Added h5bp library.

lib/_h5bp.scss

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+// HTML5 Boilerplate
+//
+// What follows is the result of much research on cross-browser styling.
+// Credit left inline and big thanks to Nicolas Gallagher, Jonathan Neal,
+// Kroc Camen, and the h5bp dev community and team.
+
+@import 'h5bp/normalize';
+@import 'h5bp/main';
+@import 'h5bp/browserupgrade';
+@import 'h5bp/errorpage';
+@import 'h5bp/helpers';
+@import 'h5bp/media';
+
+@mixin h5bp-custom {
+    // Redefine this mixin to add custom modifications to H5BP styles.
+
+}
+
+@mixin h5bp {
+    @include h5bp-normalize;
+    @include h5bp-main;
+    @include h5bp-browserupgrade;
+    @include h5bp-errorpage;
+    @include h5bp-custom;
+    @include h5bp-helpers;
+    @include h5bp-media;
+}

lib/h5bp/_browserupgrade.scss

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+// Browser Upgrade Message
+@mixin h5bp-browserupgrade {
+  .browserupgrade {
+      margin: 0.2em 0;
+      background: #ccc;
+      color: #000;
+      padding: 0.2em 0;
+  }
+}

lib/h5bp/_errorpage.scss

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+@mixin h5bp-errorpage {
+    html.errorpages {
+        color: #888;
+        display: table;
+        font-family: sans-serif;
+        height: 100%;
+        text-align: center;
+        width: 100%;
+
+        * {
+            line-height: 1.2;
+            margin: 0;
+        }
+
+        body {
+            display: table-cell;
+            vertical-align: middle;
+            margin: 2em auto;
+        }
+
+        h1 {
+            color: #555;
+            font-size: 2em;
+            font-weight: 400;
+        }
+
+        p {
+            margin: 0 auto;
+            width: 280px;
+        }
+
+        @media only screen and (max-width: 280px) {
+
+            body, p {
+                width: 95%;
+            }
+
+            h1 {
+                font-size: 1.5em;
+                margin: 0 0 0.3em;
+            }
+
+        }
+    }
+}

lib/h5bp/_helpers.scss

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+// Helper classes
+@mixin h5bp-helpers {
+
+  .hidden { @include h5bp-hidden; }
+
+  .visuallyhidden { @include h5bp-visuallyhidden; }
+
+  .invisible { @include h5bp-invisible; }
+
+  .clearfix { @include h5bp-clearfix; }
+
+}
+
+// Hide from both screenreaders and browsers:
+// http://juicystudio.com/article/screen-readers-display-none.php
+@mixin h5bp-hidden {
+  display: none !important;
+  visibility: hidden;
+}
+
+// Hide only visually, but have it available for screenreaders:
+// http://snook.ca/archives/html_and_css/hiding-content-for-accessibility
+@mixin h5bp-visuallyhidden {
+  border: 0;
+  clip: rect(0 0 0 0);
+  height: 1px;
+  margin: -1px;
+  overflow: hidden;
+  padding: 0;
+  position: absolute;
+  width: 1px;
+
+  // Extends the .visuallyhidden class to allow the element to be focusable
+  // when navigated to via the keyboard: https://www.drupal.org/node/897638
+  &.focusable:active,
+  &.focusable:focus {
+    clip: auto;
+    height: auto;
+    margin: 0;
+    overflow: visible;
+    position: static;
+    width: auto;
+  }
+}
+
+// Hide visually and from screenreaders, but maintain layout
+@mixin h5bp-invisible {
+  visibility: hidden;
+}
+
+// Clearfix: contain floats
+//
+// For modern browsers
+// 1. The space content is one way to avoid an Opera bug when the
+//    `contenteditable` attribute is included anywhere else in the document.
+//    Otherwise it causes space to appear at the top and bottom of elements
+//    that receive the `clearfix` class.
+// 2. The use of `table` rather than `block` is only necessary if using
+//    `:before` to contain the top-margins of child elements.
+@mixin h5bp-clearfix {
+  &:before,
+  &:after {
+    content: " "; // 1
+    display: table; // 2
+  }
+
+  &:after {
+    clear: both;
+  }
+}

lib/h5bp/_main.scss

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+$font-color: #222 !default;
+$font-size: 1em !default;
+$line-height: 1.4 !default;
+$selected-background-color: #b3d4fc !default;
+$hr-color: #ccc !default;
+
+@mixin h5bp-main {
+  @include h5bp-base-styles;
+}
+
+// Base styles: opinionated defaults
+@mixin h5bp-base-styles {
+  html {
+      color: $font-color;
+      font-size: $font-size;
+      line-height: $line-height;
+  }
+
+  // Remove text-shadow in selection highlight:
+  // https://twitter.com/miketaylr/status/12228805301
+  // These selection rule sets have to be separate.
+  // Customize the background color to match your design.
+  ::-moz-selection {
+      background: $selected-background-color;
+      text-shadow: none;
+  }
+
+  ::selection {
+      background: $selected-background-color;
+      text-shadow: none;
+  }
+
+  // A better looking default horizontal rule
+  hr {
+      display: block;
+      height: 1px;
+      border: 0;
+      border-top: 1px solid $hr-color;
+      margin: 1em 0;
+      padding: 0;
+  }
+
+  // Remove the gap between audio, canvas, iframes,
+  // images, videos and the bottom of their containers:
+  // https://github.com/h5bp/html5-boilerplate/issues/440
+  audio,
+  canvas,
+  iframe,
+  img,
+  svg,
+  video {
+      vertical-align: middle;
+  }
+
+  // Remove default fieldset styles.
+  fieldset {
+      border: 0;
+      margin: 0;
+      padding: 0;
+  }
+
+  // Allow only vertical resizing of textareas.
+  textarea {
+      resize: vertical;
+  }
+}

lib/h5bp/_media.scss

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+// Print styles
+// Inlined to avoid the additional HTTP request:
+// http://www.phpied.com/delay-loading-your-print-css/
+@mixin h5bp-media {
+  @media print {
+    @include h5bp-media-print;
+  }
+}
+
+@mixin h5bp-media-print {
+    @media print {
+        *,
+        *:before,
+        *:after {
+            background: transparent !important;
+            color: #000 !important; // Black prints faster:
+                                    // http://www.sanbeiji.com/archives/953
+            box-shadow: none !important;
+            text-shadow: none !important;
+        }
+
+        a,
+        a:visited {
+            text-decoration: underline;
+        }
+
+        a[href]:after {
+            content: " (" attr(href) ")";
+        }
+
+        abbr[title]:after {
+            content: " (" attr(title) ")";
+        }
+
+        // Don't show links that are fragment identifiers,
+        // or use the `javascript:` pseudo protocol
+        a[href^="#"]:after,
+        a[href^="javascript:"]:after {
+            content: "";
+        }
+
+        pre,
+        blockquote {
+            border: 1px solid #999;
+            page-break-inside: avoid;
+        }
+
+        // Printing Tables:
+        // http://css-discuss.incutio.com/wiki/Printing_Tables
+
+        thead {
+            display: table-header-group;
+        }
+
+        tr,
+        img {
+            page-break-inside: avoid;
+        }
+
+        img {
+            max-width: 100% !important;
+        }
+
+        p,
+        h2,
+        h3 {
+            orphans: 3;
+            widows: 3;
+        }
+
+        h2,
+        h3 {
+            page-break-after: avoid;
+        }
+    }
+}

lib/h5bp/_normalize.scss

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+// normalize.css v3.0.2 | MIT License | git.io/normalize
+@mixin h5bp-normalize {
+  @include normalize-base;
+  @include normalize-display;
+  @include normalize-links;
+  @include normalize-semantics;
+  @include normalize-embedded;
+  @include normalize-grouping;
+  @include normalize-forms;
+  @include normalize-tables;
+}
+
+// Base
+@mixin normalize-base {
+  // 1. Set default font family to sans-serif.
+  // 2. Prevent iOS text size adjust after orientation change, without
+  //    disabling user zoom.
+  html {
+    font-family: sans-serif;  // 1
+    -ms-text-size-adjust: 100%; // 2
+    -webkit-text-size-adjust: 100%; // 2
+  }
+  // Remove default margin.
+  body {
+    margin: 0;
+  }
+
+}
+
+// HTML5 display definitions
+@mixin normalize-display {
+  // Correct `block` display not defined for any HTML5 element in IE 8/9.
+  // Correct `block` display not defined for `details` or `summary` in IE 10/11
+  // and Firefox.
+  // Correct `block` display not defined for `main` in IE 11.
+  article,
+  aside,
+  details,
+  figcaption,
+  figure,
+  footer,
+  header,
+  hgroup,
+  main,
+  menu,
+  nav,
+  section,
+  summary {
+    display: block;
+  }
+
+  // 1. Correct `inline-block` display not defined in IE 8/9.
+  // 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+  audio,
+  canvas,
+  progress,
+  video {
+    display: inline-block; // 1
+    vertical-align: baseline; // 2
+  }
+
+  // Prevent modern browsers from displaying `audio` without controls.
+  // Remove excess height in iOS 5 devices.
+  audio:not([controls]) {
+    display: none;
+    height: 0;
+  }
+
+  // Address `[hidden]` styling not present in IE 8/9/10.
+  // Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
+  [hidden],
+  template {
+    display: none;
+  }
+}
+
+// Links
+@mixin normalize-links {
+  // Remove the gray background color from active links in IE 10.
+  a {
+    background-color: transparent;
+  }
+
+  // Improve readability when focused and also mouse hovered in all browsers.
+  a:active,
+  a:hover {
+    outline: 0;
+  }
+}
+
+// Text-level semantics
+@mixin normalize-semantics {
+  // Address styling not present in IE 8/9/10/11, Safari, and Chrome.
+  abbr[title] {
+    border-bottom: 1px dotted;
+  }
+
+  // Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+  b,
+  strong {
+    font-weight: bold;
+  }
+
+  // Address styling not present in Safari and Chrome.
+  dfn {
+    font-style: italic;
+  }
+
+  // Address variable `h1` font-size and margin within `section` and `article`
+  // contexts in Firefox 4+, Safari, and Chrome.
+  h1 {
+    font-size: 2em;
+    margin: 0.67em 0;
+  }
+
+  // Address styling not present in IE 8/9.
+  mark {
+    background: #ff0;
+    color: #000;
+  }
+
+  // Address inconsistent and variable font size in all browsers.
+  small {
+    font-size: 80%;
+  }
+
+  // Prevent `sub` and `sup` affecting `line-height` in all browsers.
+  sub,
+  sup {
+    font-size: 75%;
+    line-height: 0;
+    position: relative;
+    vertical-align: baseline;
+  }
+
+  sup {
+    top: -0.5em;
+  }
+
+  sub {
+    bottom: -0.25em;
+  }
+}
+
+// Embedded content
+@mixin normalize-embedded {
+  // Remove border when inside `a` element in IE 8/9/10.
+  img {
+    border: 0;
+  }
+
+  // Correct overflow not hidden in IE 9/10/11.
+  svg:not(:root) {
+    overflow: hidden;
+  }
+}
+
+// Grouping content
+@mixin normalize-grouping {
+  // Address margin not present in IE 8/9 and Safari.
+  figure {
+    margin: 1em 40px;
+  }
+
+  // Address differences between Firefox and other browsers.
+  hr {
+    -moz-box-sizing: content-box;
+    box-sizing: content-box;
+    height: 0;
+  }
+
+  // Contain overflow in all browsers.
+  pre {
+    overflow: auto;
+  }
+
+  // Address odd `em`-unit font size rendering in all browsers.
+  code,
+  kbd,
+  pre,
+  samp {
+    font-family: monospace, monospace;
+    font-size: 1em;
+  }
+}
+
+// Forms
+@mixin normalize-forms {
+  // Known limitation: by default, Chrome and Safari on OS X allow very limited
+  // styling of `select`, unless a `border` property is set.
+  // 1. Correct color not being inherited.
+  //    Known issue: affects color of disabled elements.
+  // 2. Correct font properties not being inherited.
+  // 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+  button,
+  input,
+  optgroup,
+  select,
+  textarea {
+    color: inherit; // 1
+    font: inherit; // 2
+    margin: 0; // 3
+  }
+
+  // Address `overflow` set to `hidden` in IE 8/9/10/11.
+  button {
+    overflow: visible;
+  }
+
+  // Address inconsistent `text-transform` inheritance for `button` and `select`.
+  // All other form control elements do not inherit `text-transform` values.
+  // Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
+  // Correct `select` style inheritance in Firefox.
+  button,
+  select {
+    text-transform: none;
+  }
+
+  // 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+  // and `video` controls.
+  // 2. Correct inability to style clickable `input` types in iOS.
+  // 3. Improve usability and consistency of cursor style between image-type
+  // `input` and others.
+  button,
+  html input[type="button"], // 1
+  input[type="reset"],
+  input[type="submit"] {
+    -webkit-appearance: button; // 2
+    cursor: pointer; // 3
+  }
+
+  // Re-set default cursor for disabled elements.
+  button[disabled],
+  html input[disabled] {
+    cursor: default;
+  }
+
+  // Remove inner padding and border in Firefox 4+.
+  button::-moz-focus-inner,
+  input::-moz-focus-inner {
+    border: 0;
+    padding: 0;
+  }
+
+  // Address Firefox 4+ setting `line-height` on `input` using `!important` in
+  // the UA stylesheet.
+  input {
+    line-height: normal;
+  }
+
+  // It's recommended that you don't attempt to style these elements.
+  // Firefox's implementation doesn't respect box-sizing, padding, or width.
+  // 1. Address box sizing set to `content-box` in IE 8/9/10.
+  // 2. Remove excess padding in IE 8/9/10.
+  input[type="checkbox"],
+  input[type="radio"] {
+    box-sizing: border-box; // 1
+    padding: 0; // 2
+  }
+
+  // Fix the cursor style for Chrome's increment/decrement buttons. For certain
+  // `font-size` values of the `input`, it causes the cursor style of the
+  // decrement button to change from `default` to `text`.
+  input[type="number"]::-webkit-inner-spin-button,
+  input[type="number"]::-webkit-outer-spin-button {
+    height: auto;
+  }
+
+  // 1. Address `appearance` set to `searchfield` in Safari and Chrome.
+  // 2. Address `box-sizing` set to `border-box` in Safari and Chrome
+  // (include `-moz` to future-proof).
+  input[type="search"] {
+    -webkit-appearance: textfield; /* 1 */
+    -moz-box-sizing: content-box;
+    -webkit-box-sizing: content-box; /* 2 */
+    box-sizing: content-box;
+  }
+
+  // Remove inner padding and search cancel button in Safari and Chrome on OS X.
+  // Safari (but not Chrome) clips the cancel button when the search input has
+  // padding (and `textfield` appearance).
+  input[type="search"]::-webkit-search-cancel-button,
+  input[type="search"]::-webkit-search-decoration {
+    -webkit-appearance: none;
+  }
+
+  // Define consistent border, margin, and padding.
+  fieldset {
+    border: 1px solid #c0c0c0;
+    margin: 0 2px;
+    padding: 0.35em 0.625em 0.75em;
+  }
+
+  // 1. Correct `color` not being inherited in IE 8/9/10/11.
+  // 2. Remove padding so people aren't caught out if they zero out fieldsets.
+  legend {
+    border: 0; /* 1 */
+    padding: 0; /* 2 */
+  }
+
+  // Remove default vertical scrollbar in IE 8/9/10/11.
+  textarea {
+    overflow: auto;
+  }
+
+  // Don't inherit the `font-weight` (applied by a rule above).
+  // NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
+  optgroup {
+    font-weight: bold;
+  }
+}
+
+// Tables
+@mixin normalize-tables {
+  // Remove most spacing between table cells.
+  table {
+    border-collapse: collapse;
+    border-spacing: 0;
+  }
+
+  td,
+  th {
+    padding: 0;
+  }
+}