body{
    margin: 0%;
    padding: 0%;
    background-color:hsl(212, 45%, 89%) ;
}
.container {
  background-color:  #fff;
  height: 450px;
  width: 300px;
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
  margin: auto;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}
.container{
  display: flex;
  justify-content: center;
  flex-direction: column;
  
}
.sub-container {
  height: 60%;
  width: 90%;
  margin: 10px auto;
  border-radius: 10px;
  background-image: url(image-qr-code.png);
  background-size: cover;
  background-position: center;
  justify-content: center;
}
h3 {
  font-size: 25px;
  text-align: center;
  
}
p {
  font-size: 15px;
  text-align: center;
  color: hsl(216, 15%, 48%);
  margin-bottom: 30px;  
}


@media (max-width: 600px) {
  .sub-container {
    width: 90%;
    height: 300px; /* or auto */
    margin: 20px auto;
    background-size: cover;
    background-repeat: no-repeat;
    
}

  .text-container h3 {
    font-size:25px;
    text-align: center;
  }

  .container {
    flex-direction: column;
    align-items: center;
  }
  p {
    margin-bottom:40px
  }
}