Why is the button floating in the navbar?

Question

css

In the navbar, a button floats when the screen is reduced (in fact, it is needed for this).
Screen:

Code:

<nav class="navbar navbar-static-top navbar-inverse" role="navigation">
        
          <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbarCollapse">
              <span class="sr-only">Toggle navigation</span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="#">Chat Example</a>
          </div>
          <!--nav-collapse -->
          <div id="navbarCollapse" class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
              <li><a target="_blank" href="https://github.com/yarkovaleksei/AppChat">View on GitHub</a></li>
            </ul>
          </div>
          <!--/.nav-collapse -->
        
      </nav>

Answer 1

Floats due to the width: 100% of the button described in chat.css

Answer 2

Try it.

position: absolute;
    float: right;
    margin-right: 15px;
    padding: 9px 10px;
    margin-top: 13px;
    margin-bottom: 13px;
    background-color: transparent;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 0;
}

Answer 3

.navbar-toggle {margin-right: 15px}
toggles 15 pixels to the left just
remove it
for normal padding set parent padding
.navbar-header{padding: 15px}