Merge pull request #129 from picturepan2/feature/dropdowns v0.1.31

Feature/dropdowns

15 files changed, 673 insertions, 209 deletions

diff --git a/README.md b/README.md
index e399f94..af116bd 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ You can compile your custom version of Spectre.css. Read [the documentation](htt
 - [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
 - [labels](http://picturepan2.github.io/spectre/#labels) - formatted text tags for highlighted, informative information
-- [media](http://picturepan2.github.io/spectre/#media) - responsive image and video class
+- [media](http://picturepan2.github.io/spectre/#media) - responsive images, figures and video classes
 
 #### Layout
 - [flexbox-grid](http://picturepan2.github.io/spectre/#grid) - flexbox based responsive grid system
@@ -55,6 +55,7 @@ You can compile your custom version of Spectre.css. Read [the documentation](htt
 - [badges](http://picturepan2.github.io/spectre/#badges) - unread number indicators
 - [toasts](http://picturepan2.github.io/spectre/#toasts) - showing alerts or notifications
 - [menus](http://picturepan2.github.io/spectre/#menus) - list of links or buttons for actions and navigation
+- [dropdowns](http://picturepan2.github.io/spectre/#dropdowns) - combination of buttons and menus
 - [navigation](http://picturepan2.github.io/spectre/#navigation) - breadcrumb, tabs and pagination
 - [modals](http://picturepan2.github.io/spectre/#modals) - flexible dialog prompts
 - [cards](http://picturepan2.github.io/spectre/#cards) - flexible content containers
diff --git a/bower.json b/bower.json
index 42b464a..04804d7 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "spectre.css",
-  "version": "0.1.30",
+  "version": "0.1.31",
   "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 1674bbe..170be5d 100644
--- a/dist/spectre.css
+++ b/dist/spectre.css
@@ -1,9 +1,12 @@
-/*! normalize.css v4.2.0 | MIT License | github.com/necolas/normalize.css */
+/*! normalize.css v5.0.0 | MIT License | github.com/necolas/normalize.css */
 /**
  * 1. Change the default font family in all browsers (opinionated).
  * 2. Correct the line height in all browsers.
- * 3. Prevent adjustments of font size after orientation changes in IE and iOS.
+ * 3. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
  */
+/* Document
+   ========================================================================== */
 html {
   font-family: sans-serif;
   /* 1 */
@@ -14,65 +17,74 @@ html {
   -ms-text-size-adjust: 100%;
   /* 3 */
 }
+/* Sections
+   ========================================================================== */
 /**
  * Remove the margin in all browsers (opinionated).
  */
 body {
   margin: 0;
 }
-/* HTML5 display definitions
-   ========================================================================== */
 /**
  * Add the correct display in IE 9-.
- * 1. Add the correct display in Edge, IE, and Firefox.
- * 2. Add the correct display in IE.
  */
 article,
 aside,
-details,
-figcaption,
-figure,
 footer,
 header,
-main,
-menu,
 nav,
-section,
-summary {
-  /* 1 */
+section {
   display: block;
 }
 /**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
+ */
+h1 {
+  font-size: 2em;
+  margin: .67em 0;
+}
+/* Grouping content
+   ========================================================================== */
+/**
  * Add the correct display in IE 9-.
+ * 1. Add the correct display in IE.
  */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
+figcaption,
+figure,
+main {
+  /* 1 */
+  display: block;
 }
 /**
- * Add the correct display in iOS 4-7.
+ * Add the correct margin in IE 8.
  */
-audio:not([controls]) {
-  display: none;
-  height: 0;
+figure {
+  margin: 1em 40px;
 }
 /**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge and IE.
  */
-progress {
-  vertical-align: baseline;
+hr {
+  box-sizing: content-box;
+  /* 1 */
+  height: 0;
+  /* 1 */
+  overflow: visible;
+  /* 2 */
 }
 /**
- * Add the correct display in IE 10-.
- * 1. Add the correct display in IE.
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
  */
-template,
-[hidden] {
-  display: none;
+pre {
+  font-family: monospace, monospace;
+  /* 1 */
+  font-size: 1em;
+  /* 2 */
 }
-/* Links
+/* Text-level semantics
    ========================================================================== */
 /**
  * 1. Remove the gray background on active links in IE 10.
@@ -92,8 +104,6 @@ a:active,
 a:hover {
   outline-width: 0;
 }
-/* Text-level semantics
-   ========================================================================== */
 /**
  * 1. Remove the bottom border in Firefox 39-.
  * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
@@ -121,18 +131,22 @@ strong {
   font-weight: bolder;
 }
 /**
- * Add the correct font style in Android 4.3-.
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
  */
-dfn {
-  font-style: italic;
+code,
+kbd,
+samp {
+  font-family: monospace, monospace;
+  /* 1 */
+  font-size: 1em;
+  /* 2 */
 }
 /**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
+ * Add the correct font style in Android 4.3-.
  */
-h1 {
-  font-size: 2em;
-  margin: .67em 0;
+dfn {
+  font-style: italic;
 }
 /**
  * Add the correct background and color in IE 9-.
@@ -167,54 +181,35 @@ sup {
 /* Embedded content
    ========================================================================== */
 /**
- * Remove the border on images inside links in IE 10-.
- */
-img {
-  border-style: none;
-}
-/**
- * Hide the overflow in IE.
+ * Add the correct display in IE 9-.
  */
-svg:not(:root) {
-  overflow: hidden;
+audio,
+video {
+  display: inline-block;
 }
-/* Grouping content
-   ========================================================================== */
 /**
- * 1. Correct the inheritance and scaling of font size in all browsers.
- * 2. Correct the odd `em` font sizing in all browsers.
+ * Add the correct display in iOS 4-7.
  */
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace;
-  /* 1 */
-  font-size: 1em;
-  /* 2 */
+audio:not([controls]) {
+  display: none;
+  height: 0;
 }
 /**
- * Add the correct margin in IE 8.
+ * Remove the border on images inside links in IE 10-.
  */
-figure {
-  margin: 1em 40px;
+img {
+  border-style: none;
 }
 /**
- * 1. Add the correct box sizing in Firefox.
- * 2. Show the overflow in Edge and IE.
+ * Hide the overflow in IE.
  */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */
+svg:not(:root) {
+  overflow: hidden;
 }
 /* Forms
    ========================================================================== */
 /**
- * 1. Change font properties to `inherit` in all browsers (opinionated).
+ * 1. Change the font styles in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
  */
 button,
@@ -222,18 +217,16 @@ input,
 optgroup,
 select,
 textarea {
-  font: inherit;
+  font-family: sans-serif;
+  /* 1 */
+  font-size: 100%;
+  /* 1 */
+  line-height: 1.15;
   /* 1 */
   margin: 0;
   /* 2 */
 }
 /**
- * Restore the font weight unset by the previous rule.
- */
-optgroup {
-  font-weight: bold;
-}
-/**
  * Show the overflow in IE.
  * 1. Show the overflow in Edge.
  */
@@ -311,6 +304,16 @@ legend {
   /* 1 */
 }
 /**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+progress {
+  display: inline-block;
+  /* 1 */
+  vertical-align: baseline;
+  /* 2 */
+}
+/**
  * Remove the default vertical scrollbar in IE.
  */
 textarea {
@@ -345,20 +348,13 @@ textarea {
   /* 2 */
 }
 /**
- * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
+ * Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
  */
 [type="search"]::-webkit-search-cancel-button,
 [type="search"]::-webkit-search-decoration {
   -webkit-appearance: none;
 }
 /**
- * Correct the text style of placeholders in Chrome, Edge, and Safari.
- */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: .54;
-}
-/**
  * 1. Correct the inability to style clickable types in iOS and Safari.
  * 2. Change font properties to `inherit` in Safari.
  */
@@ -368,6 +364,44 @@ textarea {
   font: inherit;
   /* 2 */
 }
+/* Interactive
+   ========================================================================== */
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+details,
+menu {
+  display: block;
+}
+/*
+ * Add the correct display in all browsers.
+ */
+summary {
+  display: list-item;
+}
+/* Scripting
+   ========================================================================== */
+/**
+ * Add the correct display in IE 9-.
+ */
+canvas {
+  display: inline-block;
+}
+/**
+ * Add the correct display in IE.
+ */
+template {
+  display: none;
+}
+/* Hidden
+   ========================================================================== */
+/**
+ * Add the correct display in IE 10-.
+ */
+[hidden] {
+  display: none;
+}
 *,
 *::before,
 *::after {
@@ -408,6 +442,16 @@ a:hover {
   margin-right: .2rem;
   vertical-align: -20%;
 }
+.icon-caret {
+  border-left: .4rem solid transparent;
+  border-right: .4rem solid transparent;
+  border-top: .4rem solid currentColor;
+  display: inline-block;
+  height: 0;
+  margin: 0 .2rem;
+  vertical-align: middle;
+  width: 0;
+}
 h1,
 h2,
 h3,
@@ -672,15 +716,15 @@ pre code {
   -ms-flex: 1 0 auto;
   flex: 1 0 auto;
 }
-.btn-group .btn:first-child:not(:last-child) {
+.btn-group .btn:first-of-type:not(:last-of-type) {
   border-bottom-right-radius: 0;
   border-top-right-radius: 0;
 }
-.btn-group .btn:not(:first-child):not(:last-child) {
+.btn-group .btn:not(:first-of-type):not(:last-of-type) {
   border-radius: 0;
   margin-left: -.1rem;
 }
-.btn-group .btn:last-child:not(:first-child) {
+.btn-group .btn:last-of-type:not(:first-of-type) {
   border-bottom-left-radius: 0;
   border-top-left-radius: 0;
   margin-left: -.1rem;
@@ -701,6 +745,8 @@ pre code {
 }
 .form-input {
   -webkit-appearance: none;
+  -moz-appearance: none;
+  appearance: none;
   background: #fff;
   background-image: none;
   border: .1rem solid #c5c5c5;
@@ -752,6 +798,9 @@ textarea.form-input {
 .form-input.is-danger {
   border-color: #e85600;
 }
+.form-input[type=file] {
+  height: auto;
+}
 .form-input-hint {
   color: #888;
   margin-top: .4rem;
@@ -777,10 +826,14 @@ textarea.form-input {
   border-radius: .3rem;
   font-size: 1.4rem;
   line-height: 1.6rem;
+  min-width: 18rem;
   outline: 0;
   padding: .5rem .8rem;
   vertical-align: middle;
 }
+.form-select[multiple] option {
+  padding: .2rem .4rem;
+}
 .form-select:not([multiple]) {
   background: #fff url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAUCAMAAACzvE1FAAAADFBMVEUzMzMzMzMzMzMzMzMKAG/3AAAAA3RSTlMAf4C/aSLHAAAAPElEQVR42q3NMQ4AIAgEQTn//2cLdRKppSGzBYwzVXvznNWs8C58CiussPJj8h6NwgorrKRdTvuV9v16Afn0AYFOB7aYAAAAAElFTkSuQmCC) no-repeat right .75rem center / .8rem 1rem;
   height: 3.2rem;
@@ -1025,8 +1078,16 @@ textarea.form-input {
   white-space: nowrap;
 }
 .label.label-primary {
-  background: rgba(87, 100, 198, .9);
-  border-color: #5764c6;
+  background: #5764c6;
+  color: #fff;
+}
+.label.label-success {
+  background: #32b643;
+  color: #fff;
+}
+.label.label-danger {
+  background: #e85600;
+  color: #fff;
 }
 .img-responsive {
   display: block;
@@ -1059,6 +1120,13 @@ textarea.form-input {
   padding-bottom: 75%;
   /* 4:3 */
 }
+.figure {
+  margin: 0 0 1rem 0;
+}
+.figure .figure-caption {
+  color: #888;
+  margin-top: 1rem;
+}
 .container {
   margin-left: auto;
   margin-right: auto;
@@ -1912,6 +1980,26 @@ textarea.form-input {
   transform: translateY(-1rem);
   width: 100%;
 }
+.dropdown {
+  position: relative;
+}
+.dropdown .menu {
+  -webkit-animation: slide-down .216s;
+  animation: slide-down .216s;
+  display: none;
+  left: 0;
+  min-width: 18rem;
+  position: absolute;
+  top: 100%;
+  -webkit-transform: translateY(.5rem);
+  -ms-transform: translateY(.5rem);
+  transform: translateY(.5rem);
+}
+.dropdown.active .menu,
+.dropdown .dropdown-toggle:focus + .menu,
+.dropdown .menu:hover {
+  display: block;
+}
 .breadcrumb,
 .tab,
 .pagination {
diff --git a/dist/spectre.min.css b/dist/spectre.min.css
index 45935d9..4f559c9 100644
--- a/dist/spectre.min.css
+++ b/dist/spectre.min.css
@@ -1 +1 @@
-/*! normalize.css v4.2.0 | MIT License | github.com/necolas/normalize.css */.toast a,a{text-decoration:underline}progress,sub,sup{vertical-align:baseline}button,hr,input{overflow:visible}html,legend{box-sizing:border-box}pre,textarea{overflow:auto}blockquote p:last-child,pre code{margin-bottom:0}.btn,.menu .menu-item{-webkit-user-select:none}.btn-group .btn.active,.btn-group .btn:active,.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;-webkit-text-decoration-skip:objects;color:#5764c6}a:active,a:hover{outline-width:0}abbr[title]{border-bottom:none;text-decoration:underline dotted;text-decoration:underline}.btn,.btn.btn-clear,.chip-sm{text-decoration:none}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,optgroup,select,textarea{font:inherit;margin:0}optgroup{font-weight:700}button,select{text-transform:none}[type=reset],[type=submit],button,html [type=button]{-webkit-appearance:button}[type=button]::-moz-focus-inner,[type=reset]::-moz-focus-inner,[type=submit]::-moz-focus-inner,button::-moz-focus-inner{border-style:none;padding:0}[type=button]:-moz-focusring,[type=reset]:-moz-focusring,[type=submit]:-moz-focusring,button:-moz-focusring{outline:ButtonText dotted 1px}fieldset{border:1px solid silver;margin:0 2px;padding:.35em .625em .75em}legend{color:inherit;display:table;max-width:100%;padding:0;white-space:normal}.btn,.chip .chip-content,.chip-sm .chip-name,.label,code{white-space:nowrap}[type=checkbox],[type=radio]{box-sizing:border-box;padding:0}[type=number]::-webkit-inner-spin-button,[type=number]::-webkit-outer-spin-button{height:auto}[type=search]{-webkit-appearance:textfield;outline-offset:-2px}[type=search]::-webkit-search-cancel-button,[type=search]::-webkit-search-decoration{-webkit-appearance:none}::-webkit-input-placeholder{color:inherit;opacity:.54}::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}*,::after,::before{box-sizing:inherit}html{font-size:10px;line-height:1.42857143;-webkit-tap-highlight-color:transparent}body{margin:0;background:#fff;color:#333;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Ubuntu,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Hiragino Kaku Gothic Pro",Meiryo,"Malgun Gothic","Helvetica Neue",sans-serif;font-size:1.4rem;overflow-x:hidden}a:focus,a:hover{color:#283176}.disabled,[disabled]{cursor:default;opacity:.75;pointer-events:none}.btn,.form-switch,.hand{cursor:pointer}.btn .icon,.menu .icon,.toast .icon{font-size:1.3333em;line-height:.8em;margin-right:.2rem;vertical-align:-20%}pre,pre code{line-height:1.8rem}h1,h2,h3,h4,h5,h6{color:inherit;font-weight:300;line-height:1.1;margin-bottom:1.5rem;margin-top:2.5rem}h1{font-size:5rem}h2{font-size:4rem}h3{font-size:3rem}h4{font-size:2.4rem}h5{font-size:2rem}h6{font-size:1.6rem}p{margin:0 0 1rem}blockquote{border-left:.2rem solid #ddd;margin-left:0;padding:1rem 2rem}blockquote cite{color:#b3b3b3}ol,ul{margin:2rem 0 2rem 2rem;padding:0}ol ol,ol ul,ul ol,ul ul{margin:1.5rem 0 1.5rem 2rem}ol li,ul li{margin-top:1rem}ul{list-style:disc inside}ul ul{list-style-type:circle}ol{list-style:decimal inside}ol ol{list-style-type:lower-alpha}dl dt{font-weight:700}dl dd{margin:.5rem 0 1.5rem}.lead{font-size:120%}.highlight,code,mark{border-radius:.2rem;display:inline;font-size:1em;padding:.1em .3em;vertical-align:baseline}.highlight,mark{background:#ffe5a3}pre{background:#f9f9f9;border-left:.2rem solid #e2e2e2;margin-bottom:1em;margin-top:1em;padding:1.5rem 2.5rem}code{background:#efefef}.btn,.form-select{vertical-align:middle}pre code{background:0 0;border-left:0;margin-top:0}.btn,.form-input{line-height:1.6rem;-webkit-appearance:none;outline:0}.table{border-collapse:collapse;border-spacing:0;text-align:left;width:100%}.btn,.empty{text-align:center}.table.table-striped tbody tr:nth-of-type(odd){background:#fcfcfc}.table.table-hover tbody tr:hover{background:#f4f4f4}.table.table-hover tbody tr.selected{background:#f2f2f2}.table td,.table th{border-bottom:.1rem solid #efefef;padding:1.5rem 1rem}.table th{border-color:#c9c9c9}.btn{background:#fff;border:.1rem solid #5764c6;border-radius:.3rem;color:#5764c6;display:inline-block;font-size:1.4rem;height:3.2rem;padding:.7rem 1rem;-moz-user-select:none;-ms-user-select:none;user-select:none}.btn:focus{background:#f3f4fb}.btn:hover{background:#5764c6;border-color:#4452c0;color:#fff}.btn.active,.btn:active{background:#4452c0;border-color:#3b49af;color:#fff}.btn.btn-primary{background:#5764c6;border-color:#4452c0;color:#fff}.btn.btn-primary:focus{background:#4856c1;border-color:#3b49af;color:#fff}.btn.btn-primary:hover{background:#404fbe;border-color:#35419c;color:#fff}.btn.btn-primary.active,.btn.btn-primary:active{background:#3e4cb6;border-color:#35419c;color:#fff}.btn.btn-primary.loading::after{border-color:transparent transparent #fff #fff}.btn.btn-link{background:0 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\ No newline at end of file
diff --git a/index.html b/index.html
index 0d8b6de..9ce5b14 100644
--- a/index.html
+++ b/index.html
@@ -725,6 +725,111 @@
 &lt;<span class="tag">/form</span>&gt;
 </pre>
 
+            <div class="columns">
+                <div class="column col-6 col-sm-12">
+                    <form class="form-horizontal" action="#forms">
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-8">Email</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="email" id="input-example-8" placeholder="Email" value="spectre@example.com" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-9">URL</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="url" id="input-example-9" placeholder="URL" value="https://github.com/picturepan2/spectre">
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-10">Search</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="search" id="input-example-10" placeholder="Search" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-11">Tel</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="tel" id="input-example-11" placeholder="Tel" value="1-(888)-888-8888" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-12">Password</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="password" id="input-example-12" placeholder="Password" value="123456789" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-13">Number</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="number" id="input-example-13" placeholder="00" value="66" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-14">Date</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="date" id="input-example-14" value="2016-12-31" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-15">Color</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="color" id="input-example-15" value="#5764c6" />
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-16">File</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="file" id="input-example-16" value="" />
+                            </div>
+                        </div>
+                        <div class="form-group hide">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-17">Slider</label>
+                            </div>
+                            <div class="col-9">
+                                <input class="form-input" type="range" min="0" max="50" value="25" />
+                            </div>
+                        </div>
+                        <div class="form-group hide">
+                            <div class="col-3">
+                                <label class="form-label" for="input-example-18">Progress</label>
+                            </div>
+                            <div class="col-9">
+                                <progress class="progress" value="50" max="100"></progress>
+                            </div>
+                        </div>
+                        <div class="form-group">
+                            <div class="col-3"></div>
+                            <div class="col-9">
+                                <select class="form-select" multiple>
+                                    <option>Slack</option>
+                                    <option>Skype</option>
+                                    <option>Hipchat</option>
+                                </select>
+                            </div>
+                        </div>
+                    </form>
+                </div>
+            </div>
+
             <section class="notes">
                 <p>To use form validation styles, add <code>is-success</code> and <code>is-danger</code> to the controls or add <code>has-success</code> and <code>has-danger</code> to parent elements. You can use the class <code>form-input-hint</code> to provide form validation success and error messages.</p>
             </section>
@@ -820,6 +925,27 @@
             <div class="columns">
                 <div class="column col-xs-12">
                     <div class="input-group">
+                        <span class="input-group-addon addon-sm">slack.com/</span>
+                        <input type="text" class="form-input input-sm" placeholder="site name" />
+                    </div>
+                </div>
+                <div class="column col-xs-12">
+                    <div class="input-group">
+                        <input type="text" class="form-input input-sm" placeholder="username" />
+                        <span class="input-group-addon addon-sm">@slack.com</span>
+                    </div>
+                </div>
+                <div class="column col-xs-12">
+                    <div class="input-group">
+                        <span class="input-group-addon addon-sm">slack.com/</span>
+                        <input type="text" class="form-input input-sm" placeholder="site name" />
+                        <button class="btn btn-primary input-group-btn btn-sm">Submit</button>
+                    </div>
+                </div>
+            </div>
+            <div class="columns">
+                <div class="column col-xs-12">
+                    <div class="input-group">
                         <span class="input-group-addon">slack.com/</span>
                         <input type="text" class="form-input" placeholder="site name" />
                     </div>
@@ -841,8 +967,8 @@
             <div class="columns">
                 <div class="column col-xs-12">
                     <div class="input-group">
-                        <span class="input-group-addon addon-sm">slack.com/</span>
-                        <input type="text" class="form-input input-sm" placeholder="site name" />
+                        <span class="input-group-addon addon-lg">slack.com/</span>
+                        <input type="text" class="form-input input-lg" placeholder="site name" />
                     </div>
                 </div>
                 <div class="column col-xs-12">
@@ -896,10 +1022,12 @@
                 <div class="column">
                     <span class="label">default label</span>
                     <span class="label label-primary">primary label</span>
+                    <span class="label label-success">success label</span>
+                    <span class="label label-danger">danger label</span>
                 </div>
             </div>
             <section class="notes">
-                <p>Add the class <code>label</code> to &lt;span&gt; or &lt;small&gt; elements. You can add another class <code>label-primary</code> for a primary colored label.</p>
+                <p>Add the class <code>label</code> to &lt;span&gt; or &lt;small&gt; elements. You can add another class <code>label-primary</code>, <code>label-success</code> and <code>label-danger</code> for a primary colored label.</p>
             </section>
 
             <!-- labels example -->
@@ -913,31 +1041,48 @@
         <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>
+                <p><strong>Media</strong> include responsive images, figures and video classes. </p>
+                <p>Add the class <code>img-responsive</code> to &lt;img&gt; elements. The images will scale with the parent sizes.</p>
             </section>
             <div class="columns">
                 <div class="column col-6 col-xs-12">
                     <img src="demo/img/osx-el-capitan.jpg" class="img-responsive rounded" />
                 </div>
             </div>
+
             <section class="notes">
-                <p>Add the class <code>img-responsive</code> to &lt;img&gt; elements. The images will scale with the parent sizes.</p>
+                <p>You can use the element <code>&lt;figure&gt;</code> for an image with a caption. Add the class <code>figure</code> to &lt;figure&gt; element. The images with the class <code>img-responsive</code> will be responsive. And the included class <code>figure-caption</code> will provide basic style for caption. Also, you can use <code>text-left</code>, <code>text-center</code> and <code>text-right</code> for caption alignment.  </p>
             </section>
             <div class="columns">
                 <div class="column col-6 col-xs-12">
-                    <div class="video-responsive">
-                        <iframe src="https://www.youtube.com/embed/vBfBa-gCMQk" width="560" height="315" frameborder="0" allowfullscreen></iframe>
-                    </div>
+                    <figure class="figure">
+                        <img src="demo/img/osx-yosemite-2.jpg" class="img-responsive rounded" />
+                        <figcaption class="figure-caption text-center">macOS Yosemite wallpaper</figcaption>
+                    </figure>
+
                 </div>
             </div>
+
             <section class="notes">
                 <p>For responsive video, add a container with the class <code>video-responsive</code>. Insert any YouTube, Youku or other iframe/embed video inside the container. The ratio is 16:9 by default. You may add <code>.video-responsive-4-3</code> for 4:3 ratio video container.</p>
             </section>
+            <div class="columns">
+                <div class="column col-6 col-xs-12">
+                    <div class="video-responsive">
+                        <iframe src="https://www.youtube.com/embed/vBfBa-gCMQk" width="560" height="315" frameborder="0" allowfullscreen></iframe>
+                    </div>
+                </div>
+            </div>
 
             <!-- media example -->
 <pre class="code lang-html">
 &lt;<span class="tag">img</span> <span class="atn">src</span>=<span class="atv">&quot;img/osx-el-capitan.jpg&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;img-responsive rounded&quot;</span> /&gt;
 
+&lt;<span class="tag">figure</span> <span class="atn">class</span>=<span class="atv">&quot;figure&quot;</span>&gt;
+    &lt;<span class="tag">img</span> <span class="atn">src</span>=<span class="atv">&quot;img/osx-yosemite-2.jpg&quot;</span> <span class="atn">class</span>=<span class="atv">&quot;img-responsive rounded&quot;</span> /&gt;
+    &lt;<span class="tag">figcaption</span> <span class="atn">class</span>=<span class="atv">&quot;figure-caption text-center&quot;</span>&gt;macOS Yosemite wallpaper&lt;<span class="tag">/figcaption</span>&gt;
+&lt;<span class="tag">/figure</span>&gt;
+
 &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;video-responsive&quot;</span>&gt;
     &lt;<span class="tag">iframe</span> <span class="atn">src</span>=<span class="atv">&quot;https://www.youtube.com/embed/vBfBa-gCMQk&quot;</span> <span class="atn">width</span>=<span class="atv">&quot;560&quot;</span> <span class="atn">height</span>=<span class="atv">&quot;315&quot;</span> <span class="atn">frameborder</span>=<span class="atv">&quot;0&quot;</span> <span class="atn">allowfullscreen</span>&gt;&lt;<span class="tag">/iframe</span>&gt;
 &lt;<span class="tag">/div</span>&gt;
@@ -1292,6 +1437,7 @@
                     <a href="#badges" class="btn btn-primary">badges</a>
                     <a href="#toasts" class="btn btn-primary">toasts</a>
                     <a href="#menus" class="btn btn-primary">menus</a>
+                    <a href="#dropdowns" class="btn btn-primary">dropdowns</a>
                     <a href="#navigation" class="btn btn-primary">navigation</a>
                     <a href="#modals" class="btn btn-primary">modals</a>
                     <a href="#cards" class="btn btn-primary">cards</a>
@@ -1885,6 +2031,131 @@
 
         </section>
 
+        <section id="dropdowns" class="container grid-960">
+            <header class="text-center"><h4>dropdowns</h4></header>
+            <section class="notes">
+                <p>A <strong>dropdown</strong> is a combination of buttons and menus.</p>
+            </section>
+            <div class="columns">
+                <div class="column col-xs-6">
+                    <div class="dropdown">
+                        <div class="btn-group">
+                            <a class="btn">dropdown button</a>
+                            <a class="btn dropdown-toggle" tabindex="0"><i class="icon-caret"></i></a>
+                            <ul class="menu">
+                                <li class="menu-item">
+                                    <a href="#dropdowns">
+                                        Slack
+                                    </a>
+                                </li>
+                                <li class="menu-item">
+                                    <a href="#dropdowns">
+                                        Hipchat
+                                    </a>
+                                </li>
+                                <li class="menu-item">
+                                    <a href="#dropdowns">
+                                        Skype
+                                    </a>
+                                </li>
+                            </ul>
+                        </div>
+                    </div>
+                </div>
+                <div class="column col-xs-6">
+                    <div class="dropdown">
+                        <a class="btn btn-primary dropdown-toggle" tabindex="0">dropdown button</a>
+                        <ul class="menu">
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Slack
+                                </a>
+                            </li>
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Hipchat
+                                </a>
+                            </li>
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Skype
+                                </a>
+                            </li>
+                        </ul>
+                    </div>
+                </div>
+                <div class="column col-xs-6">
+                    <div class="dropdown">
+                        <a class="btn btn-link dropdown-toggle" tabindex="0">dropdown button <i class="icon-caret"></i></a>
+                        <ul class="menu">
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Slack
+                                </a>
+                            </li>
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Hipchat
+                                </a>
+                            </li>
+                            <li class="menu-item">
+                                <a href="#dropdowns">
+                                    Skype
+                                </a>
+                            </li>
+                        </ul>
+                    </div>
+                </div>
+            </div>
+            <section class="notes">
+                <p>Dropdown menus component is built entirely in CSS. It is triggered by <code>:focus</code> event.</p>
+                <p>Add a container element with the class <code>dropdown</code>. And add a focusable element with the classname <code>dropdown-toggle</code> for the button and a <code>menu</code> component right next to it. </p>
+            </section>
+            <section class="notes">
+                <p>Also, you can implement your JS to interact with the dropdown menus by adding the class <code>active</code> to the <code>dropdown</code>.</p>
+            </section>
+
+            <!-- dropdowns example -->
+<pre class="code lang-html">
+  &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;dropdown&quot;</span>&gt;
+      <span class="com">&lt;!-- basic dropdown button --&gt;</span>
+      &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 dropdown-toggle&quot;</span> <span class="atn">tabindex</span>=<span class="atv">&quot;0&quot;</span>&gt;
+          dropdown menu &lt;<span class="tag">i</span> <span class="atn">class</span>=<span class="atv">&quot;icon-caret&quot;</span>&gt;&lt;<span class="tag">/i</span>&gt;
+      &lt;<span class="tag">/a</span>&gt;
+      <span class="com">&lt;!-- menu component --&gt;</span>
+      &lt;<span class="tag">ul</span> <span class="atn">class</span>=<span class="atv">&quot;menu&quot;</span>&gt;
+          &lt;<span class="tag">li</span> <span class="atn">class</span>=<span class="atv">&quot;menu-item&quot;</span>&gt;
+              &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span>&gt;Slack&lt;<span class="tag">/a</span>&gt;
+          &lt;<span class="tag">/li</span>&gt;
+          &lt;<span class="tag">li</span> <span class="atn">class</span>=<span class="atv">&quot;menu-item&quot;</span>&gt;
+              &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span>&gt;Hipchat&lt;<span class="tag">/a</span>&gt;
+          &lt;<span class="tag">/li</span>&gt;
+          &lt;<span class="tag">li</span> <span class="atn">class</span>=<span class="atv">&quot;menu-item&quot;</span>&gt;
+              &lt;<span class="tag">a</span> <span class="atn">href</span>=<span class="atv">&quot;#&quot;</span>&gt;Skype&lt;<span class="tag">/a</span>&gt;
+          &lt;<span class="tag">/li</span>&gt;
+      &lt;<span class="tag">/ul</span>&gt;
+  &lt;<span class="tag">/div</span>&gt;
+
+  &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;dropdown&quot;</span>&gt;
+      <span class="com">&lt;!-- dropdown button group --&gt;</span>
+      &lt;<span class="tag">div</span> <span class="atn">class</span>=<span class="atv">&quot;btn-group&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&quot;</span>&gt;
+              dropdown button
+          &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 dropdown-toggle&quot;</span> <span class="atn">tabindex</span>=<span class="atv">&quot;0&quot;</span>&gt;
+              &lt;<span class="tag">i</span> <span class="atn">class</span>=<span class="atv">&quot;icon-caret&quot;</span>&gt;&lt;<span class="tag">/i</span>&gt;
+          &lt;<span class="tag">/a</span>&gt;
+
+          <span class="com">&lt;!-- menu component --&gt;</span>
+          &lt;<span class="tag">ul</span> <span class="atn">class</span>=<span class="atv">&quot;menu&quot;</span>&gt;
+              ...
+          &lt;<span class="tag">/ul</span>&gt;
+      &lt;<span class="tag">/div</span>&gt;
+  &lt;<span class="tag">/div</span>&gt;
+</pre>
+
+        </section>
+
         <section id="navigation" class="container grid-960">
             <header class="text-center"><h4>navigation</h4></header>
             <section class="notes">
@@ -2624,7 +2895,7 @@
     <footer class="bg-grey">
         <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: 0.1.30
+                <a href="https://github.com/picturepan2/spectre" target="_blank">GitHub Repo</a> | <a href="#">Back to top</a> | version: 0.1.31
             </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 25d00aa..2928498 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "spectre.css",
-  "version": "0.1.30",
+  "version": "0.1.31",
   "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 54e1636..9ec5ce6 100644
--- a/spectre.less
+++ b/spectre.less
@@ -29,6 +29,7 @@
 @import 'src/badges.less';
 @import 'src/toasts.less';
 @import 'src/menus.less';
+@import 'src/dropdowns.less';
 @import 'src/navigation.less';
 @import 'src/modals.less';
 @import 'src/cards.less';
diff --git a/src/base.less b/src/base.less
index f6bd606..6cba96c 100644
--- a/src/base.less
+++ b/src/base.less
@@ -45,3 +45,15 @@ a {
     vertical-align: -20%;
   }
 }
+
+// Caret
+.icon-caret {
+  border-top: .4rem solid currentColor;
+  border-right: .4rem solid transparent;
+  border-left: .4rem solid transparent;
+  display: inline-block;
+  height: 0;
+  margin: 0 .2rem;
+  vertical-align: middle;
+  width: 0;
+}
diff --git a/src/buttons.less b/src/buttons.less
index a21566b..260665a 100644
--- a/src/buttons.less
+++ b/src/buttons.less
@@ -135,15 +135,15 @@
   .btn {
     flex: 1 0 auto;
 
-    &:first-child:not(:last-child) {
+    &:first-of-type:not(:last-of-type) {
       border-bottom-right-radius: 0;
       border-top-right-radius: 0;
     }
-    &:not(:first-child):not(:last-child) {
+    &:not(:first-of-type):not(:last-of-type) {
       border-radius: 0;
       margin-left: -.1rem;
     }
-    &:last-child:not(:first-child) {
+    &:last-of-type:not(:first-of-type) {
       border-bottom-left-radius: 0;
       border-top-left-radius: 0;
       margin-left: -.1rem;
diff --git a/src/dropdowns.less b/src/dropdowns.less
new file mode 100644
index 0000000..af61541
--- /dev/null
+++ b/src/dropdowns.less
@@ -0,0 +1,20 @@
+// Dropdown
+.dropdown {
+  position: relative;
+
+  .menu {
+    animation: slide-down .216s;
+    display: none;
+    left: 0;
+    min-width: @control-min-width;
+    position: absolute;
+    top: 100%;
+    transform: translateY(.5rem);
+  }
+
+  &.active .menu,
+  .dropdown-toggle:focus + .menu,
+  .menu:hover {
+    display: block;
+  }
+}
diff --git a/src/forms.less b/src/forms.less
index cd26924..131fbc5 100644
--- a/src/forms.less
+++ b/src/forms.less
@@ -4,7 +4,7 @@
 }
 // Form element: Input boxes
 .form-input {
-  -webkit-appearance: none;
+  appearance: none;
   background: #fff;
   background-image: none;
   border: .1rem solid @control-color;
@@ -64,6 +64,11 @@
   &.is-danger {
     border-color: @control-color-danger;
   }
+
+  // Input types
+  &[type=file] {
+    height: auto;
+  }
 }
 
 // Form element: Input note
@@ -96,9 +101,15 @@
   border-radius: .3rem;
   font-size: 1.4rem;
   line-height: 1.6rem;
+  min-width: @control-min-width;
   outline: 0;
   padding: .5rem .8rem;
   vertical-align: middle;
+  &[multiple] {
+    option {
+      padding: .2rem .4rem;
+    }
+  }
   &:not([multiple]) {
     background: #fff url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAUCAMAAACzvE1FAAAADFBMVEUzMzMzMzMzMzMzMzMKAG/3AAAAA3RSTlMAf4C/aSLHAAAAPElEQVR42q3NMQ4AIAgEQTn//2cLdRKppSGzBYwzVXvznNWs8C58CiussPJj8h6NwgorrKRdTvuV9v16Afn0AYFOB7aYAAAAAElFTkSuQmCC) no-repeat right .75rem center / .8rem 1rem;
     height: 3.2rem;
@@ -118,6 +129,7 @@
     height: 2.4rem;
     padding: .4rem 2rem .4rem .6rem;
   }
+
   &.select-lg {
     font-size: 1.6rem;
     height: 4.2rem;
diff --git a/src/labels.less b/src/labels.less
index 223a4b3..6bdf02c 100644
--- a/src/labels.less
+++ b/src/labels.less
@@ -6,6 +6,14 @@
   white-space: nowrap;
 
   &.label-primary {
-    .toast-variant(@core-color);
+    .label-variant(@core-color);
+  }
+
+  &.label-success {
+    .label-variant(@control-color-success);
+  }
+
+  &.label-danger {
+    .label-variant(@control-color-danger);
   }
 }
diff --git a/src/media.less b/src/media.less
index 5f668fc..d4d2f89 100644
--- a/src/media.less
+++ b/src/media.less
@@ -4,6 +4,7 @@
   height: auto;
   max-width: 100%;
 }
+
 .video-responsive {
   height: 0;
   overflow: hidden;
@@ -26,6 +27,16 @@
     width: 100%;
   }
 }
+
 .video-responsive-4-3 {
   padding-bottom: 75%; /* 4:3 */
 }
+
+.figure {
+  margin: 0 0 @layout-gutter 0;
+
+  .figure-caption {
+    color: @core-meta-color;
+    margin-top: @layout-gutter;
+  }
+}
diff --git a/src/normalize.less b/src/normalize.less
index 1cef7e9..9b77e0e 100644
--- a/src/normalize.less
+++ b/src/normalize.less
@@ -1,11 +1,15 @@
-/*! normalize.css v4.2.0 | MIT License | github.com/necolas/normalize.css */
+/*! normalize.css v5.0.0 | MIT License | github.com/necolas/normalize.css */
 
 /**
  * 1. Change the default font family in all browsers (opinionated).
  * 2. Correct the line height in all browsers.
- * 3. Prevent adjustments of font size after orientation changes in IE and iOS.
+ * 3. Prevent adjustments of font size after orientation changes in
+ *    IE on Windows Phone and in iOS.
  */
 
+/* Document
+   ========================================================================== */
+
 html {
   font-family: sans-serif; /* 1 */
   line-height: 1.15; /* 2 */
@@ -13,6 +17,9 @@ html {
   -webkit-text-size-adjust: 100%; /* 3 */
 }
 
+/* Sections
+   ========================================================================== */
+
 /**
  * Remove the margin in all browsers (opinionated).
  */
@@ -21,69 +28,73 @@ body {
   margin: 0;
 }
 
-/* HTML5 display definitions
-   ========================================================================== */
-
 /**
  * Add the correct display in IE 9-.
- * 1. Add the correct display in Edge, IE, and Firefox.
- * 2. Add the correct display in IE.
  */
 
 article,
 aside,
-details, /* 1 */
-figcaption,
-figure,
 footer,
 header,
-main, /* 2 */
-menu,
 nav,
-section,
-summary { /* 1 */
+section {
   display: block;
 }
 
 /**
+ * Correct the font size and margin on `h1` elements within `section` and
+ * `article` contexts in Chrome, Firefox, and Safari.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
  * Add the correct display in IE 9-.
+ * 1. Add the correct display in IE.
  */
 
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
+figcaption,
+figure,
+main { /* 1 */
+  display: block;
 }
 
 /**
- * Add the correct display in iOS 4-7.
+ * Add the correct margin in IE 8.
  */
 
-audio:not([controls]) {
-  display: none;
-  height: 0;
+figure {
+  margin: 1em 40px;
 }
 
 /**
- * Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ * 1. Add the correct box sizing in Firefox.
+ * 2. Show the overflow in Edge and IE.
  */
 
-progress {
-  vertical-align: baseline;
+hr {
+  box-sizing: content-box; /* 1 */
+  height: 0; /* 1 */
+  overflow: visible; /* 2 */
 }
 
 /**
- * Add the correct display in IE 10-.
- * 1. Add the correct display in IE.
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
  */
 
-template, /* 1 */
-[hidden] {
-  display: none;
+pre {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
 }
 
-/* Links
+/* Text-level semantics
    ========================================================================== */
 
 /**
@@ -106,9 +117,6 @@ a:hover {
   outline-width: 0;
 }
 
-/* Text-level semantics
-   ========================================================================== */
-
 /**
  * 1. Remove the bottom border in Firefox 39-.
  * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
@@ -139,21 +147,23 @@ strong {
 }
 
 /**
- * Add the correct font style in Android 4.3-.
+ * 1. Correct the inheritance and scaling of font size in all browsers.
+ * 2. Correct the odd `em` font sizing in all browsers.
  */
 
-dfn {
-  font-style: italic;
+code,
+kbd,
+samp {
+  font-family: monospace, monospace; /* 1 */
+  font-size: 1em; /* 2 */
 }
 
 /**
- * Correct the font size and margin on `h1` elements within `section` and
- * `article` contexts in Chrome, Firefox, and Safari.
+ * Add the correct font style in Android 4.3-.
  */
 
-h1 {
-  font-size: 2em;
-  margin: 0.67em 0;
+dfn {
+  font-style: italic;
 }
 
 /**
@@ -198,61 +208,44 @@ sup {
    ========================================================================== */
 
 /**
- * Remove the border on images inside links in IE 10-.
- */
-
-img {
-  border-style: none;
-}
-
-/**
- * Hide the overflow in IE.
+ * Add the correct display in IE 9-.
  */
 
-svg:not(:root) {
-  overflow: hidden;
+audio,
+video {
+  display: inline-block;
 }
 
-/* Grouping content
-   ========================================================================== */
-
 /**
- * 1. Correct the inheritance and scaling of font size in all browsers.
- * 2. Correct the odd `em` font sizing in all browsers.
+ * Add the correct display in iOS 4-7.
  */
 
-code,
-kbd,
-pre,
-samp {
-  font-family: monospace, monospace; /* 1 */
-  font-size: 1em; /* 2 */
+audio:not([controls]) {
+  display: none;
+  height: 0;
 }
 
 /**
- * Add the correct margin in IE 8.
+ * Remove the border on images inside links in IE 10-.
  */
 
-figure {
-  margin: 1em 40px;
+img {
+  border-style: none;
 }
 
 /**
- * 1. Add the correct box sizing in Firefox.
- * 2. Show the overflow in Edge and IE.
+ * Hide the overflow in IE.
  */
 
-hr {
-  box-sizing: content-box; /* 1 */
-  height: 0; /* 1 */
-  overflow: visible; /* 2 */
+svg:not(:root) {
+  overflow: hidden;
 }
 
 /* Forms
    ========================================================================== */
 
 /**
- * 1. Change font properties to `inherit` in all browsers (opinionated).
+ * 1. Change the font styles in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
  */
 
@@ -261,19 +254,13 @@ input,
 optgroup,
 select,
 textarea {
-  font: inherit; /* 1 */
+  font-family: sans-serif; /* 1 */
+  font-size: 100%; /* 1 */
+  line-height: 1.15; /* 1 */
   margin: 0; /* 2 */
 }
 
 /**
- * Restore the font weight unset by the previous rule.
- */
-
-optgroup {
-  font-weight: bold;
-}
-
-/**
  * Show the overflow in IE.
  * 1. Show the overflow in Edge.
  */
@@ -356,6 +343,16 @@ legend {
 }
 
 /**
+ * 1. Add the correct display in IE 9-.
+ * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
+ */
+
+progress {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
  * Remove the default vertical scrollbar in IE.
  */
 
@@ -394,7 +391,7 @@ textarea {
 }
 
 /**
- * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
+ * Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
  */
 
 [type="search"]::-webkit-search-cancel-button,
@@ -403,15 +400,6 @@ textarea {
 }
 
 /**
- * Correct the text style of placeholders in Chrome, Edge, and Safari.
- */
-
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54;
-}
-
-/**
  * 1. Correct the inability to style clickable types in iOS and Safari.
  * 2. Change font properties to `inherit` in Safari.
  */
@@ -419,4 +407,55 @@ textarea {
 ::-webkit-file-upload-button {
   -webkit-appearance: button; /* 1 */
   font: inherit; /* 2 */
-}
\ No newline at end of file
+}
+
+/* Interactive
+   ========================================================================== */
+
+/*
+ * Add the correct display in IE 9-.
+ * 1. Add the correct display in Edge, IE, and Firefox.
+ */
+
+details, /* 1 */
+menu {
+  display: block;
+}
+
+/*
+ * Add the correct display in all browsers.
+ */
+
+summary {
+  display: list-item;
+}
+
+/* Scripting
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 9-.
+ */
+
+canvas {
+  display: inline-block;
+}
+
+/**
+ * Add the correct display in IE.
+ */
+
+template {
+  display: none;
+}
+
+/* Hidden
+   ========================================================================== */
+
+/**
+ * Add the correct display in IE 10-.
+ */
+
+[hidden] {
+  display: none;
+}
diff --git a/src/variables.less b/src/variables.less
index 1fe2f86..2298e32 100644
--- a/src/variables.less
+++ b/src/variables.less
@@ -11,6 +11,7 @@
 
 // Sizes
 @layout-gutter: 1rem;
+@control-min-width: 18rem;
 
 // Colors
 @core-color: #5764c6;