*{
    margin: 0px;
    padding: 0px;
}
body{
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #3598DB;
    font-family: 'Roboto', sans-serif;
}
.container{
    width: 400px;
    text-align: center;
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 10px;
}
h2{
    margin-bottom: 0.5rem;
    margin-top: 1rem;
}
.container span{
    color: rgb(34, 33, 33);
}
#error{
    padding: 20px 20px;
    display: none;
    text-align: center;
    border-radius: 10px;
    margin-top: 1rem;
}
#input-text{
    width: 200px;
    height: 40px;
    border-radius: 5px;
    margin: 1rem 0rem;
    border: 2px solid #9B9B9B;
    font-size: 1rem;
    padding: 0px 10px;
}
#input-text:focus{
    outline: 1px #9B9B9B;
}
#generate-btn{
    width: 200px;
    font-size: 1.3rem;
    padding: 0.9rem 1.5rem;
    border-radius: 5px;
    background-color: #3598DB;
    border: none;
    color: #fff;
    cursor: pointer;    
}
.qr-code-img{
    opacity: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    
    border-radius: 5px;
    padding: 20px 0px;
}
#qr-img{
    width: 175px;
    border: 1px solid #9B9B9B;
    padding: 30px 30px;
    border-radius: 5px;
}
.container.active{
    height: 100vh;
}
.container.active .qr-code-img{
    opacity: 1;
}
#download-btn{
    display: none;
    text-decoration: none;
    background-color: #3598DB;
    color: #fff;
    padding: 15px 20px;
    font-size: 1.3rem;
    border-radius: 5px;
    width: 200px;
    margin: auto;
    margin-top: 1rem;
}