Q:

Div hidden (under) bootstrap navbar

I use bootstrap 3 to design my website. I defined a navbar-fixed-top.
I needed to define a div fixed top superposed on the navbar for a search form.
I used z-index (=16777271 to be sure) to put the search div over the navbar.
It works well on my Firefox browser (with any width) but when i try it on my phone, the search div doesn't appear. 
Here are some parts of my code : 
NavBar :
<div class="navbar-default navbar-fixed-top" role="navigation">
    <div class="navbar-header">
        <button type="button" class="navbar-toggle pull-right" data-toggle="collapse" data-target="#navbar-rt-collapse">
            <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="/toto/"><img src="/toto/img/logo.png" alt="toto" style="max-width:120px; margin-top: -15px;" /></a>

    </div>
    <div class="navbar-collapse collapse navbar-right" id="navbar-rt-collapse">
      <ul class="nav navbar-nav">
                        <li><a href="/favorites"><i class="fa fa-history"></i></a></li>
            <li><a href="/login"><i class="fa fa-user"></i></a></li>

      </ul>
    </div>

HTML for search div : 
                                                                        <div class="fixed-search">
<input name="query" value="" id="query" class="form-control" placeholder="Find ..." autocomplete="on" maxlength="255" type="text"/>

CSS for search div :
.fixed-search {
  position: fixed;
  z-index:16777271 !important;
  top: 8px;
  height: 35px;

}

.fixed-search-btn {
  position: fixed;
  z-index:16777270 !important;
  top: 8px;
  height: 35px;

}

I search for a solution on Google but I didn't find any discussion about this problem.
If someone have a solution to solve this problem or can explain from where it come, I am very interested. 
Thank you, Best regards,
Raphael

A:

I found a way to do what I wanted. I defined the problem differently : I want to put the search query in the fixed navbar, out of the sidebar. So my real question was : Can i put an input out of the form ? The answer is Yes. You can define the  properties of your input equal to the form id. That's all and it works very well.
Thanks for help anyway ! 

