Full page responsive background of nested divs - css

Question

I made a BG made of CSS clipping in several divs (nested in .background) how do I configure the whole thing to be responsive? When I set width or height to 100% the background does not render at all.
body,
html {
margin: 0px;
}
.bg0 {
position: relative;
width: 1366px;
height: 675px;
background-color: #3B3B3B;
background-repeat: no-repeat;
background-size: cover;
background-position: center;
}
.bg1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #333333;
background-repeat: no-repeat;
background-size: cover;
-webkit-clip-path: polygon(0 0, 80% 0, 35% 50%, 0 12%);
clip-path: polygon(0 0, 80% 0, 35% 50%, 0 12%);
}
.bg2 {
position: absolute;
left: 0;
bottom: 0;
width: 100%;
height: 100%;
background-color: #2D2D2D;
background-repeat: no-repeat;
background-size: cover;
-webkit-clip-path: polygon(0 12%, 0 86%, 35% 50%);
clip-path: polygon(0 12%, 0 86%, 35% 50%);
}
#wrapper {
position: relative;
width: 200px;
height: 200px;
}
.content {
position: relative;
}
.background {
position: absolute;
}
<div id="wrapper">
<div class="background">
<div class="bg0"></div>
<div class="bg1"></div>
<div class="bg2"></div>
</div>
<div class="content">
<h1>Content!!</h1>
</div>
</div>

Answer 1

First....Why are you using fixed width to the bg0 class and also you are giving width to bg0 class grater than its parent element #wrapper...
I don think it's required...Just set the width and height of .background class
Stack Snippet
body,
html {
margin: 0px;
}
.bg0 {
position: relative;
width: 100%;
height: 100%;
background-color: #3B3B3B;
background-repeat: no-repeat;
background-size: cover;
background-position: center;
}
.bg1 {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #333333;
background-repeat: no-repeat;
background-size: cover;
-webkit-clip-path: polygon(0 0, 80% 0, 35% 50%, 0 12%);
clip-path: polygon(0 0, 80% 0, 35% 50%, 0 12%);
}
.bg2 {
position: absolute;
left: 0;
bottom: 0;
width: 100%;
height: 100%;
background-color: #2D2D2D;
background-repeat: no-repeat;
background-size: cover;
-webkit-clip-path: polygon(0 12%, 0 86%, 35% 50%);
clip-path: polygon(0 12%, 0 86%, 35% 50%);
}
#wrapper {
position: relative;
width: 200px;
height: 200px;
}
.content {
position: relative;
}
.background {
position: absolute;
top:0;
left:0;
width:100%;
height:100%;
}
<div id="wrapper">
<div class="background">
<div class="bg0"></div>
<div class="bg1"></div>
<div class="bg2"></div>
</div>
<div class="content">
<h1>Content!!</h1>
</div>
</div>