body {
	margin: 0;
	padding: 0;                                                      
}
.demo_wrapper {
	width: 100%;
	margin: 0 auto 20px auto;
    display: table; 
}
@media only screen and (max-device-width: 800px), screen and (max-width: 800px) {
  .demo_wrapper {
    width: 100%;
  }
}
.demo_block {
	width: 100%;
}