A responsive Transparent Nav within a background image

index.html

<nav class="navbar navbar-default">
    <div class="container-fluid">
      <!-- Brand and toggle get grouped for better mobile display -->
      <div class="navbar-header">
        <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
          <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="#">Brand</a>
      </div>

      <!-- Collect the nav links, forms, and other content for toggling -->
      <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
        <ul class="nav navbar-nav navbar-right">
          <li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>
          <li><a href="#">About</a></li>
          <li><a href="#">Services</a></li>
          <li><a href="#">Contact</a></li>
        </ul>
      </div><!-- /.navbar-collapse -->
    </div><!-- /.container-fluid -->
  </nav>

<div class="container-fluid">
  <div class="row mgn-top">
    <div class="col-md-12 backBG">
      <div class="col-md-6 center-block">
        <img class="img-responsive" src="/assets/clearchoice_logo2.png" alt="Clear Choice Window Cleaning">
      </div>
      <div class="col-sm-1 center-block">
        <button class="btn btn-lg"><a href="#"></a>Welcome</button>
      </div>
    </div>
  </div>
</div>

main.css.scss

$blue: #00adef;
$dark: #272727;
$orange: #ff9600;

.navbar{
  margin-top: 50px;
  margin-bottom: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  z-index: 1030;
}

.btn{
  background-color: $blue;
}


.center-block{
  float: none;
}

.mgn-top{
  margin-top:-100px;
}

.backBG{
  background-image: url('/assets/clrbg2.png');
  padding: 160px 60px;
  height: 1000px;
  position: relative;
  overflow: hidden;
  width: 100%;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}