<form action="upload.php" method="POST">
  <input type="file" multiple>
  <p>Drag your files here or click in this area.</p>
  <button type="submit">Upload</button>
</form>
body{
  background: rgba(0,0,0,0.9);
}
form{
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -100px;
  margin-left: -250px;
  width: 500px;
  height: 200px;
  border: 4px dashed #fff;
}
form p{
  width: 100%;
  height: 100%;
  text-align: center;
  line-height: 170px;
  color: #ffffff;
  font-family: Arial;
}
form input{
  position: absolute;
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  outline: none;
  opacity: 0;
}
form button{
  margin: 0;
  color: #fff;
  background: #16a085;
  border: none;
  width: 508px;
  height: 35px;
  margin-top: -20px;
  margin-left: -4px;
  border-radius: 4px;
  border-bottom: 4px solid #117A60;
  transition: all .2s ease;
  outline: none;
}
form button:hover{
  background: #149174;
	color: #0C5645;
}
form button:active{
  border:0;
}



$(document).ready(function(){
  $('form input').change(function () {
    $('form p').text(this.files.length + " file(s) selected");
  });
});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. //cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js