*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family:'Poppins',sans-serif;
    background:
    linear-gradient(135deg,#0f172a,#1e293b,#0f172a);
    min-height:100vh;
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
    overflow-x:hidden;
}

/* EFECTOS */
.bg-circle{
    position:absolute;
    border-radius:50%;
    filter:blur(80px);
    opacity:.25;
}

.circle1{
    width:250px;
    height:250px;
    background:#2563eb;
    top:-80px;
    left:-80px;
}

.circle2{
    width:300px;
    height:300px;
    background:#0ea5e9;
    bottom:-120px;
    right:-120px;
}

/* TARJETA */
.card-qr{
    position:relative;
    z-index:2;
    width:100%;
    max-width:520px;
    background:rgba(255,255,255,0.08);
    backdrop-filter:blur(14px);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:30px;
    padding:40px;
    text-align:center;
    box-shadow:0 15px 45px rgba(0,0,0,.35);
}

/* LOGO */
.logo{
    width:70px;
    margin-bottom:20px;
    filter:drop-shadow(0 5px 10px rgba(0,0,0,.35));
}

/* TITULOS */
h1{
    color:#ffffff;
    font-size:32px;
    font-weight:700;
    margin-bottom:10px;
}

.subtitle{
    color:#cbd5e1;
    font-size:15px;
    line-height:1.7;
    margin-bottom:30px;
}

/* INPUT */
.form-control{
    height:58px;
    border-radius:16px;
    border:none;
    padding:15px 18px;
    font-size:16px;
    box-shadow:none !important;
}

.form-control:focus{
    border:none;
    box-shadow:0 0 0 4px rgba(37,99,235,.25) !important;
}

/* BOTON */
.btn-generate{
    width:100%;
    height:58px;
    border:none;
    border-radius:16px;
    background:linear-gradient(135deg,#2563eb,#0ea5e9);
    color:#fff;
    font-size:17px;
    font-weight:600;
    transition:.3s;
    margin-top:15px;
}

.btn-generate:hover{
    transform:translateY(-3px);
    box-shadow:0 10px 25px rgba(37,99,235,.35);
}

/* QR */
#qrcode{
    margin-top:35px;
    display:flex;
    justify-content:center;
}

#qrcode img{
    background:#fff;
    padding:15px;
    border-radius:20px;
    box-shadow:0 10px 25px rgba(0,0,0,.25);
    animation:fadeIn .4s ease;
}

/* DESCARGA */
.download-btn{
    display:none;
    margin-top:25px;
    border-radius:14px;
    padding:13px 25px;
    font-weight:600;
}

/* FOOTER */
.footer{
    margin-top:30px;
    color:#94a3b8;
    font-size:14px;
}

.footer span{
    color:#ffffff;
    font-weight:600;
}

/* ANIMACION */
@keyframes fadeIn{
    from{
        opacity:0;
        transform:scale(.8);
    }
    to{
        opacity:1;
        transform:scale(1);
    }
}

/* RESPONSIVE */
@media(max-width:576px){

    .card-qr{
        padding:30px 25px;
    }

    h1{
        font-size:26px;
    }

}