How can I correctly add a shadow and a gradient to my triangular shape?

Question

I want to make the following design:

I tried with :after and :before but it does not work. Here’s my current code:

Answer 1

If you change your CSS to the following minor changes, then you can achieve the result that you have expected:

.design {
  background: #ea053a;
  display: inline-block;
  height: 100px;
  margin-left: 33px;
  margin-right: 40px;
  position: relative;
  width: 180px;
}

.design:before {
  border-top: 43px solid #ea053a;
  border-left: 90px solid transparent;
  border-right: 90px solid transparent;
  margin-right: 40px;
  content: "";
  height: 0;
  left: 0;
  position: absolute;
  top: 0px;
  margin-top: 100px;
  width: 0;
}

Here is the working of the above CSS:

.design {
  background: #ea053a;
  display: inline-block;
  height: 100px;
  margin-left: 33px;
  margin-right: 40px;
  position: relative;
  width: 180px;
}

.design:before {
  border-top: 43px solid #ea053a;
  border-left: 90px solid transparent;
  border-right: 90px solid transparent;
  margin-right: 40px;
  content: "";
  height: 0;
  left: 0;
  position: absolute;
  top: 0px;
  margin-top: 100px;
  width: 0;
}

Hope this was helpful.

My Fiddle