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

body{
    background:#f5f5f5;
    min-height:100vh;
}

.screen{
    width:100%;
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
}

.hidden{
    display:none;
}

.card{
    width:100%;
    max-width:450px;
    background:#fff;
    border-radius:15px;
    padding:25px;
    box-shadow:0 5px 15px rgba(0,0,0,.15);
}

.card h1,
.card h2{
    text-align:center;
    margin-bottom:20px;
    color:#222;
}

input,
select{
    width:100%;
    padding:14px;
    margin-bottom:15px;
    border:1px solid #ccc;
    border-radius:10px;
    font-size:16px;
}

button{
    width:100%;
    padding:14px;
    border:none;
    border-radius:10px;
    margin-bottom:10px;
    cursor:pointer;
    font-size:16px;
    font-weight:bold;
    background:#0d6efd;
    color:white;
    transition:.2s;
}

button:hover{
    transform:scale(1.02);
}

.header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    background:#0d6efd;
    color:white;
    text-align:center;
    padding:15px;
    z-index:100;
    box-shadow:0 2px 8px rgba(0,0,0,.2);
}

.header h2{
    margin-bottom:5px;
}

.menu{
    width:100%;
    max-width:450px;
    margin-top:120px;
}

.menu button{
    margin-bottom:15px;
    height:65px;
    font-size:18px;
}

#qrcode{
    display:flex;
    justify-content:center;
    margin:20px 0;
}

#folioGenerado{
    text-align:center;
    font-size:18px;
    font-weight:bold;
    margin-top:10px;
    margin-bottom:20px;
    color:#198754;
}

@media(max-width:600px){

    .card{
        padding:20px;
    }

    button{
        font-size:15px;
    }

}