how to use z-index in overlay and text - css

Question

i want to use z-index for text and overlay.
https://jsfiddle.net/osm2rkbx/1/
it is my code.
.mainArea {
background: url('https://c.wallhere.com/photos/94/68/1920x1000_px_landscape_photography_reflections_river-1002111.jpg!d');
height: 50vh;
width: 100vw;
position: relative;
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
.mainArea p {
display: flex;
height: 50vh;
font-size: 1.5rem;
font-weight: 800;
display: flex;
align-items: center;
justify-content: center;
color: #fff;
text-shadow: 2px 2px 4px #000000;
z-index: 999999 !important;
}
.mainAreaOverlay {
position: absolute;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.9);
top: 0;
left: 0;
z-index: 1;
}
<div class="mainArea">
<div class="container">
<div class="col-md-12 text-center ">
<p>its the text..</p>
</div>
</div>
<div class="mainAreaOverlay"></div>
</div>
when i use z-index for text, its not working. It seems pale. How can i see text with white. İf you help me i will be glad, thanks.

Answer 1

Put z-index:-1 in mainArea class and update z-index:-1 to mainAreaOverlay class.
Old mainArea class:
.mainArea {
background: url('https://c.wallhere.com/photos/94/68/1920x1000_px_landscape_photography_reflections_river-1002111.jpg!d');
height: 50vh;
width: 100vw;
position: relative;
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
}
Updated:
.mainArea {
background: url('https://c.wallhere.com/photos/94/68/1920x1000_px_landscape_photography_reflections_river-1002111.jpg!d');
height: 50vh;
width: 100vw;
position: relative;
background-attachment: fixed;
background-position: center;
background-repeat: no-repeat;
background-size: cover;
z-index:-1;
}
Old mainAreaOverlay class:
.mainAreaOverlay {
position: absolute;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.9);
top: 0;
left: 0;
z-index: 1;
}
Updated:
.mainAreaOverlay {
position: absolute;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.8);
top: 0;
left: 0;
z-index: -1;
}