CSS: working with box borders

Question

I'm trying to replicate the white box on this page, Where it says "your success".

body{
  background-color:#DFDFDF;
  }
.index_whitebox{
  background-color: #fff;
  height: 60%;
  width: 25%;
  position: absolute;
  margin-left: 4%;
  margin-bottom: 20px;
  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
  border-radius: 10px;
}

<div class="index_whitebox">
  </div>

I assume there's no border-style and I use % for mobile compatibility. I can't seem to get the border right.

Answer 1

If you look in 'inspect element' you can actually see how they've coded it. I bunched together the main bits they use, as some used a CSS file and others were inline.

.class1 {
    left: 1px;
    width: 302px;
    position: absolute;
    top: 445px;
    height: 378px;
}

.class2 {
    left: 1px;
    width: 302px;
    position: absolute;
    top: 445px;
    height: 378px;
}

.class3{
    border: 2px solid rgba(255, 255, 255, 1);
    background-color: rgba(255, 255, 255, 1);
    border-radius: 5px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.6);
}

It's all in here: