Overlap an element over another element - html

Question

I'm trying to make such a stuff
But somehow I got something like the one below(Please ignore the color, font family for now)
My code is here.
HTML:
<div class="box">
<p>Instagram Photo</p>
</div>
<hr>
CSS:
.box{
background-color:red;
width:60%;
margin-left:20%;
height:30px;
z-index:3;
position:static;
}
.box p{
text-align:center;
color:white;
line-height:30px;
}
hr {
border-top: 1px solid red;
border-bottom: 1px solid blue;
z-index:-1;
margin-top:-15px;
position:static;
}

Answer 1

Change position: static to position: relative for the box.
CSS-Tricks reference
z-index only effects elements that have a position value other than
static (the default).
.box {
background-color: red;
width: 60%;
margin-left: 20%;
height: 30px;
z-index: 3;
position: relative;
}
.box p {
text-align: center;
color: white;
line-height: 30px;
}
hr {
border-top: 1px solid red;
border-bottom: 1px solid blue;
z-index: -1;
margin-top: -15px;
position: static;
}
<div class="box">
<p>Instagram Photo</p>
</div>
<hr>

Answer 2

I tried to make it exactly like the image you put.
Whenever you want to put an HTML element above or beneath another element, use the z-index property. The more the value of the z-index, it will be more on the above, and vice versa
.box{
background-color: #F8931F;
position: absolute;
width: 200px;
text-align: center;
color: #fff;
padding: 5px;
text-transform: uppercase;
left: 50%;
top: 40px;
transform: translate(-50%,0);
}
.seperator{
width: 100%;
height: 2px;
position: absolute;
background-color: #F8931F;
top: 52px;
z-index: -1;
}
<div class="box">instagram photos</div>
<div class="seperator"></div>

Answer 3

One suggestion is to use :after for the border.
.box{
height:30px;
z-index:3;
position:static;
}
.box p{
background-color:red;
text-align:center;
color:white;
line-height:30px;
margin: 0;
margin-left:20%;
width:60%;
}
.box:after{
border-top: 1px solid red;
border-bottom: 1px solid blue;
content: '';
display: block;
z-index:-1;
top:-15px;
position: relative;
width: 100%;
height: 0px;
}
<div class="box">
<p>Instagram Photo</p>
</div>
http://jsfiddle.net/afelixj/nrEfm/50/