@import url('https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100;0,300;0,400;0,500;0,700;0,900;1,100;1,300;1,400;1,500;1,700; 1.900&display=swap');

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

body{
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #34db7a;
}

.container{
    background-color: #fff;
    height: 260px;
    width: 400px;
    border-radius: 10px;
    padding: 20px;
    transition: 0.2s;
}

.container.active{
    height: 500px;
}

#qr-header{
    text-align: center;
}

#qr-header h1{
    font-size: 1.8rem;
    margin-bottom: 10px;

}

#qr-header p{
    color: #444;
    font-size: 0.9rem;
}

#qr-form{
    margin: 20px 15px;
}

#qr-form input, #qr-form button{
    width: 100%;
    height: 50px;
    border: none;
    border-radius: 5px;
    font-size: 0.9rem;
}

#qr-form input{
    border: 1px solid #777;
    padding: 10px 15px;
}

#qr-form button{
    background-color: #086824;
    border: 1px solid #086824;
    color: #fff;
    font-size: 1.2rem;
    margin-top: 20px;
    cursor: pointer;
    transition: 400ms;
}

#qr-form button:hover, #qr-form button:active{
    border: 1px solid #086824;
    background-color: #fff;
    color: #086824;
    font-weight: 600;
    transition: 400ms;
}

#qr-form button:active{
    font-size: 1.1rem;
}

#qr-code{
    display: flex;
    opacity: 0;
    border: 1p solid #ccc;
    padding: 30px 0;
    margin: 20px 15px;
    display: flex;
    justify-content: center;
    border-radius: 5px;
    transition: 0.2s;
}

.container.active #qr-code{
    opacity: 1;
}