width carousel Bootstrap - css

Question

I have a carousel with bootstrap, I want the width 100% on the title of the picture. I tried this, but it doesnt works .carousel-caption {
width : 500px;
}
<div id="myCarousel" class="carousel slide col-md-12" data-ride="carousel">
<ol class="carousel-indicators">
<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
<li data-target="#myCarousel" data-slide-to="1"></li>
<li data-target="#myCarousel" data-slide-to="2"></li>
<li data-target="#myCarousel" data-slide-to="3"></li>
<li data-target="#myCarousel" data-slide-to="4"></li>
</ol>
<!-- Wrapper for slides -->
<div id="divres" class="carousel-inner peopleCarouselImg" role="listbox">
<div class="item active">
<a href="resultado.php">
<div>
<img src="foto.png" alt="Chania">
<div class="carousel-caption">
<h1 class="img-rounded">EL MEJOR AUTO DEL MUNDO</h1>
</div>
</div>
</a>
</div>
</div>
<!-- Left and right controls -->
<a class="left carousel-control" href="#myCarousel" role="button" data-
slide="prev">
<span class="glyphicon glyphicon-chevron-left" aria-hidden="true"></span>
<span class="sr-only">Anterior</span>
</a>
<a class="right carousel-control" href="#myCarousel" role="button" data-
slide="next">
<span class="glyphicon glyphicon-chevron-right" aria-hidden="true"></span>
<span class="sr-only">Siguiente</span>
</a>
</div>
I want 100% width
The CSS
.carousel-caption {
background-color: black;
}

Answer 1

You need to set the width to 100% to cover full width.The margin-left is used to move towards left that the carousel's left navigation button is occupying.
.carousel-caption {
background-color: black;
width:100%;
margin-left:-15%;
}
#media screen and (min-width:768px){
.carousel-caption {
background-color: black;
width:100%;
margin-left:-20%;
}
}