Responsive half diamond border bottom CSS [closed] - css

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How do you achieve this kind thing on the bottom of a div in CSS? Is it possible?
Currently I use an image solution but I think it's not a good way.
Thanks!
For those questioning, I did research, and this is the thing I tried and it looked ugly.
width: 100%;
border-left: 800px solid transparent;
border-right: 800px solid transparent;
border-top: 84px solid #15C4CB;
It will look like this:
Not even centered or responsive.

Answer 1

The ideea is to use vw units instead of regular px; 50vw means half the viewport. This way you will always have them scaled related to your viewport;
#someid{
position: absolute;
left: 0;
top: 0;
width: 100%;
height: 50px;
background: #15C4CB;
text-align: center;
}
#someid::before{
content: "";
display: block;
position: absolute;
top: 100%;
width: 100%;
border-left: 50vw solid transparent;
border-right: 50vw solid transparent;
border-top: 80px solid #15C4CB;
box-sizing: border-box;
}
<div id="someid"> Bla bla bla </div>

Answer 2

you could give a try to pseudo, rotate and box shadow:
p {
/* or any other wrapper, here = demo purpose , so is width */
width: 50%;
margin: 1em auto;
padding-bottom: 3%;
/* == 3% width */
position: relative;
overflow: hidden;
}
p:before,
p:after {
content: '';
position: absolute;
z-index: -1;
width: 100.2%;
height: 100%;
top: 100%;
}
p:before {
left: -50%;
transform-origin: top right;
transform: rotate(5deg);
box-shadow: -1000px -1000px 0 1000px #00C4CC;
}
p:after {
right: -50%;
box-shadow: 1000px -1000px 0 1000px #00C4CC;/* adapt here values to average max-height your containers could be (safe value) */
transform-origin: top left;
transform: rotate(-5deg);
}
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