Overleaf/services/web/public/bootstrap/docs/scaffolding.html

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      <header class="jumbotron subhead" id="overview">
        <h1>Scaffolding</h1>
        <p class="lead">Bootstrap is built on a responsive 12-column grid. We've also included fixed- and fluid-width layouts based on that system.</p>
        <div class="subnav">
          <ul class="nav nav-pills">
            <li><a href="#grid-system">Grid system</a></li>
            <li><a href="#layouts">Layouts</a></li>
            <li><a href="#responsive">Responsive design</a></li>
          </ul>
        </div>
      </header>



<!-- Grid system
================================================== -->
<section id="grid-system">
  <div class="page-header">
    <h1>Grid system <small>12 columns with a responsive twist</small></h1>
  </div>

  <h2>Default grid</h2>
  <div class="row show-grid">
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
    <div class="span1">1</div>
  </div>
  <div class="row show-grid">
    <div class="span4">4</div>
    <div class="span4">4</div>
    <div class="span4">4</div>
  </div>
  <div class="row show-grid">
    <div class="span4">4</div>
    <div class="span8">8</div>
  </div>
  <div class="row show-grid">
    <div class="span6">6</div>
    <div class="span6">6</div>
  </div>
  <div class="row show-grid">
    <div class="span12">12</div>
  </div>
  <div class="row">
    <div class="span4">
      <p>The default grid system provided as part of Bootstrap is a <strong>940px-wide, 12-column grid</strong>.</p>
      <p>It also has four responsive variations for various devices and resolutions: phone, tablet portrait, table landscape and small desktops, and large widescreen desktops.</p>
    </div>
    <div class="span4">
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
  &lt;div class="span4"&gt;...&lt;/div&gt;
  &lt;div class="span8"&gt;...&lt;/div&gt;
&lt;/div&gt;
</pre>
    </div>
    <div class="span4">
      <p>As shown here, a basic layout can be created with two "columns," each spanning a number of the 12 foundational columns we defined as part of our grid system.</p>
    </div>
  </div><!-- /row -->

  <br>

  <h2>Offsetting columns</h2>
  <div class="row show-grid">
    <div class="span4">4</div>
    <div class="span4 offset4">4 offset 4</div>
  </div><!-- /row -->
  <div class="row show-grid">
    <div class="span3 offset3">3 offset 3</div>
    <div class="span3 offset3">3 offset 3</div>
  </div><!-- /row -->
  <div class="row show-grid">
    <div class="span8 offset4">8 offset 4</div>
  </div><!-- /row -->
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
  &lt;div class="span4"&gt;...&lt;/div&gt;
  &lt;div class="span4 offset4"&gt;...&lt;/div&gt;
&lt;/div&gt;
</pre>

  <br>

  <h2>Nesting columns</h2>
  <div class="row">
    <div class="span6">
      <p>With the static (non-fluid) grid system in Bootstrap, nesting is easy. To nest your content, just add a new <code>.row</code> and set of <code>.span*</code> columns within an existing <code>.span*</code> column.</p>
      <h4>Example</h4>
      <div class="row show-grid">
        <div class="span6">
          Level 1 of column
          <div class="row show-grid">
            <div class="span3">
              Level 2
            </div>
            <div class="span3">
              Level 2
            </div>
          </div>
        </div>
      </div>
    </div>
    <div class="span6">
<pre class="prettyprint linenums">
&lt;div class="row"&gt;
  &lt;div class="span12"&gt;
    Level 1 of column
    &lt;div class="row"&gt;
      &lt;div class="span6"&gt;Level 2&lt;/div&gt;
      &lt;div class="span6"&gt;Level 2&lt;/div&gt;
    &lt;/div&gt;
  &lt;/div&gt;
&lt;/div&gt;
</pre>
    </div>
  </div>

  <h2>Grid customization</h2>
  <table class="table table-bordered table-striped">
    <thead>
      <tr>
        <th>Variable</th>
        <th>Default value</th>
        <th>Description</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><code>@gridColumns</code></td>
        <td>12</td>
        <td>Number of columns</td>
      </tr>
      <tr>
        <td><code>@gridColumnWidth</code></td>
        <td>60px</td>
        <td>Width of each column</td>
      </tr>
      <tr>
        <td><code>@gridGutterWidth</code></td>
        <td>20px</td>
        <td>Negative space between columns</td>
      </tr>
      <tr>
        <td><code>@siteWidth</code></td>
        <td><em>Computed sum of all columns and gutters</em></td>
        <td>Counts number of columns and gutters to set width of the <code>.container-fixed()</code> mixin</td>
      </tr>
    </tbody>
  </table>
  <div class="row">
    <div class="span4">
      <h3>Variables in LESS</h3>
      <p>Built into Bootstrap are a handful of variables for customizing the default 940px grid system, documented above. All variables for the grid are stored in variables.less.</p>
    </div>
    <div class="span4">
      <h3>How to customize</h3>
      <p>Modifying the grid means changing the three <code>@grid*</code> variables and recompiling Bootstrap. Change the grid variables in variables.less and use one of the <a href="less.html#compiling">four ways documented to recompile</a>. If you're adding more columns, be sure to add the CSS for those in grid.less.</p>
    </div>
    <div class="span4">
      <h3>Staying responsive</h3>
      <p>Customization of the grid only works at the default level, the 940px grid. To maintain the responsive aspects of Bootstrap, you'll also have to customize the grids in responsive.less.</p>
    </div>
  </div><!-- /row -->

</section>



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================================================== -->
<section id="layouts">
  <div class="page-header">
    <h1>Layouts <small>Basic templates to create webpages</small></h1>
  </div>

  <div class="row">
    <div class="span6">
      <h2>Fixed layout</h2>
      <p>The default and simple 940px-wide, centered layout for just about any website or page provided by a single <code>&lt;div class="container"&gt;</code>.</p>
      <div class="minicon-layout">
        <div class="minicon-layout-body"></div>
      </div>
<pre class="prettyprint linenums">
&lt;body&gt;
  &lt;div class="container"&gt;
    ...
  &lt;/div&gt;
&lt;/body&gt;
</pre>
    </div><!-- /col -->
    <div class="span6">
      <h2>Fluid layout</h2>
      <p><code>&lt;div class="container-fluid"&gt;</code> gives flexible page structure, min- and max-widths, and a left-hand sidebar. It's great for apps and docs.</p>
      <div class="minicon-layout fluid">
        <div class="minicon-layout-sidebar"></div>
        <div class="minicon-layout-body"></div>
      </div>
<pre class="prettyprint linenums">
&lt;div class="container-fluid"&gt;
  &lt;div class="row-fluid"&gt;
    &lt;div class="span2"&gt;
      &lt;!--Sidebar content--&gt;
    &lt;/div&gt;
    &lt;div class="span10"&gt;
      &lt;!--Body content--&gt;
    &lt;/div&gt;
  &lt;/div&gt;
&lt;/div&gt;
</pre>
    </div><!-- /col -->
  </div><!-- /row -->
</section>




<!-- Responsive design
================================================== -->
<section id="responsive">
  <div class="page-header">
    <h1>Responsive design <small>Media queries for various devices and resolutions</small></h1>
  </div>
  <!-- Supported devices -->
  <div class="row">
    <div class="span4">
      <img src="assets/img/responsive-illustrations.png" alt="Responsive devices">
    </div>
    <div class="span8">
      <h2>Supported devices</h2>
      <p>Bootstrap supports a handful of media queries in a single file to help make your projects more appropriate on different devices and screen resolutions. Here's what's included:</p>
      <table class="table table-bordered table-striped">
        <thead>
          <tr>
            <th>Label</th>
            <th>Layout width</th>
            <th>Column width</th>
            <th>Gutter width</th>
          </tr>
        </thead>
        <tbody>
          <tr>
            <td>Smartphones</td>
            <td>480px and below</td>
            <td class="muted" colspan="2">Fluid columns, no fixed widths</td>
          </tr>
          <tr>
            <td>Portrait tablets</td>
            <td>480px to 768px</td>
            <td class="muted" colspan="2">Fluid columns, no fixed widths</td>
          </tr>
          <tr>
            <td>Landscape tablets</td>
            <td>768px to 980px</td>
            <td>42px</td>
            <td>20px</td>
          </tr>
          <tr>
            <td>Default</td>
            <td>980px and up</td>
            <td>60px</td>
            <td>20px</td>
          </tr>
          <tr>
            <td>Large display</td>
            <td>1210px and up</td>
            <td>70px</td>
            <td>30px</td>
          </tr>
        </tbody>
      </table>

      <h3>Requires meta tag</h3>
      <p>To ensure devices display responsive pages properly, include the viewport meta tag.</p>
      <pre class="prettyprint linenums">&lt;meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;</pre>

      <h3>What they do</h3>
      <p>Media queries allow for custom CSS based on a number of conditions&mdash;ratios, widths, display type, etc&mdash;but usually focuses around <code>min-width</code> and <code>max-width</code>.</p>
      <ul>
        <li>Modify the width of column in our grid</li>
        <li>Stack elements instead of float wherever necessary</li>
        <li>Resize headings and text to be more appropriate for devices</li>
      </ul>
    </div>
  </div>

  <br>

  <!-- Media query code -->
  <h2>Using the media queries</h2>
  <div class="row">
    <div class="span5">
      <p>Bootstrap doesn't automatically include these media queries, but understanding and adding them is very easy and requires minimal setup. You have a few options for including the responsive features of Bootstrap:</p>
      <ol>
        <li>Use the compiled responsive version, bootstrap-responsive.css</li>
        <li>Add @import "responsive.less" and recompile Bootstrap</li>
        <li>Modify and recompile responsive.less as a separate file</li>
      </ol>
      <p><strong>Why not just include it?</strong> Truth be told, not everything needs to be responsive. Instead of encouraging developers to remove this feature, we figure it best to enable it.</p>
    </div>
    <div class="span7">
<pre class="prettyprint linenums">
  // Landscape phones and down
  @media (max-width: 480px) { ... }

  // Landscape phone to portrait tablet
  @media (max-width: 768px) { ... }

  // Portrait tablet to landscape and desktop
  @media (min-width: 768px) and (max-width: 980px) { ... }

  // Large desktop
  @media (min-width: 1200px) { .. }
</pre>
    </div>
  </div>
</section>


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