body{
    font-family: Arial, sans-serif;
    background:#f2f2f2;
    text-align:center;
    margin:0;
    padding:0;
}

h1{
    margin-top:30px;
    color:#0b4d91;
}

.cards{
    display:flex;
    justify-content:center;
    gap:20px;
    margin-top:40px;
    flex-wrap:wrap;
}

.card{
    background:#fff;
    padding:25px;
    width:300px;
    border-radius:12px;
    box-shadow:0 2px 10px rgba(0,0,0,0.15);
}

.card h2{
    margin-bottom:15px;
}

button,
.btn{
    background:#0b6;
    color:#fff;
    border:none;
    padding:12px 20px;
    border-radius:8px;
    cursor:pointer;
    text-decoration:none;
    display:inline-block;
    margin-top:10px;
}

button:hover,
.btn:hover{
    opacity:0.9;
}

.popup-bg{
    display:none;
    position:fixed;
    top:0;
    left:0;
    width:100%;
    height:100%;
    background:rgba(0,0,0,0.6);
    justify-content:center;
    align-items:center;
    z-index:9999;
}

.popup{
    background:#fff;
    width:400px;
    max-width:90%;
    padding:25px;
    border-radius:12px;
    position:relative;
    box-shadow:0 4px 20px rgba(0,0,0,0.3);
}

.popup h3{
    margin-top:0;
}

.popup input,
.popup textarea{
    width:100%;
    padding:12px;
    margin:10px 0;
    border:1px solid #ddd;
    border-radius:8px;
    box-sizing:border-box;
}

.popup textarea{
    resize:none;
}

.close{
    position:absolute;
    right:15px;
    top:10px;
    font-size:28px;
    cursor:pointer;
    font-weight:bold;
}

.qr-image{
    width:250px;
    max-width:100%;
    display:block;
    margin:15px auto;
}

.payment-buttons{
    display:flex;
    justify-content:center;
    gap:10px;
    flex-wrap:wrap;
    margin-top:15px;
}

.gpay-btn{
    background:#4285F4;
    color:white;
    padding:10px 15px;
    border-radius:8px;
    text-decoration:none;
}

.phonepe-btn{
    background:#5F259F;
    color:white;
    padding:10px 15px;
    border-radius:8px;
    text-decoration:none;
}

.paytm-btn{
    background:#00BAF2;
    color:white;
    padding:10px 15px;
    border-radius:8px;
    text-decoration:none;
}

@media(max-width:768px){

    .cards{
        flex-direction:column;
        align-items:center;
    }

    .card{
        width:90%;
    }

    .popup{
        width:95%;
    }

    .payment-buttons{
        flex-direction:column;
    }
}