style.css

*{
    margin: 0;padding: 0;
    box-sizing: border-box;
}
body{
    background: #F2F2F7;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}
.box1{
    border: 1px solid #63a1ff;
    box-shadow: 0 0 20px 0 #608cce;
    /* width: 300px;
    height: 400px; */
    padding: 20px;
    background: #E5E5EA;
    border-radius: 20px;
}
#qr-text{
    display: block;
    font-size: 24px;
    padding: 5px;
    margin-top: 10px;
    border-radius: 10px;
    border: 1px solid rgb(216, 207, 207);
    width: 100%;
}
#qr-btn{
    border: none;
    padding: 12px;
    margin-top: 10px;
    font-size: 1.0rem;
    border-radius: 30px;
    color: #4c9bf5;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background: #C3D5ED;
    width: 60%;
    margin-bottom: 10px;
    margin-left: 20%;
    cursor: pointer;
}
#qr-img{
    width: 100%;
    margin: auto;
    display: block;
}
h2{
    text-align: center;
    margin-bottom:auto ;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}
@media  screen and (max-width: 370px){
   body{
    background: #F2F2F7;
   } 
}