index.css

*{
    margin: 0;
    padding:0;
    box-sizing: border-box;
}
html,body{
    width:100%;
    height:100%;
    background-color: rgb(40, 40, 40);
    font-family: 'Poppins',sans-serif;
}
#container{
    max-width: 400px;
    margin:100px auto 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    background-color: white;
    align-items: left;
    padding: 34px;
    border-radius: 10px;
}
#data{
    color: black;

}
.head{
    font-size: 16px;

}
#input-data{
    width: 300px;
    height: 36px;
    border-radius: 6px;
    border: 1.5px solid grey;
    outline-style: none;
    padding-left: 6px;
    font-size: 10px;
}
#button{
    width: 300px;
    height: 36px;
    border-radius: 6px;
    background-color: rgb(83, 83, 234);
    color: white;
    border: none;
}
.error{
    animation: shake 0.1s linear 10;
}
#qr{
    align-items: center;
    padding-left: 70px;
}
@keyframes shake{
    0%{
        transform: translateX(0);
    }
    25%{
        transform: translateX(-2px);
    }
    50%{
        transform: translateX(0);
    }
    75%{
        transform: translateX(2px);
    }
    100%{
        transform: translateX(0);
    }
}