*{
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
}

body{
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: rebeccapurple;
}

.container{
   width: 400px;
   height: 250px;
    background-color:  #fff;
    border-radius: 7px;
    padding: 20px;
    transition: .1s;
}


.header h1{
    font-size:25px;
    font-weight: 500;
    margin-bottom: 5px;
}

.header p{
    font-size: 16px;
    margin-bottom: 10px;
}

input, button{
    width: 100%;
    height: 50px;
    outline: none;
    border-radius: 5px;
}

button{
    border: none;
    font-size: 15px;
    cursor: pointer;
    color: #fff;
    background-color: #1d68d8;
}

input{
    border: 1px solid #8b8a8a;
    margin-bottom: 15px;
    font-size: 15px;
    padding-left: 10px;
}

.qr-code{
    padding: 25px 0;
    border: 1px solid #ccc;
    margin-top: 10px;
    opacity: 0;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 4px;
    transition: .5s;
}

.container.active{
    height: 490px;
}

.container.active .qr-code{
    opacity: 1;
    pointer-events: auto;
}