How to make Oblique lines with CSS / Bootstrap 3 - html

Question

How can I make a page like this with slanted lines?
Can I put an angle of 20 degrees for example? I have to put 3 div?
For now I put a first div to put a logo in the middle, then I put the navigation bar and I would like the navigation bar to be aligned with the angle just above the oblique line.
I have to work on bootstrap 3
I'm a bit lost. thank you very much for your help and explanations
<div class="container" style="background-color: #04342E; width:100%">
<img class="img-responsive center-block" style="height: 600px; align-items: center;"; src="/i/gp-logo.png" />
<nav class="navbar navbar-default" style="justify-content: space-between; background-color: transparent; background: transparent; border-color: transparent;">
<ul class="nav navbar-nav" style="text-decoration: none">
<li class="nav-item">
<a class="nav-link active" href="#" style="color: white;">Accueil</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Tableaux</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Papeterie</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Book</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">A propos</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Contact</a>
</li>
</ul>
</nav>
<div>
</div>
</div>

Answer 1

Either you can create div with clip-path I would recommand to use: https://bennettfeely.com/clippy/
Either you use background with linear-gradient.
DEMO with clip-path:
body{
background: #04342E;
margin:0;
}
div.polygon{
height: 100vh;
width: 100vw;
background: white;
clip-path: polygon(0 25%, 100% 0, 100% 100%, 0 75%);
display:flex;
}
.content{
height: 50%;
width: 100%;
background-color:rgba(255,0,0,0.3); /** Just used to show the written area But it should be removed **/
margin:auto;
}
<div class="polygon">
<div class="content">
Lorem ipsum
</div>
</div>

Answer 2

.container {
background-color: #04342E;
width: 100%;
height: 500px;
position: relative;
}
.container::after {
position: absolute;
content: "";
left: 0px;
right: 0px;
bottom: 0px;
border-bottom: solid white 500px;
transform-origin: bottom right;
transform: skew(1000deg);
}
.container #content {
background-color: #04342E;
width: 100%;
height: 500px;
margin-top: 600px;
position: relative;
}
.container #content::after {
position: absolute;
content: "";
top: 0px;
right: 0px;
left: 0px;
border-top: solid white 500px;
transform-origin: top left;
transform: skew(-1000deg);
}
<div class="container">
<img class="img-responsive center-block" style="height: 100px; align-items: center;" ; src="./images/image 5.png" />
<nav class="navbar navbar-default" style="justify-content: space-between; background-color: transparent; background: transparent; border-color: transparent;">
<ul class="nav navbar-nav" style="text-decoration: none">
<li class="nav-item">
<a class="nav-link active" href="#" style="color: white;">Accueil</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Tableaux</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Papeterie</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Book</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">A propos</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#" style="color: white;">Contact</a>
</li>
</ul>
</nav>
<div id="content">
</div>
</div>
you can use psuedo classes in css to create this. see above for the code.