: 1.5rem;
+}
 .avatar {
   border-radius: 50%;
   display: inline-block;
diff --git a/dist/spectre.min.css b/dist/spectre.min.css
index 099f028..794f426 100644
--- a/dist/spectre.min.css
+++ b/dist/spectre.min.css
@@ -1 +1 @@
-/*! normalize.css v4.0.0 | MIT License | github.com/necolas/normalize.css */a,abbr[title]{text-decoration:underline}progress,sub,sup{vertical-align:baseline}button,hr,input,select{overflow:visible}html,legend{box-sizing:border-box}pre,textarea{overflow:auto}blockquote p:last-child,pre code{margin-bottom:0}.btn-group .btn:focus,.btn-group .btn:hover,.input-group .form-input:focus,.input-group .input-group-addon:focus,.input-group .input-group-btn:focus{z-index:99}html{font-family:sans-serif;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}article,aside,details,figcaption,figure,footer,header,main,menu,nav,section,summary{display:block}audio,canvas,progress,video{display:inline-block}audio:not([controls]){display:none;height:0}[hidden],template{display:none}a{background-color:transparent;color:#5764c6}a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline dotted}b,strong{font-weight:bolder}dfn{font-style:italic}h1{margin:.67em 0}mark{background-color:#ff0;color:#000}small{font-size:80%}sub,sup{font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}img{border-style:none}svg:not(:root){overflow:hidden}code,kbd,pre,samp{font-family:monospace,monospace;font-size:1em}figure{margin:1em 40px}hr{box-sizing:content-box;height:0}button,input,select,textarea{font:inherit;margin:0}optgroup{font-weight:700}button,select{text-transform:none}[type=button],[type=reset],[type=submit],button{cursor:pointer}[disabled]{cursor:default}[type=reset],[type=submit],button,html [type=button]{-webkit-appearance:button}button::-moz-focus-inner,input::-moz-focus-inner{border:0;padding:0}button:-moz-focusring,input:-moz-focusring{outline:ButtonText dotted 1px}fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em 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.btn{margin-top:1.5rem}.avatar{border-radius:50%;display:inline-block;font-size:1.4rem;font-weight:300;height:3.2rem;line-height:1;margin:0;position:relative;width:3.2rem}.avatar.avatar-xs{font-size:.8rem;height:1.6rem;width:1.6rem}.avatar.avatar-sm{font-size:1rem;height:2.4rem;width:2.4rem}.avatar.avatar-lg{font-size:2rem;height:4.8rem;width:4.8rem}.avatar.avatar-xl{font-size:2.6rem;height:6.4rem;width:6.4rem}.avatar img{border-radius:50%;height:100%;width:100%}.avatar .avatar-icon{background:#fff;bottom:-.2em;height:50%;padding:5%;position:absolute;right:-.2em;width:50%}.avatar[data-initial]::after{color:#fff;content:attr(data-initial);left:50%;position:absolute;top:50%;-webkit-transform:translate(-50%,-50%);transform:translate(-50%,-50%)}@-webkit-keyframes loading{0%{-webkit-transform:rotate(0);transform:rotate(0)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@keyframes loading{0%{-webkit-transform:rotate(0);transform:rotate(0)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@-webkit-keyframes slide-down{0%{margin-top:-3rem;opacity:0}100%{margin-top:0;opacity:1}}@keyframes slide-down{0%{margin-top:-3rem;opacity:0}100%{margin-top:0;opacity:1}}.form-autocomplete{position:relative}.form-autocomplete .form-autocomplete-input{background:#fff;border:.1rem solid #c5c5c5;border-radius:.3rem;color:#333;display:block;font-size:1.4rem;line-height:1.6rem;max-width:100%;min-height:3.2rem;outline:0;padding:.3rem .3rem 0;width:100%}.form-autocomplete .form-autocomplete-input .chip-sm{margin-bottom:.3rem}.form-autocomplete .form-autocomplete-input .form-input{background:#fff;border-color:transparent;display:inline-block;height:2.4rem;margin-bottom:.3rem;padding:.3rem;vertical-align:top;width:auto}.form-autocomplete .form-autocomplete-list{background:#fff;border:.1rem solid #d2d2d2;border-radius:.3rem;box-shadow:0 .1rem .2rem rgba(0,0,0,.15);display:block;height:auto;left:0;margin:.3rem 0 0;padding:.5rem;position:absolute;top:100%;width:100%;z-index:1988}.menu,.modal-container,.shadow{box-shadow:0 .1rem .4rem rgba(0,0,0,.3)}.form-autocomplete .form-autocomplete-item{border-radius:.3rem;display:block;margin-top:.1rem;padding:.2rem 1rem}.form-autocomplete .form-autocomplete-item:focus,.form-autocomplete .form-autocomplete-item:hover{background:#f7f8fc}.form-autocomplete .form-autocomplete-item.active{background:#eff1fa}.badge{position:relative}.badge[data-badge]::after{background:#5764c6;background-clip:padding-box;border:.1rem solid #fff;border-radius:1rem;color:#fff;content:attr(data-badge);display:inline-block;font-size:1.1rem;height:1.8rem;line-height:1.2rem;min-width:1.8rem;padding:.2rem .5rem;text-align:center;-webkit-transform:translate(-.2rem,-.8rem);transform:translate(-.2rem,-.8rem);white-space:nowrap}.card,.menu{display:block;z-index:999}.card,.menu,.text-left{text-align:left}.card{background:#fff;border:.1rem solid #efefef;border-radius:.3rem;margin:0;padding:0}.card .card-body,.card .card-footer,.card .card-header{padding:1.5rem 1.5rem 0}.card .card-body:last-child,.card .card-footer:last-child,.card .card-header:last-child{padding-bottom:1.5rem}.card .card-image{padding-top:1.5rem}.card .card-image:first-child{padding-top:0}.card .card-image:first-child img{border-top-left-radius:.3rem;border-top-right-radius:.3rem}.card .card-image:last-child img{border-bottom-left-radius:.3rem;border-bottom-right-radius:.3rem}.card .card-title{font-size:1.4em;line-height:1;margin-bottom:.5rem;margin-top:0}.card .card-meta{color:#b3b3b3;font-size:1em;margin-bottom:0;margin-top:0}.chip{-webkit-align-content:space-around;align-content:space-around;align-items:center;border:.1rem solid transparent;border-radius:.3rem;display:flex;display:-ms-flexbox;display:-webkit-flex;-ms-flex-align:center;-ms-flex-line-pack:distribute;list-style:none;margin:0;padding:.5rem 0}.chip .chip-icon{-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto}.chip .chip-content{-webkit-flex:1 1 auto;-ms-flex:1 1 auto;flex:1 1 auto;overflow:hidden;padding:0 1rem;text-overflow:ellipsis}.chip .chip-action{-webkit-flex:0 0 auto;-ms-flex:0 0 auto;flex:0 0 auto}.chip .chip-title{font-size:1.4rem}.chip .chip-meta{color:#b3b3b3;font-size:1.2rem}.chip-sm{align-items:center;background:#eff1fa;border-radius:.3rem;color:#666;display:-ms-inline-flexbox;display:inline-flex;display:-webkit-inline-flex;-ms-flex-align:center;font-size:1.2rem;height:2.4rem;max-width:100%;padding:.3rem .6rem;vertical-align:middle}.chip-sm:focus,.chip-sm:hover{background:#e8eaf7}.chip-sm .btn-clear{margin-top:-.2rem}.chip-sm .btn-clear::before{color:#3b49af;font-size:1.6rem}.chip-sm.selected{background:#5764c6;color:#fff}.chip-sm.selected .btn-clear::before{color:#eff1fa}.chip-sm .chip-name{margin-left:.4rem;overflow:hidden;text-overflow:ellipsis}.chip-sm .avatar{font-size:.8rem;height:1.6rem;width:1.6rem}.label{background:#efefef;border-radius:.2rem;color:#666;display:inline;font-size:1em;padding:.1em .3em;vertical-align:baseline}.menu,.menu .menu-item,.menu .menu-item a,.modal-container,.tooltip::after{border-radius:.3rem}.label.label-primary{background:#5764c6;border-color:#4f5dc3;color:#fff}.menu{background:#fff;margin:0;padding:.5rem}.menu .menu-header,.menu .menu-item,.menu .menu-item a{display:block;padding:.2rem 1rem}.menu .menu-item{color:#333;line-height:2.4rem;margin-top:.1rem;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}.menu .menu-item a{color:inherit;margin:-.2rem -1rem}.menu .menu-item a:focus,.menu .menu-item a:hover{color:#5764c6}.menu .menu-item a.active,.menu .menu-item a:active{background:#eff1fa;color:#4452c0}.menu .menu-header{color:#ccc;font-size:1.2rem;line-height:1.8rem;margin-top:0}.menu .menu-header .menu-header-text{background:#fff;display:inline-block;margin-left:-.6rem;padding:0 .6rem;position:relative;z-index:99}.menu .menu-header::after{border-bottom:.1rem solid #efefef;content:"";display:block;height:.1rem;-webkit-transform:translateY(-1rem);transform:translateY(-1rem);width:100%}.modal{-webkit-align-items:center;align-items:center;bottom:0;display:none;-ms-flex-align:center;-ms-flex-pack:center;-ms-grid-row-align:center;-webkit-justify-content:center;justify-content:center;left:0;opacity:0;overflow:hidden;position:fixed;right:0;top:0}.modal.active{display:flex;display:-ms-flexbox;display:-webkit-flex;opacity:1;z-index:1988}.modal.active .modal-overlay{background:rgba(0,0,0,.75);bottom:0;display:block;left:0;position:absolute;right:0;top:0}.modal.active .modal-container{-webkit-animation:slide-down .216s;animation:slide-down .216s}.modal-container{-webkit-animation:slide-up .216s;animation:slide-up .216s;background:#fff;display:block;margin:0 auto;padding:0;text-align:left;z-index:1988}.modal-container .modal-header{padding:1.5rem}.modal-container .modal-header .modal-title{font-size:1.5rem;margin:0}.modal-container .modal-body{max-height:50vh;overflow-y:auto;padding:1.5rem;position:relative}.modal-container .modal-footer{padding:1.5rem;text-align:right}@media screen and (min-width:640px){.modal-container{width:64rem}}@media screen and (min-width:320px){.modal-sm .modal-container{width:32rem}}.breadcrumb,.pagination,.tab{list-style:none;margin:.5rem 0}.breadcrumb{padding:1.2rem}.breadcrumb .breadcrumb-item{display:inline-block;margin:0}.breadcrumb .breadcrumb-item:last-child,.breadcrumb .breadcrumb-item:last-child a{color:#666;pointer-events:none}.breadcrumb .breadcrumb-item:not(:last-child)::after{color:#c5c5c5;content:"/";padding:0 .4rem}.tab{border-bottom:.1rem solid #c5c5c5;display:flex;display:-ms-flexbox;display:-webkit-flex}.tab .tab-item{margin-bottom:-.1rem}.tab .tab-item a{border-bottom:.2rem solid transparent;color:#333;display:block;padding:.5rem 1.5rem}.pagination,.pagination .page-item,.pagination .page-item a{display:inline-block}.tab .tab-item a:focus,.tab .tab-item a:hover{border-bottom-color:#5764c6;color:#5764c6}.tab .tab-item.active a{border-bottom-color:#3b49af;color:#3b49af}.tab.tab-block .tab-item{-webkit-flex:1 0 auto;-ms-flex:1 0 auto;flex:1 0 auto;text-align:center}.tab.tab-block .tab-item .badge[data-badge]::after{position:absolute;right:1.5rem;top:.5rem;-webkit-transform:translate(50%,-.8rem);transform:translate(50%,-.8rem)}.pagination{padding:1.2rem}.pagination .page-item span{display:inline-block;padding:.6rem .5rem}.pagination .page-item a{border-radius:.3rem;margin:0 .1rem;padding:.6rem 1.2rem;text-decoration:none}.pagination .page-item a:focus,.pagination .page-item a:hover{background:#eff1fa}.pagination .page-item.active a{background:#5764c6;color:#fff}.toast{background:#efefef;border:.1rem solid #eaeaea;border-radius:.3rem;color:#666;display:block;padding:1.4rem;width:100%}.toast.toast-primary{background:#5764c6;border-color:#4f5dc3;color:#fff}.toast.toast-success{background:#32b643;border-color:#30ae40;color:#fff}.toast.toast-danger{background:#e85600;border-color:#de5200;color:#fff}.toast.toast-danger .btn-clear,.toast.toast-primary .btn-clear,.toast.toast-success .btn-clear{color:#fff}.tooltip{position:relative}.tooltip::after{background:rgba(51,51,51,.9);bottom:100%;color:#fff;content:attr(data-tooltip);display:block;font-size:1.2rem;left:50%;line-height:1.6rem;max-width:32rem;opacity:0;overflow:hidden;padding:.6rem 1rem;pointer-events:none;position:absolute;text-overflow:ellipsis;-webkit-transform:translate(-50%,0);transform:translate(-50%,0);transition:all .216s ease;z-index:99}.tooltip:focus::after,.tooltip:hover::after{opacity:1;-webkit-transform:translate(-50%,-.5rem);transform:translate(-50%,-.5rem)}.tooltip.tooltip-right::after{bottom:50%;left:100%;-webkit-transform:translate(0,50%);transform:translate(0,50%)}.tooltip.tooltip-right:focus::after,.tooltip.tooltip-right:hover::after{-webkit-transform:translate(.5rem,50%);transform:translate(.5rem,50%)}.tooltip.tooltip-bottom::after{bottom:auto;top:100%;-webkit-transform:translate(-50%,0);transform:translate(-50%,0)}.tooltip.tooltip-bottom:focus::after,.tooltip.tooltip-bottom:hover::after{-webkit-transform:translate(-50%,.5rem);transform:translate(-50%,.5rem)}.tooltip.tooltip-left::after{bottom:50%;left:auto;right:100%;-webkit-transform:translate(0,50%);transform:translate(0,50%)}.tooltip.tooltip-left:focus::after,.tooltip.tooltip-left:hover::after{-webkit-transform:translate(-.5rem,50%);transform:translate(-.5rem,50%)}.clearfix::after,.container::after{clear:both;content:"";display:table}.block,.centered{display:block}.float-left{float:left!important}.float-right{float:right!important}.rel{position:relative}.abs{position:absolute}.fixed{position:fixed}.centered{float:none;margin-left:auto;margin-right:auto}.mt-10{margin-top:1rem}.mr-10{margin-right:1rem}.mb-10{margin-bottom:1rem}.ml-10{margin-left:1rem}.mt-5{margin-top:.5rem}.mr-5{margin-right:.5rem}.mb-5{margin-bottom:.5rem}.ml-5{margin-left:.5rem}.pt-10{padding-top:1rem}.pr-10{padding-right:1rem}.pb-10{padding-bottom:1rem}.pl-10{padding-left:1rem}.pt-5{padding-top:.5rem}.pr-5{padding-right:.5rem}.pb-5{padding-bottom:.5rem}.pl-5{padding-left:.5rem}.inline{display:inline}.inline-block{display:inline-block}.flex{display:flex;display:-ms-flexbox;display:-webkit-flex}.inline-flex{display:inline-flex;display:-ms-inline-flexbox;display:-webkit-inline-flex}.hide{display:none!important}.visible{visibility:visible}.invisible{visibility:hidden}.text-hide{background:0 0;border:0;color:transparent;font:0/0 a;text-shadow:none}.text-right{text-align:right}.text-center{text-align:center}.text-justify{text-align:justify}.text-lowercase{text-transform:lowercase}.text-uppercase{text-transform:uppercase}.text-capitalize{text-transform:capitalize}.text-normal{font-weight:400}.text-bold{font-weight:700}.text-italic{font-style:italic}.text-ellipsis{overflow:hidden;text-overflow:ellipsis}.text-clip{overflow:hidden;text-overflow:clip}.text-break{-webkit-hyphens:auto;-ms-hyphens:auto;hyphens:auto;word-break:break-word;word-wrap:break-word}.light-shadow{box-shadow:0 .1rem .2rem rgba(0,0,0,.15)}.rounded{border-radius:.3rem}.circle{border-radius:50%}.divider{border-bottom:.1rem solid #efefef;display:block;margin:.5rem}.loading{color:transparent!important;min-height:1.6rem;pointer-events:none;position:relative}.loading::after{-webkit-animation:loading .5s infinite linear;animation:loading .5s infinite linear;border:.2rem solid #5764c6;border-radius:.8rem;border-right-color:transparent;border-top-color:transparent;content:"";display:block;height:1.6rem;left:50%;margin-left:-.8rem;margin-top:-.8rem;position:absolute;top:50%;width:1.6rem}
\ No newline at end of file
diff --git a/index.html b/index.html
index 0ddb033..3e5f0f0 100644
--- a/index.html
+++ b/index.html
@@ -6,13 +6,12 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="author" content="https://github.com/picturepan2/spectre" />
-    <title>Spectre.css: a lightweight, responsive and modern CSS framework</title>
+    <title>Spectre.css - a lightweight, responsive and modern CSS framework</title>
     <link rel="stylesheet" href="dist/spectre.css" />
     <link rel="stylesheet" href="demo/font/style.css" />
     <style>
         header > h4,
         header > h5 {
-            padding-top: 4rem;
             margin-top: 4rem;
             margin-bottom: 2rem;
         }
@@ -43,6 +42,9 @@
             margin: 4rem 0;
             color: #666;
         }
+        .empty .icon {
+            font-size: 4rem;
+        }
         .code {
             color: #666;
         }
@@ -61,8 +63,8 @@
     </style>
 </head>
 <body>
-    <section class="container bg-grey">
-        <section id="overview" class="grid-hero grid-960">
+    <section class="section bg-grey">
+        <section id="overview" class="grid-hero container grid-960">
             <header class="text-center"><h3>Spectre.css</h3></header>
             <section>
                 <p><strong>Spectre.css</strong> is a lightweight, responsive and modern CSS framework for faster and extensible development.</p>
@@ -83,8 +85,8 @@
             </section>
         </section>
     </section>
-    <section class="container">
-        <section id="getting-started" class="grid-960">
+    <section class="section">
+        <section id="getting-started" class="container grid-960">
             <header class="text-center"><h4>getting started</h4></header>
             <section class="notes">
                 <p>There are 3 ways to get started with Spectre CSS framework in your projects. You can either manually install or use NPM and Bower.</p>
@@ -110,7 +112,7 @@
             </section>
         </section>
 
-        <section id="compiling" class="grid-960">
+        <section id="compiling" class="container grid-960">
             <header class="text-center"><h4>compiling custom version</h4></header>
             <section class="notes">
                 <p>Spectre uses <a href="http://gulpjs.com/" target="_blank">Gulp</a> for compiling CSS. You can customize your version of Spectre.css by editing LESS files in <code>/src</code> directory or removing unneeded components from <code>spectre.less</code>.</p>
@@ -125,7 +127,7 @@
             </section>
         </section>
 
-        <section id="elements" class="grid-960">
+        <section id="elements" class="container grid-960">
             <section class="notes text-center">
                 <ul class="tab inline-flex">
                     <li class="tab-item active">
@@ -134,6 +136,11 @@
                         </a>
                     </li>
                     <li class="tab-item">
+                        <a href="#layout">
+                            layout
+                        </a>
+                    </li>
+                    <li class="tab-item">
                         <a href="#components">
                             components
                         </a>
@@ -148,7 +155,6 @@
             <section class="notes text-center">
                 <div class="btn-group">
                     <a href="#typography" class="btn btn-primary">typography</a>
-                    <a href="#layout" class="btn btn-primary">layout</a>
                     <a href="#tables" class="btn btn-primary">tables</a>
                     <a href="#buttons" class="btn btn-primary">buttons</a>
                     <a href="#forms" class="btn btn-primary">forms</a>
@@ -157,7 +163,7 @@
             </section>
         </section>
 
-        <section id="typography" class="grid-960">
+        <section id="typography" class="container grid-960">
             <header class="text-center"><h4>typography</h4></header>
             <section class="notes">
                 <p><strong>Typography</strong> sets default styles for headings, paragraphs, blockquote, lists and code elements. </p>
@@ -273,158 +279,7 @@
 
         </section>
 
-        <section id="layout" class="grid-960">
-            <header class="text-center"><h4>flexbox layout</h4></header>
-            <section class="notes">
-                <p><strong>Layout</strong> includes flexbox based responsive grid system with 12 columns. </p>
-            </section>
-            <div class="columns">
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-                <div class="column">
-                    <div class="bg-grey"></div>
-                </div>
-            </div>
-
-            <div class="columns">
-                <div class="column col-12">
-                    <div class="bg-grey">col-12 (100%)</div>
-                </div>
-            </div>
-            <div class="columns">
-                <div class="column col-9">
-                    <div class="bg-grey">col-9 (75%)</div>
-                </div>
-            </div>
-            <div class="columns">
-                <div class="column col-6">
-                    <div class="bg-grey">col-6 (50%)</div>
-                </div>
-            </div>
-            <div class="columns">
-                <div class="column col-3">
-                    <div class="bg-grey">col-3 (25%)</div>
-                </div>
-            </div>
-
-            <section class="notes">
-                <p>Add the class <code>columns</code> to a container with the class <code>container</code>. And add any element you want with classname <code>column</code> inside the container. These columns will take up the space equally. You can specific the width of each column by adding class <code>col-[1-12]</code>.</p>
-            </section>
-
-            <!-- layout example -->
-<pre class="code lang-html">
-&lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;container&quot;</span>&gt;
-    &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;columns&quot;</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-6&quot;</span>&gt;col-6&lt;<span class="tag">/div</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-3&quot;</span>&gt;col-3&lt;<span class="tag">/div</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-2&quot;</span>&gt;col-2&lt;<span class="tag">/div</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-1&quot;</span>&gt;col-1&lt;<span class="tag">/div</span>&gt;
-    &lt;<span class="tag">/div</span>&gt;
-&lt;<span class="tag">/div</span>&gt;
-</pre>
-
-            <div class="columns">
-                <div class="column col-md-6">
-                    <div class="bg-grey">col-md-6</div>
-                </div>
-                <div class="column col-md-3">
-                    <div class="bg-grey">col-md-3</div>
-                </div>
-                <div class="column col-md-3">
-                    <div class="bg-grey">col-md-3</div>
-                </div>
-            </div>
-
-            <div class="columns">
-                <div class="column col-sm-6">
-                    <div class="bg-grey">col-sm-6</div>
-                </div>
-                <div class="column col-sm-3">
-                    <div class="bg-grey">col-sm-3</div>
-                </div>
-                <div class="column col-sm-3">
-                    <div class="bg-grey">col-sm-3</div>
-                </div>
-            </div>
-
-            <div class="columns">
-                <div class="column col-xs-6">
-                    <div class="bg-grey">col-xs-6</div>
-                </div>
-                <div class="column col-xs-3">
-                    <div class="bg-grey">col-xs-3</div>
-                </div>
-                <div class="column col-xs-3">
-                    <div class="bg-grey">col-xs-3</div>
-                </div>
-            </div>
-
-            <section class="notes">
-                <p>Spectre also provides a neat responsive layout grid system. There are <code>.col-xs-[1-12]</code>, <code>.col-sm-[1-12]</code> and <code>.col-md-[1-12]</code> available for flexible grid across mobile, tablet and desktop viewport usage.</p>
-                <ul>
-                    <li>For window width less than <strong>480px</strong>, all columns will show as a single row.</li>
-                    <li><code>col-xs-[1-12]</code> apply to window width greater than or equal to <strong>481px</strong>. </li>
-                    <li><code>col-sm-[1-12]</code> apply to window width greater than or equal to <strong>601px</strong>. </li>
-                    <li><code>col-md-[1-12]</code> apply to window width greater than or equal to <strong>841px</strong>. </li>
-                </ul>
-            </section>
-
-            <!-- layout example -->
-<pre class="code lang-html">
-&lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;container&quot;</span>&gt;
-    &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;columns&quot;</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-6&quot;</span>&gt;col-xs-6&lt;<span class="tag">/div</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-3&quot;</span>&gt;col-xs-3&lt;<span class="tag">/div</span>&gt;
-        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-3&quot;</span>&gt;col-xs-3&lt;<span class="tag">/div</span>&gt;
-    &lt;<span class="tag">/div</span>&gt;
-&lt;<span class="tag">/div</span>&gt;
-</pre>
-
-            <section class="notes">
-                <p>For hiding elements on specific viewport sizes, there are classes <code>.hide-xs</code>, <code>.hide-sm</code>, <code>.hide-md</code>, <code>.hide-lg</code> and <code>.hide-xl</code> available.</p>
-                <ul>
-                    <li><code>hide-xs</code> hides elements when the viewport is smaller than or equal to <strong>480px</strong>. </li>
-                    <li><code>hide-sm</code> hides elements when the viewport is smaller than or equal to <strong>600px</strong>. </li>
-                    <li><code>hide-md</code> hides elements when the viewport is smaller than or equal to <strong>840px</strong>. </li>
-                    <li><code>hide-lg</code> hides elements when the viewport is smaller than or equal to <strong>960px</strong>. </li>
-                    <li><code>hide-xl</code> hides elements when the viewport is smaller than or equal to <strong>1280px</strong>. </li>
-                </ul>
-            </section>
-
-        </section>
-
-        <section id="tables" class="grid-960">
+        <section id="tables" class="container grid-960">
             <header class="text-center"><h4>tables</h4></header>
             <section class="notes">
                 <p><strong>Tables</strong> include default styles for tables and data sets.</p>
@@ -440,7 +295,7 @@
                     </tr>
                 </thead>
                 <tbody>
-                    <tr class="selected">
+                    <tr>
                         <td>The Shawshank Redemption</td>
                         <td>2h 22min</td>
                         <td>Crime, Drama</td>
@@ -495,7 +350,7 @@
 
         </section>
 
-        <section id="buttons" class="grid-960">
+        <section id="buttons" class="container grid-960">
             <header class="text-center"><h4>buttons</h4></header>
             <section class="notes">
                 <p><strong>Buttons</strong> include simple button styles for actions in different types and sizes. </p>
@@ -588,6 +443,15 @@
                     </div>
                 </div>
             </div>
+            <div class="columns">
+                <div class="column">
+                    <div class="btn-group">
+                        <button class="btn btn-sm">first button</button>
+                        <button class="btn btn-sm">second button</button>
+                        <button class="btn btn-sm">third button</button>
+                    </div>
+                </div>
+            </div>
             <section class="notes">
                 <p>If you want to use buttons as a group, add the class <code>btn-group</code> to the container. You can add the class <code>btn-group-block</code> for a full-width button group.</p>
             </section>
@@ -603,7 +467,7 @@
 
         </section>
 
-        <section id="forms" class="grid-960">
+        <section id="forms" class="container grid-960">
             <header class="text-center"><h4>forms</h4></header>
             <section class="notes">
                 <p><strong>Forms</strong> provide the most common control styles used in forms, including label, input, textarea, select, checkbox, radio and switch.  </p>
@@ -876,7 +740,7 @@
 
         </section>
 
-        <section id="media" class="grid-960">
+        <section id="media" class="container grid-960">
             <header class="text-center"><h4>media</h4></header>
             <section class="notes">
                 <p><strong>Media</strong> include responsive image and video class. </p>
@@ -911,7 +775,298 @@
 
         </section>
 
-        <section id="components" class="grid-960">
+        <section id="layout" class="container grid-960">
+            <section class="notes text-center">
+                <ul class="tab inline-flex">
+                    <li class="tab-item">
+                        <a href="#elements">
+                            elements
+                        </a>
+                    </li>
+                    <li class="tab-item active">
+                        <a href="#layout">
+                            layout
+                        </a>
+                    </li>
+                    <li class="tab-item">
+                        <a href="#components">
+                            components
+                        </a>
+                    </li>
+                    <li class="tab-item">
+                        <a href="#utilities">
+                            utilities
+                        </a>
+                    </li>
+                </ul>
+            </section>
+            <section class="notes text-center">
+                <div class="btn-group">
+                    <a href="#grid" class="btn btn-primary">flexbox grid</a>
+                    <a href="#responsive" class="btn btn-primary">responsive</a>
+                    <a href="#navbar" class="btn btn-primary">navbar</a>
+                    <a href="#empty" class="btn btn-primary">empty states</a>
+                </div>
+            </section>
+        </section>
+
+        <section id="grid" class="container grid-960">
+            <header class="text-center"><h4>flexbox grid</h4></header>
+            <section class="notes">
+                <p><strong>Layout</strong> includes flexbox based responsive grid system with 12 columns. </p>
+            </section>
+            <div class="columns">
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+                <div class="column">
+                    <div class="bg-grey"></div>
+                </div>
+            </div>
+
+            <div class="columns">
+                <div class="column col-12">
+                    <div class="bg-grey">col-12 (100%)</div>
+                </div>
+            </div>
+            <div class="columns">
+                <div class="column col-9">
+                    <div class="bg-grey">col-9 (75%)</div>
+                </div>
+            </div>
+            <div class="columns">
+                <div class="column col-6">
+                    <div class="bg-grey">col-6 (50%)</div>
+                </div>
+            </div>
+            <div class="columns">
+                <div class="column col-3">
+                    <div class="bg-grey">col-3 (25%)</div>
+                </div>
+            </div>
+
+            <section class="notes">
+                <p>Add the class <code>columns</code> to a container with the class <code>container</code>. And add any element you want with classname <code>column</code> inside the container. These columns will take up the space equally. You can specific the width of each column by adding class <code>col-[1-12]</code>.</p>
+            </section>
+
+            <!-- layout example -->
+<pre class="code lang-html">
+&lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;container&quot;</span>&gt;
+    &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;columns&quot;</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-6&quot;</span>&gt;col-6&lt;<span class="tag">/div</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-3&quot;</span>&gt;col-3&lt;<span class="tag">/div</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-2&quot;</span>&gt;col-2&lt;<span class="tag">/div</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-1&quot;</span>&gt;col-1&lt;<span class="tag">/div</span>&gt;
+    &lt;<span class="tag">/div</span>&gt;
+&lt;<span class="tag">/div</span>&gt;
+</pre>
+
+        </section>
+
+        <section id="responsive" class="container grid-960">
+            <header class="text-center"><h4>responsive grid</h4></header>
+            <div class="columns">
+                <div class="column col-md-6">
+                    <div class="bg-grey">col-md-6</div>
+                </div>
+                <div class="column col-md-3">
+                    <div class="bg-grey">col-md-3</div>
+                </div>
+                <div class="column col-md-3">
+                    <div class="bg-grey">col-md-3</div>
+                </div>
+            </div>
+
+            <div class="columns">
+                <div class="column col-sm-6">
+                    <div class="bg-grey">col-sm-6</div>
+                </div>
+                <div class="column col-sm-3">
+                    <div class="bg-grey">col-sm-3</div>
+                </div>
+                <div class="column col-sm-3">
+                    <div class="bg-grey">col-sm-3</div>
+                </div>
+            </div>
+
+            <div class="columns">
+                <div class="column col-xs-6">
+                    <div class="bg-grey">col-xs-6</div>
+                </div>
+                <div class="column col-xs-3">
+                    <div class="bg-grey">col-xs-3</div>
+                </div>
+                <div class="column col-xs-3">
+                    <div class="bg-grey">col-xs-3</div>
+                </div>
+            </div>
+
+            <section class="notes">
+                <p>Spectre also provides a neat responsive layout grid system. There are <code>.col-xs-[1-12]</code>, <code>.col-sm-[1-12]</code> and <code>.col-md-[1-12]</code> available for flexible grid across mobile, tablet and desktop viewport usage.</p>
+                <ul>
+                    <li>For window width less than <strong>480px</strong>, all columns will show as a single row.</li>
+                    <li><code>col-xs-[1-12]</code> apply to window width greater than or equal to <strong>481px</strong>. </li>
+                    <li><code>col-sm-[1-12]</code> apply to window width greater than or equal to <strong>601px</strong>. </li>
+                    <li><code>col-md-[1-12]</code> apply to window width greater than or equal to <strong>841px</strong>. </li>
+                </ul>
+            </section>
+
+            <!-- layout example -->
+<pre class="code lang-html">
+&lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;container&quot;</span>&gt;
+    &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;columns&quot;</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-6&quot;</span>&gt;col-xs-6&lt;<span class="tag">/div</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-3&quot;</span>&gt;col-xs-3&lt;<span class="tag">/div</span>&gt;
+        &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;column col-xs-3&quot;</span>&gt;col-xs-3&lt;<span class="tag">/div</span>&gt;
+    &lt;<span class="tag">/div</span>&gt;
+&lt;<span class="tag">/div</span>&gt;
+</pre>
+
+            <section class="notes">
+                <p>For hiding elements on specific viewport sizes, there are classes <code>.hide-xs</code>, <code>.hide-sm</code>, <code>.hide-md</code>, <code>.hide-lg</code> and <code>.hide-xl</code> available.</p>
+                <ul>
+                    <li><code>hide-xs</code> hides elements when the viewport is smaller than or equal to <strong>480px</strong>. </li>
+                    <li><code>hide-sm</code> hides elements when the viewport is smaller than or equal to <strong>600px</strong>. </li>
+                    <li><code>hide-md</code> hides elements when the viewport is smaller than or equal to <strong>840px</strong>. </li>
+                    <li><code>hide-lg</code> hides elements when the viewport is smaller than or equal to <strong>960px</strong>. </li>
+                    <li><code>hide-xl</code> hides elements when the viewport is smaller than or equal to <strong>1280px</strong>. </li>
+                </ul>
+            </section>
+        </section>
+
+        <section id="navbar" class="container grid-960">
+            <header class="text-center"><h4>navbar</h4></header>
+            <section class="notes">
+                <p><strong>Navbar</strong> is a layout container that appear in the header of apps and websites. </p>
+            </section>
+            <div class="columns">
+                <div class="column">
+                    <header class="navbar bg-grey">
+                        <section class="navbar-section">
+                            <a href="#navbar" class="btn btn-link btn-lg"><i class="icon icon-menu"></i></a>
+                            <a href="#navbar" class="navbar-brand">Spectre.css</a>
+                        </section>
+                        <section class="navbar-section">
+                            <input class="form-input form-inline" type="text" placeholder="search" />
+                            <a href="#navbar" class="btn btn-link">documents</a>
+                            <a href="#navbar" class="btn btn-link">login</a>
+                            <a href="#navbar" class="btn btn-primary">signup</a>
+                        </section>
+                    </header>
+                </div>
+            </div>
+            <div class="columns">
+                <div class="column">
+                    <header class="navbar">
+                        <section class="navbar-section">
+                            <a href="#navbar" class="btn btn-link btn-lg"><i class="icon icon-menu"></i></a>
+                            <a href="#navbar" class="navbar-brand">Spectre.css</a>
+                        </section>
+                        <section class="navbar-section">
+                            <input class="form-input form-inline" type="text" placeholder="search" />
+                            <figure class="avatar ml-10 mr-10">
+                                <img src="demo/img/avatar-4.png" />
+                            </figure>
+                            <a href="#navbar" class="btn btn-primary">share</a>
+                        </section>
+                    </header>
+                </div>
+            </div>
+
+            <section class="notes">
+                <p>A navbar component can include logo brand, nav links and buttons, search box or any combination of those elements. By default, there is no grey background.</p>
+            </section>
+
+            <!-- navbar example -->
+<pre class="code lang-html">
+&lt;<span class="tag">header</span> <span class="atn">class</span>=<span class="atv">&quot;navbar&quot;</span>&gt;
+    &lt;<span class="tag">section</span> <span class="atn">class</span>=<span class="atv">&quot;navbar-section&quot;</span>&gt;
+        &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;btn btn-link btn-lg&quot;</span>&gt;
+            &lt;<span class="tag">i</span> <span class="atn">class</span>=<span class="atv">&quot;icon icon-people&quot;</span>&gt;&lt;<span class="tag">/i</span>&gt;
+        &lt;<span class="tag">/a</span>&gt;
+        &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;navbar-brand&quot;</span>&gt;Spectre.css&lt;<span class="tag">/a</span>&gt;
+    &lt;<span class="tag">/section</span>&gt;
+    &lt;<span class="tag">section</span> <span class="atn">class</span>=<span class="atv">&quot;navbar-section&quot;</span>&gt;
+        &lt;<span class="tag">input</span> <span class="atn">type</span>=<span class="atv">&quot;text&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;form-input form-inline&quot;</span> <span class="atn">placeholder</span>=<span class="atv">&quot;search&quot;</span>&gt;documents&lt;<span class="tag">/a</span>&gt;
+        &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;btn btn-link&quot;</span>&gt;documents&lt;<span class="tag">/a</span>&gt;
+        &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;btn btn-link&quot;</span>&gt;login&lt;<span class="tag">/a</span>&gt;
+        &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;btn btn-primary&quot;</span>&gt;signup&lt;<span class="tag">/a</span>&gt;
+    &lt;<span class="tag">/section</span>&gt;
+&lt;<span class="tag">/header</span>&gt;
+</pre>
+
+        </section>
+
+        <section id="empty" class="container grid-960">
+            <header class="text-center"><h4>empty states/blank slates</h4></header>
+            <section class="notes">
+                <p><strong>Empty states/blank slates</strong> are commonly used as placeholders for first time use, empty data and error screens.</p>
+            </section>
+            <div class="columns">
+                <div class="column col-6">
+                    <section class="empty">
+                        <i class="icon icon-markunread"></i>
+                        <p class="empty-title">You have no new messages</p>
+                        <p class="empty-meta">Click the button to start a conversation.</p>
+                        <button class="btn btn-primary">Send a message</button>
+                    </section>
+                </div>
+                <div class="column col-6">
+                    <section class="empty">
+                        <i class="icon icon-people"></i>
+                        <p class="empty-title">You are not following anyone</p>
+                        <button class="btn btn-primary">Discover people</button>
+                    </section>
+                </div>
+            </div>
+
+            <section class="notes">
+                <p>An empty state component can include icons, messages(title and meta messages) and action buttons or any combination of those elements. </p>
+            </section>
+
+            <!-- empty states example -->
+<pre class="code lang-html">
+&lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;empty&quot;</span>&gt;
+    &lt;<span class="tag">i</span> <span class="atn">class</span>=<span class="atv">&quot;icon icon-people&quot;</span>&gt;&lt;<span class="tag">/i</span>&gt;
+    &lt;<span class="tag">p</span> <span class="atn">class</span>=<span class="atv">&quot;empty-title&quot;</span>&gt;You have no new messages&lt;<span class="tag">/p</span>&gt;
+    &lt;<span class="tag">p</span> <span class="atn">class</span>=<span class="atv">&quot;empty-meta&quot;</span>&gt;Click the button to start a conversation.&lt;<span class="tag">/p</span>&gt;
+    &lt;<span class="tag">button</span> <span class="atn">class</span>=<span class="atv">&quot;btn btn-primary&quot;</span>&gt;Send a message&lt;<span class="tag">/button</span>&gt;
+&lt;<span class="tag">/div</span>&gt;
+</pre>
+
+        </section>
+
+        <section id="components" class="container grid-960">
             <section class="notes text-center">
                 <ul class="tab inline-flex">
                     <li class="tab-item">
@@ -919,6 +1074,11 @@
                             elements
                         </a>
                     </li>
+                    <li class="tab-item">
+                        <a href="#layout">
+                            layout
+                        </a>
+                    </li>
                     <li class="tab-item active">
                         <a href="#components">
                             components
@@ -948,7 +1108,7 @@
             </section>
         </section>
 
-        <section id="avatars" class="grid-960">
+        <section id="avatars" class="container grid-960">
             <header class="text-center"><h4>avatars</h4></header>
             <section class="notes">
                 <p><strong>Avatars</strong> are user profile pictures. </p>
@@ -1024,7 +1184,7 @@
 
         </section>
 
-        <section id="chips" class="grid-960">
+        <section id="chips" class="container grid-960">
             <header class="text-center"><h4>chips</h4></header>
             <section class="notes">
                 <p><strong>Chips</strong> are complex entities in small blocks. </p>
@@ -1094,7 +1254,7 @@
 
         </section>
 
-        <section id="autocomplete" class="grid-960">
+        <section id="autocomplete" class="container grid-960">
             <header class="text-center"><h4>autocomplete</h4></header>
             <section class="notes">
                 <p><strong>Autocomplete</strong> form component provides suggestions while you type. It is often used for tags and contacts input. </p>
@@ -1255,7 +1415,7 @@
 
         </section>
 
-        <section id="tooltips" class="grid-960">
+        <section id="tooltips" class="container grid-960">
             <header class="text-center"><h4>tooltips</h4></header>
             <section class="notes">
                 <p><strong>Tooltips</strong> provide context information labels that appear on hover and focus.</p>
@@ -1287,7 +1447,7 @@
 
         </section>
 
-        <section id="labels" class="grid-960">
+        <section id="labels" class="container grid-960">
             <header class="text-center"><h4>labels</h4></header>
             <section class="notes">
                 <p><strong>Labels</strong> are formatted text tags for highlighted, informative information.</p>
@@ -1310,7 +1470,7 @@
 
         </section>
 
-        <section id="badges" class="grid-960">
+        <section id="badges" class="container grid-960">
             <header class="text-center"><h4>badges</h4></header>
             <section class="notes">
                 <p><strong>Badges</strong> are often used as unread number indicators.</p>
@@ -1350,7 +1510,7 @@
 
         </section>
 
-        <section id="toasts" class="grid-960">
+        <section id="toasts" class="container grid-960">
             <header class="text-center"><h4>toasts</h4></header>
             <section class="notes">
                 <p><strong>Toasts</strong> are used to show alert or information to users.</p>
@@ -1404,7 +1564,7 @@
 
         </section>
 
-        <section id="menus" class="grid-960">
+        <section id="menus" class="container grid-960">
             <header class="text-center"><h4>menus</h4></header>
             <section class="notes">
                 <p>A <strong>menu</strong> is a vertical list of links or buttons for actions and navigation.</p>
@@ -1529,7 +1689,7 @@
 
         </section>
 
-        <section id="navigation" class="grid-960">
+        <section id="navigation" class="container grid-960">
             <header class="text-center"><h4>navigation</h4></header>
             <section class="notes">
                 <p><strong>Navigation</strong> includes several components, including breadcrumbs and tabs.</p>
@@ -1856,7 +2016,7 @@
 
         </section>
 
-        <section id="modals" class="grid-960">
+        <section id="modals" class="container grid-960">
             <header class="text-center"><h4>modals</h4></header>
             <section class="notes">
                 <p><strong>Modals</strong> are flexible dialog prompts.</p>
@@ -1996,7 +2156,7 @@
 
         </section>
 
-        <section id="cards" class="grid-960">
+        <section id="cards" class="container grid-960">
             <header class="text-center"><h4>cards</h4></header>
             <section class="notes">
                 <p><strong>Cards</strong> are flexible content containers.</p>
@@ -2080,7 +2240,7 @@
 
         </section>
 
-        <section id="utilities" class="grid-960">
+        <section id="utilities" class="container grid-960">
             <section class="notes text-center">
                 <ul class="tab inline-flex">
                     <li class="tab-item">
@@ -2089,6 +2249,11 @@
                         </a>
                     </li>
                     <li class="tab-item">
+                        <a href="#layout">
+                            layout
+                        </a>
+                    </li>
+                    <li class="tab-item">
                         <a href="#components">
                             components
                         </a>
@@ -2111,7 +2276,7 @@
             </section>
         </section>
 
-        <section id="position" class="grid-960">
+        <section id="position" class="container grid-960">
             <section class="notes">
                 <p><strong>Position utilities</strong> are used for useful layout and position things, including clearfix, float, position and margin/padding utilities.</p>
             </section>
@@ -2139,7 +2304,7 @@
 
         </section>
 
-        <section id="display" class="grid-960">
+        <section id="display" class="container grid-960">
             <section class="notes">
                 <p><strong>Display utilities</strong> are used for display and hidden things.</p>
             </section>
@@ -2168,7 +2333,7 @@
 
         </section>
 
-        <section id="text" class="grid-960">
+        <section id="text" class="container grid-960">
             <section class="notes">
                 <p><strong>Text utilities</strong> are used for text alignment, styles and overflow things.</p>
             </section>
@@ -2208,7 +2373,7 @@
 
         </section>
 
-        <section id="shapes" class="grid-960">
+        <section id="shapes" class="container grid-960">
             <section class="notes">
                 <p><strong>Shape utilities</strong> are used for change element shapes.</p>
             </section>
@@ -2223,7 +2388,7 @@
 
         </section>
 
-        <section id="divider" class="grid-960">
+        <section id="divider" class="container grid-960">
             <section class="notes">
                 <p>A <strong>Divider</strong> is used for separating elements.</p>
             </section>
@@ -2241,7 +2406,7 @@
 
         </section>
 
-        <section id="loading" class="grid-960">
+        <section id="loading" class="container grid-960">
             <section class="notes">
                 <p><strong>Loading indicator</strong> is used for loading or updating. Also, you can add the class <code>loading</code> to buttons for loading status.</p>
             </section>
@@ -2259,9 +2424,9 @@
         </section>
     </section>
     <footer class="bg-grey">
-        <section id="copyright" class="grid-footer grid-960">
+        <section id="copyright" class="grid-footer container grid-960">
             <p>
-                <a href="https://github.com/picturepan2/spectre" target="_blank">GitHub Repo</a> | <a href="#">Back to top</a> | version: 0.1.18
+                <a href="https://github.com/picturepan2/spectre" target="_blank">GitHub Repo</a> | <a href="#">Back to top</a> | version: 0.1.19
             </p>
             <p>Designed and built with love by <a href="https://twitter.com/picturepan2" target="_blank">Yan Zhu</a>. Licensed under the <a href="https://github.com/picturepan2/spectre/blob/master/LICENSE" target="_blank">MIT License</a>.</p>
         </section>
diff --git a/package.json b/package.json
index 2ccbd29..cf1f8ef 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "spectre.css",
-  "version": "0.1.18",
+  "version": "0.1.19",
   "homepage": "http://picturepan2.github.io/spectre",
   "author": "Yan Zhu <picturepan2@hotmail.com>",
   "description": "Spectre.css: a lightweight, responsive and modern CSS framework.",
diff --git a/spectre.less b/spectre.less
index 6c04f74..d7c704d 100644
--- a/spectre.less
+++ b/spectre.less
@@ -10,12 +10,16 @@
 
 // Core classes
 @import 'src/typography.less';
-@import 'src/layout.less';
 @import 'src/media.less';
 @import 'src/tables.less';
 @import 'src/buttons.less';
 @import 'src/forms.less';
 
+// Layout
+@import 'src/layout.less';
+@import 'src/navbar.less';
+@import 'src/empty.less';
+
 // Components
 @import 'src/avatars.less';
 @import 'src/animations.less';
diff --git a/src/avatars.less b/src/avatars.less
index e0f18c8..e744e1f 100644
--- a/src/avatars.less
+++ b/src/avatars.less
@@ -49,7 +49,7 @@
   }
 
   &[data-initial]::after {
-    color: @core-text-color;
+    color: @core-light-color;
     content: attr(data-initial);
     left: 50%;
     position: absolute;
diff --git a/src/badges.less b/src/badges.less
index 0e727eb..f1e2512 100644
--- a/src/badges.less
+++ b/src/badges.less
@@ -7,7 +7,7 @@
     background-clip: padding-box;
     border: .1rem solid #fff;
     border-radius: 1rem;
-    color: @core-text-color;
+    color: @core-light-color;
     content: attr(data-badge);
     display: inline-block;
     font-size: 1.1rem;
diff --git a/src/base.less b/src/base.less
index 256930f..78da9f9 100644
--- a/src/base.less
+++ b/src/base.less
@@ -6,8 +6,8 @@
 }
 html {
   box-sizing: border-box;
-  font-size: 10px;
-  line-height: 1.428571429;
+  font-size: @html-font-size;
+  line-height: @html-line-height;
   -webkit-tap-highlight-color: transparent;
 }
 body {
diff --git a/src/buttons.less b/src/buttons.less
index 2070bfd..cb97f5c 100644
--- a/src/buttons.less
+++ b/src/buttons.less
@@ -22,37 +22,37 @@
   &:focus {
     background: @core-color;
     border-color: darken(@core-color, 5%);
-    color: @core-text-color;
+    color: @core-light-color;
   }
   &:active,
   &.active {
     background: darken(@core-color, 5%);
     border-color: darken(@core-color, 10%);
-    color: @core-text-color;
+    color: @core-light-color;
   }
 
   // Button Primary
   &.btn-primary {
     background: @core-color;
     border-color: darken(@core-color, 5%);
-    color: @core-text-color;
+    color: @core-light-color;
 
     &:hover,
     &:focus {
       background: darken(@core-color, 5%);
       border-color: darken(@core-color, 10%);
-      color: @core-text-color;
+      color: @core-light-color;
     }
     &:active,
     &.active {
       background: darken(@core-color, 10%);
       border-color: darken(@core-color, 15%);
-      color: @core-text-color;
+      color: @core-light-color;
     }
 
     &.loading {
       &::after {
-        border-color: @core-text-color;
+        border-color: @core-light-color;
         border-right-color: transparent;
         border-top-color: transparent;
       }
diff --git a/src/chips.less b/src/chips.less
index 6a0c777..51e4f53 100644
--- a/src/chips.less
+++ b/src/chips.less
@@ -59,7 +59,7 @@
 
   &.selected {
     background: @core-color;
-    color: @core-text-color;
+    color: @core-light-color;
 
     .btn-clear {
       &::before {
diff --git a/src/empty.less b/src/empty.less
new file mode 100644
index 0000000..b460f50
--- /dev/null
+++ b/src/empty.less
@@ -0,0 +1,18 @@
+// Empty states (or Blank slates)
+.empty {
+  background: #f8f8f8;
+  border-radius: .3rem;
+  text-align: center;
+  padding: 2 * @layout-gutter;
+
+  .empty-title {
+    font-size: 1.8rem;
+    margin: 1.5rem 0 .5rem 0;
+  }
+  .empty-meta {
+    color: @core-meta-color;
+  }
+  .btn {
+    margin-top: 1.5rem;
+  }
+}
\ No newline at end of file
diff --git a/src/fileicons.less b/src/fileicons.less
index a6e1f89..0e2c7eb 100644
--- a/src/fileicons.less
+++ b/src/fileicons.less
@@ -29,7 +29,7 @@
   &::after {
     border-bottom-left-radius: .2rem;
     border-color: rgba(255, 255, 255, .5);
-    color: @core-text-color;
+    color: @core-light-color;
     content: attr(data-type);
     font-size: 1rem;
     line-height: 3.6rem;
diff --git a/src/forms.less b/src/forms.less
index 5527b52..96049c9 100644
--- a/src/forms.less
+++ b/src/forms.less
@@ -230,13 +230,12 @@
     }
   }
 }
-
 // Form element: Input groups
 .input-group {
   display: flex;
 
   .input-group-addon {
-    background: @core-border-color;
+    background: lighten(@core-border-color, 4%);
     border: .1rem solid @control-color;
     border-radius: .3rem;
     line-height: 1.6rem;
@@ -268,3 +267,9 @@
     }
   }
 }
+// Form inline
+.form-inline {
+  display: inline-block;
+  vertical-align: middle;
+  width: auto;
+}
diff --git a/src/layout.less b/src/layout.less
index 6a9a643..dbc48c9 100644
--- a/src/layout.less
+++ b/src/layout.less
@@ -8,18 +8,15 @@
   width: 100%;
   &:extend(.clearfix all);
 }
-@media screen and (min-width: 981px) {
+// Grid sizes
+@media screen and (min-width: (960px + 2 * @html-font-size * @layout-gutter)) {
   .grid-960 {
-    margin-left: auto;
-    margin-right: auto;
-    width: 96rem;
+    width: 96rem + 2 * @layout-gutter;
   }
 }
-@media screen and (min-width: 481px) {
+@media screen and (min-width: (480px + 2 * @html-font-size * @layout-gutter)) {
   .grid-480 {
-    margin-left: auto;
-    margin-right: auto;
-    width: 48rem;
+    width: 48rem + 2 * @layout-gutter;
   }
 }
 
@@ -84,7 +81,7 @@
 .col-1 {
   width: 8.33333333%;
 }
-@media screen and (min-width: (@size-xs+1px)) {
+@media screen and (min-width: (@size-xs + 1px)) {
   .col-xs-12,
   .col-xs-11,
   .col-xs-10,
@@ -136,7 +133,7 @@
     width: 8.33333333%;
   }
 }
-@media screen and (min-width: (@size-sm+1px)) {
+@media screen and (min-width: (@size-sm + 1px)) {
   .col-sm-12,
   .col-sm-11,
   .col-sm-10,
@@ -188,7 +185,7 @@
     width: 8.33333333%;
   }
 }
-@media screen and (min-width: (@size-md+1px)) {
+@media screen and (min-width: (@size-md + 1px)) {
   .col-md-12,
   .col-md-11,
   .col-md-10,
@@ -240,7 +237,7 @@
     width: 8.33333333%;
   }
 }
-@media screen and (min-width: (@size-md+1px)) {
+@media screen and (min-width: (@size-md + 1px)) {
   .form-horizontal {
     padding: 1rem;
 
diff --git a/src/navbar.less b/src/navbar.less
new file mode 100644
index 0000000..2fa4eac
--- /dev/null
+++ b/src/navbar.less
@@ -0,0 +1,13 @@
+// Navbar
+.navbar {
+  align-items: center;
+  display: flex;
+  justify-content: space-between;
+  padding: 1rem;
+
+  .navbar-brand {
+    font-size: 2rem;
+    text-decoration: none;
+    vertical-align: middle;
+  }
+}
\ No newline at end of file
diff --git a/src/navigation.less b/src/navigation.less
index 7e1967b..0fd8d0c 100644
--- a/src/navigation.less
+++ b/src/navigation.less
@@ -108,7 +108,7 @@
     &.active {
       a {
         background: @core-color;
-        color: @core-text-color;
+        color: @core-light-color;
       }
     }
   }
diff --git a/src/tooltips.less b/src/tooltips.less
index 9e71540..33928ae 100644
--- a/src/tooltips.less
+++ b/src/tooltips.less
@@ -6,7 +6,7 @@
     background: fade(#333, 90%);
     border-radius: .3rem;
     bottom: 100%;
-    color: @core-text-color;
+    color: @core-light-color;
     content: attr(data-tooltip);
     display: block;
     font-size: 1.2rem;
diff --git a/src/variables.less b/src/variables.less
index 0b32da0..4b3e163 100644
--- a/src/variables.less
+++ b/src/variables.less
@@ -1,6 +1,7 @@
 // Core variables
-
 // Global
+@html-font-size: 10px;
+@html-line-height: 1.428571429;
 @body-bg: #fff;
 @body-font-color: #333;
 @body-font-size: 1.4rem;
@@ -11,7 +12,8 @@
 
 // Colors
 @core-color: #5764c6;
-@core-text-color: #fff;
+@core-light-color: #fff;
+@core-meta-color: #888;
 @core-link-color: #5764c6;
 @core-border-color: #efefef;
 @control-color: #c5c5c5;
@@ -20,7 +22,7 @@
 @control-color-warning: #ffb700;
 @control-color-danger: #e85600;
 
-// Responsive Breakpoints
+// Responsive breakpoints
 @size-xs: 480px;
 @size-sm: 600px;
 @size-md: 840px;
@@ -38,7 +40,7 @@
 .toast-variant(@color) {
   background: @color;
   border-color: darken(@color, 2%);
-  color: @core-text-color;
+  color: @core-light-color;
 }
 .label-base() {
   border-radius: .2rem;
@@ -49,5 +51,5 @@
 }
 .label-variant(@color) {
   background: @color;
-  color: @core-text-color;
+  color: @core-light-color;
 }