html, body{
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

h1{
    margin-top: 3rem;
}

#main-content{
    display: flex;
    flex-direction: column;
    height: 100%;
    background-color: #eee;
    align-items: center;
}

#login-tag{
    display: inline-block;
    display: flex;
    align-items: center;
    flex-direction: column;
    margin-top: 5rem;
    width: 20rem;
    height: 35rem;
    border-radius: 3rem;
    background-color: #fff;
}

#wxlogin-QR{
    margin-top: 1.5rem;
    height: 13rem;
    width: 13rem;
}

#login-button{
    border-radius: 2rem;
    margin-top: 2rem;
    padding: 0.7rem 1.2rem;
    color: white;
    font-size: 1.2rem;
    background-color: #55f;
}

#auto-signup-text{
    margin-top: 1rem;
}

span{
    text-align: center;
}

#qrcodeCanvas{
    width: 13rem;
    height: 13rem;
}