style.css

	html,body{
        height: 100%;
        background:#EEEEEE;
      }
      .loader{
        display: none;
      }
   
.btn-upload {
	padding: 5px 30px;
	border-radius: 4px;
	margin-top: 20px;
	color: #fff;
	font-weight: 500;
	background-color: #0e1111;
	border: 1px solid;
}
.box {
  position: relative;
  background: #ffffff;
  width: 100%;
}
.box-header {
  color: #444;
  display: block;
  padding: 10px;
  position: relative;
  border-bottom: 1px solid #f4f4f4;
  margin-bottom: 10px;
}
.box-tools {
  position: absolute;
  right: 10px;
  top: 5px;
}
.dropzone-wrapper {
  border: 2px dashed #91b0b3;
  color: #92b0b3;
  position: relative;
  height: 150px;
}
.dropzone-desc {
  position: absolute;
  margin: 0 auto;
  left: 0;
  right: 0;
  text-align: center;
  width: 40%;
  top: 50px;
  font-size: 16px;
}
.dropzone,
.dropzone:focus {
  position: absolute;
  outline: none !important;
  width: 100%;
  height: 150px;
  cursor: pointer;
  opacity: 0;
}
.dropzone-wrapper:hover,
.dropzone-wrapper.dragover {
  background: #ecf0f5;
}
.preview-zone {
  text-align: center;
}
.preview-zone .box {
  box-shadow: none;
  border-radius: 0;
  margin-bottom: 0;
}