.my-custom-block {
  width: 100%;
  overflow-x: auto; 
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-x;
  padding: 10px; 
  box-sizing: border-box;
}

/* iframe */
#kp-widget {
  width: 1300px;          
  max-width: 100%;       
  height: 600px;

  display: block;
  margin: 0 auto;        
  border: none;
  border-radius: 20px;
  background: transparent;
}