.demo_header{
  align-items: center;
  margin-top: 20px;
  position: relative;
}
.back_button{
  width: 200px;
  height: 40px;
  font-size: 32px;
  position: absolute;
  left: 0;
  top:30px;
  text-align: left;
  z-index: 2;
  background-color: #fff;
  color: #272c34;
}
.demo_title{
  height: 100px;
  width: 100%;
  align-items: center;
  font-size: 32px;
  font-weight: 500;
  justify-content: center;
}