Edit in JSFiddle

<div class="block">
  <div class="wrapper">
    <div class="content">
      content
    </div>
    <div class="form">
      <form action="">
        <input type="text">
        <input type="text">
        <input type="text">
      </form>
    </div>
  </div>
</div>
* { margin: 0; padding: 0; }
.block {
  background: url('http://uploads.webflow.com/580bda8bd2d6f3fd5766fe07/580bdabb018832030bfb7d5e_screen5-left-bg.png') 0 0 no-repeat;
  overflow-x: hidden;
}
.wrapper {
  width: 100%;
  max-width: 800px;
  margin: auto;
  display: flex;
  position: relative;
  z-index: 10;
  color: #fff;
  font-size: 50px;
}
.content {
  width: 50%;
  text-align: center;
  display: flex;
  align-items: center;
  align-content: center;
  justify-content: center;
}
.form {
  height: 360px;
  width: 50%;
  position: relative;
  display: flex;
  align-items: center;
}
.form:after {
  content: '';
  position: absolute;
  background: url('http://uploads.webflow.com/580bda8bd2d6f3fd5766fe07/580bdad5a6f74f8a0e208a0b_screen5-right-bg.jpg') 0 0 no-repeat;
  z-index: 5;
  width: 2000px;
  heigth: 100%;
  left: 0;
  top: 0;
  bottom: 0;
}
form {
  position: relative;
  z-index: 15;
  padding: 30px;
  background: rgba(0,0,0,.5);
}
input {
  width: 100%;
}