.demo_wrapper {
	width: 80%;
	margin: 0 auto;
}
.row1{
width: 100%;
	margin: 0 auto;
}
@media only screen and (max-device-width: 768px), screen and (max-width: 768px) {
  .demo_wrapper {
    width: 100%;
  }  
  .row1 {width:100%;}
  .col12{width:100%;}
}
.demo_block {
	width: 100%;
}