Images overlap collapsed navbar - html

Question

I couldn't find anything like this on internet so I'm asking you guys! The problem is that my icons overlap my collapsed navbar.
My code:
<div class="container-fluid">
<div class="row">
<div class="">
<div id="black">
<nav class="navbar navbar-default navbar-inverse" role="navigation">
<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">
<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="img-responsive col-xs-4 col-sm-8 col-md-10 col-lg-12" href="#">
<img id="logo2" alt="Logo" class="" height="80%" width="73%" src="images/logo1.png">
</a>
</div>
<div class="container-fluid">
<div class="row">
<div class="">
<div id="black">
<nav class="navbar navbar-default navbar-inverse" role="navigation">
<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">
<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="img-responsive col-xs-4 col-sm-8 col-md-10 col-lg-12" href="#">
<img id="logo2" alt="Logo" class="" height="80%" width="73%" src="images/logo1.png">
</a>
</div>
<!-- Navbar contentas -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a class="visible-lg" href="#">Pagrindinis</a></li>
<li><a class="visible-lg" href="#">Kontaktai</a></li>
<li><a class="visible-lg" href="#">Apie mus</a></li>
<li><a class="visible-lg" href="#">Paslaugos</a></li>
<li></li>
<li class="dropdown">
Dropdown <span class="caret"></span>
<ul class="dropdown-menu" role="menu">
<li></li>
<li>Pagrindinis</li>
<li>Apie mus</li>
<li>Kontaktai</li>
<li>[phone]</li>
<li class="divider"></li>
<li>One more separated link</li>
</ul>
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li><p class="navbar-text" style="margin-left: 15px;" >Already have an account?</p></li>
<li class="dropdown">
<b>Login</b> <span class="caret"></span>
<ul id="login-dp" class="dropdown-menu">
<li>
<div class="row">
<div class="col-md-12">
Login via
<div class="social-buttons">
<i class="fa fa-facebook"></i> Facebook
<i class="fa fa-twitter"></i> Twitter
</div>
or
<form class="form" role="form" method="post" action="login" accept-charset="UTF-8" id="login-nav">
<div class="form-group">
<label class="sr-only" for="exampleInputEmail2">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail2" placeholder="Email address" required>
</div>
<div class="form-group">
<label class="sr-only" for="exampleInputPassword2">Password</label>
<input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password" required>
<div class="help-block text-right">Forget the password ?</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary btn-block">Sign in</button>
</div>
<div class="checkbox">
<label>
<input type="checkbox"> keep me logged-in
</label>
</div>
</form>
</div>
<div class="bottom text-center">
New here ? <b>Join Us</b>
</div>
</div>
</li>
</ul>
</li>
</ul>
</div><!-- /.navbar-collapse -->
</div><!-- /.container-fluid -->
</nav>
</div>
<div id="mint"></div>
<div class="" id="background1">
<div class="container-fluid">
<img class="img-responsive" id="logo1" src="images/logo1.png"/>
</div>
<div class="container-fluid">
<p id="p1" class="" >A great new free psd theme to showcase your<br>new application.</p>
</div>
<div id="sicons">
<img class="img-responsive col-xs-3 col-sm-3 col-md-4 col-lg-4" src="images/icon1.png"/>
<img class="img-responsive col-xs-3 col-sm-3 col-md-4 col-lg-4" style="margin-left: -15px; margin-right: -15px;" src="images/icon2.png"/>
<img class="img-responsive col-xs-3 col-sm-3 col-md-4 col-lg-4" src="images/icon3.png"/>
</div>
</div>
CSS:
body {
margin: 0px;
padding: 0px;
font-family: sans-serif;
}
#black {
height: 48px;
background-color: #282828;
}
/*------------NAVBAR DALYKAI-------------------------*/
#login-dp{
min-width: 250px;
padding: 14px 14px 0;
overflow:hidden;
background-color:rgba(255,255,255,.8);
}
#login-dp .help-block{
font-size:12px
}
#login-dp .bottom{
background-color:rgba(255,255,255,.8);
border-top:1px solid #ddd;
clear:both;
padding:14px;
}
#login-dp .social-buttons{
margin:12px 0
}
#login-dp .social-buttons a{
width: 49%;
}
#login-dp .form-group {
margin-bottom: 10px;
}
.btn-fb{
color: #fff;
background-color:#3b5998;
}
.btn-fb:hover{
color: #fff;
background-color:#496ebc
}
.btn-tw{
color: #fff;
background-color:#55acee;
}
.btn-tw:hover{
color: #fff;
background-color:#59b5fa;
}
#media(max-width:768px){
#login-dp{
background-color: inherit;
color: #fff;
}
#login-dp .bottom{
background-color: inherit;
border-top:0 none;
}
}
/*-------------------------------------------------------------------------------------------------------------------------*/
#mint {
height: 10px;
background-color: #2ecc71;
}
#background1
{
height: 600px;
background-image: url("images/background1.jpg");
background-repeat: no-repeat;
background-size:100%;
}
.p {
font-family: Myriad Pro;
}
#logo1 {
width: 10%;
margin-left: 20%;
margin-top: 11%;
}
#logo2 {
margin-top: 5%;
}
#p1 {
font-family: helvica-thin;
margin-left: 20%;
margin-top: 2%;
color: white;
font-size: 1.5vw;
}
#sicons {
position: absolute;
margin-left: 20%;
background-color: grey;
}
#sicons a:hover {
color: green;
}
#white {
height: 245px;
}
#icons {
position: absolute;
}
#iframe {
/*margin-top: 55px;
margin-left: 350px;*/
border-radius: 10px;
overflow: hidden;
max-width: 560px;
max-height: 315px;
}
#button {
border-radius: 0px 10px 10px 0px;
height: 56px;
width: 141px;
background-color: #2ecc71;
border: 0;
box-shadow:none;
color: white;
font-size: 24px;
}
#p2 {
position: absolute;
text-align: center;
}
#grey {
height: 427px;
background-color: #e3e3e3;
}
#white1 {
height: 468px;
}
#grey1 {
min-height: 130px;
background-color: #e3e3e3;
}

Answer 1

From looking at your code sample, it appears the culprit is #sicons having a value of position: absolute;. Items positioned absolutely will always sit on top of relatively position items. Try assigning your navbar and #sicons containers with z-index values, making #sicons's value lower than your navbar.
For more information about how z-index works, how it interacts with positioned elements, and the stacking order, check out the answer on this Stack Overflow question: "Understanding z-index stacking order"