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</section>



<section id="alerts">
  <div class="page-header">
    <h1>Alerts &amp; Errors <small>Styles for success, warning, and error messages or alerts</small></h1>
  </div>
  <div class="row">
    <div class="span4 columns">
      <h2>Basic alerts</h2>
      <p>One-line messages for highlighting the failure, possible failure, or success of an action. Particularly useful for forms.</p>
    </div>
    <div class="span12 columns">
      <div class="alert-message error">
        <a class="close" href="#">&times;</a>
        <p><strong>Oh snap!</strong> Change this and that and try again.</p>
      </div>
      <div class="alert-message warning">
        <a class="close" href="#">&times;</a>
        <p><strong>Holy gaucamole!</strong> Best check yo self, you're not looking too good.</p>
      </div>
      <div class="alert-message success">
        <a class="close" href="#">&times;</a>
        <p><strong>Well done!</strong> You successfully read this alert message.</p>
      </div>
      <div class="alert-message info">
        <a class="close" href="#">&times;</a>
        <p><strong>Heads up!</strong> This is an alert that needs your attention, but it's not a huge priority just yet.</p>
      </div>
    </div>
  </div>
  <div class="row">
    <div class="span4 columns">
      <h2>Block messages</h2>
      <p>For messages that require a bit of explanation, we have paragraph style alerts. These are perfect for bubbling up longer error messages, warning a user of a pending action, or just presenting information for more emphasis on the page.</p>
    </div>
    <div class="span12 columns">
      <div class="alert-message block-message error">
        <a class="close" href="#">&times;</a>
        <p><strong>Oh snap! You got an error!</strong> Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.</p>
        <p><a class="btn small" href="#">Take This Action</a> <a class="btn small" href="#">Or Do This</a></p>
      </div>
      <div class="alert-message block-message warning">
        <a class="close" href="#">&times;</a>
        <p><strong>Holy gaucamole! This is a warning!</strong> Best check yo self, you're not looking too good. Nulla vitae elit libero, a pharetra augue. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.</p>
        <p><a class="btn small" href="#">Take This Action</a> <a class="btn small" href="#">Or Do This</a></p>
      </div>
      <div class="alert-message block-message success">
        <a class="close" href="#">&times;</a>
        <p><strong>Well done!</strong> You successfully read this alert message. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Maecenas faucibus mollis interdum.</p>
        <p><a class="btn small" href="#">Take This Action</a> <a class="btn small" href="#">Or Do This</a></p>
      </div>
      <div class="alert-message block-message info">
        <a class="close" href="#">&times;</a>
        <p><strong>Heads up!</strong> This is an alert that needs your attention, but it's not a huge priority just yet.</p>
        <p><a class="btn small" href="#">Take This Action</a> <a class="btn small" href="#">Or Do This</a></p>
      </div>
    </div>
  </div>
</section>


<section id="modals">
  <div class="page-header">
    <h1>Modals <small>Rules and conditions for displaying content in dialog boxes</small></h1>
  </div>
  <div class="row">
    <div class="span4 columns">
      <h2>Example modal</h2>
      <p>Modals&mdash;dialogs or lightboxes&mdash;are great for contextual actions in situations where it's important that the background context be maintained.</p>
    </div>
    <div class="span12 columns">
      <div class="well" style="background-color: rgba(0,0,0,0.5); border: none; padding: 40px;">
        <div class="modal" style="position: relative; top: auto; left: auto; margin: 0 auto; z-index: 1">
          <div class="modal-header">
            <h3>Add new Tweet</h3>
            <a href="#" class="close">&times;</a>
          </div>
          <div class="modal-body">
            <p>One fine body...</p>
          </div>
          <div class="modal-footer">
            <a href="" class="btn primary">Primary</a>
            <a href="" class="btn secondary">Secondary</a>
          </div>
        </div>
      </div>
    </div>
  </div>
</section>



<section id="preboot">
<div class="page-header">
  <h1>Using Bootstrap with LESS <small>Supercharge your CSS with variables, mixins, and functions</small></h1>
</div>
<div class="row">
  <div class="span4 columns">
    <p><a href="http://markdotto.com/bootstrap/">Preboot</a> is a super awesome pack of mixins and variables to be used in conjunction with <a href="http://lesscss.org" target="_blank">LESS</a>, a CSS preprocessor for faster and easier web development, that we used to build Bootstrap.</p>
  </div>
  <div class="span12 columns">
    <h2>How to use it</h2>
    <p>Use this option to make full use of Bootstrap's LESS variables, mixins, and nesting in CSS via javascript in your browser.</p>
    <pre class="html">
&lt;link rel="stylesheet/less" type="text/css" href="less/bootstrap.less" media="all" /&gt;
&lt;script type="text/javascript" src="js/less-1.0.41.min.js"&gt;&lt;/script&gt;</pre>
<p>Not feeling the .js solution? <a href="http://incident57.com/less" target="_blank">Try the LESS Mac app</a> or <a href="http://lesscss.org/#-client-side-usage" target="_blank">use Node.js</a> to compile when you deploy your code.</p>

    <h2>What's included</h2>
    <p>Here are some of the highlights of what's included in Twitter Bootstrap as part of Bootstrap. Head over to the Bootstrap website or Github project page to download and learn more.</p>
    <h3>Color variables</h3>
    <p>Variables in LESS are perfect for maintaining and updating your CSS headache free. When you want to change a color value or a frequently used value, update it in one spot and you're set.</p>
    <pre class="css">
// Links
@linkColor:         #8b59c2;
@linkColorHover:    darken(@linkColor, 10);

// Grays
@black:             #000;
@grayDark:          lighten(@black, 25%);
@gray:              lighten(@black, 50%);
@grayLight:         lighten(@black, 70%);
@grayLighter:       lighten(@black, 90%);
@white:             #fff;

// Accent Colors
@blue:              #08b5fb;
@green:             #46a546;
@red:               #9d261d;
@yellow:            #ffc40d;
@orange:            #f89406;
@pink:              #c3325f;
@purple:            #7a43b6;

// Baseline
@baseline:          20px;
</pre>

<h3>Commenting</h3>
<p>LESS also provides another style of commenting in addition to CSS's normal <code>/* ... */</code> syntax.</p>
<pre class="css">
// This is a comment
/* This is also a comment */
</pre>

<h3>Mixins up the wazoo</h3>
<p>Mixins are basically includes or partials for CSS, allowing you to combine a block of code into one. They're great for vendor prefixed properties like <code>box-shadow</code>, cross-browser gradients, font stacks, and more. Below is a sample of the mixins that are included with Bootstrap.</p>
<h4>Font stacks</h4>
<pre class="css">
#font {
  .shorthand(@weight: normal, @size: 14px, @lineHeight: 20px) {
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
  .sans-serif(@weight: normal, @size: 14px, @lineHeight: 20px) {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
  .serif(@weight: normal, @size: 14px, @lineHeight: 20px) {
    font-family: "Georgia", Times New Roman, Times, sans-serif;
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
  .monospace(@weight: normal, @size: 12px, @lineHeight: 20px) {
    font-family: "Monaco", Courier New, monospace;
    font-size: @size;
    font-weight: @weight;
    line-height: @lineHeight;
  }
}
</pre>
<h4>Gradients</h4>
<pre class="css">
#gradient {
  .horizontal (@startColor: #555, @endColor: #333) {
    background-color: @endColor;
    background-repeat: repeat-x;
    background-image: -khtml-gradient(linear, left top, right top, from(@startColor), to(@endColor)); // Konqueror
    background-image: -moz-linear-gradient(left, @startColor, @endColor); // FF 3.6+
    background-image: -ms-linear-gradient(left, @startColor, @endColor); // IE10
    background-image: -webkit-gradient(linear, left top, right top, color-stop(0%, @startColor), color-stop(100%, @endColor)); // Safari 4+, Chrome 2+
    background-image: -webkit-linear-gradient(left, @startColor, @endColor); // Safari 5.1+, Chrome 10+
    background-image: -o-linear-gradient(left, @startColor, @endColor); // Opera 11.10
    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",@startColor,@endColor)); /* IE6 & IE7 */
    -ms-filter: %("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)",@startColor,@endColor); /* IE8+ */
    background-image: linear-gradient(left, @startColor, @endColor); // Le standard
  }
  .vertical (@startColor: #555, @endColor: #333) {
    background-color: @endColor;
    background-repeat: repeat-x;
    background-image: -khtml-gradient(linear, left top, left bottom, from(@startColor), to(@endColor)); /* Konqueror */
    background-image: -moz-linear-gradient(@startColor, @endColor); /* FF 3.6+ */
    background-image: -ms-linear-gradient(@startColor, @endColor); /* IE10 */
    background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%, @startColor), color-stop(100%, @endColor)); /* Safari 4+, Chrome 2+ */
    background-image: -webkit-linear-gradient(@startColor, @endColor); /* Safari 5.1+, Chrome 10+ */
    background-image: -o-linear-gradient(@startColor, @endColor); /* Opera 11.10 */
    filter: e(%("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",@startColor,@endColor)); /* IE6 & IE7 */
    -ms-filter: %("progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)",@startColor,@endColor); /* IE8+ */
    background-image: linear-gradient(@startColor, @endColor); /* the standard */
  }
  .directional (@startColor: #555, @endColor: #333, @deg: 45deg) {
    ...
  }
  .vertical-three-colors(@startColor: #00b3ee, @midColor: #7a43b6, @colorStop: 0.5, @endColor: #c3325f) {
    ...
  }
}
</pre>

<h3>Operations and grid system</h3>
<p>Get fancy and perform some match to generate flexible and powerful mixins like the one below.</p>
<pre class="css">
// Griditude
@gridColumns:       16;
@gridColumnWidth:   40px;
@gridGutterWidth:   20px;

// Grid System
.container {
  width: @siteWidth;
  margin: 0 auto;
  .clearfix();
}
.columns(@columnSpan: 1) {
  display: inline;
  float: left;
  width: (@gridColumnWidth * @columnSpan) + (@gridGutterWidth * (@columnSpan - 1));
  margin-left: @gridGutterWidth;
  &:first-child {
    margin-left: 0;
  }
}
.offset(@columnOffset: 1) {
  margin-left: (@gridColumnWidth * @columnOffset) + (@gridGutterWidth * (@columnOffset - 1)) !important;
}
</pre>
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            Open-sourced under the <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License v2.0</a>.
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