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

body{
    background:#0b0c10;
    color:#fff;
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:30px;
}

.container{
    width:100%;
    max-width:950px;
}

.payment-card{
    background:#1f2833;
    border-radius:20px;
    overflow:hidden;
    border:1px solid rgba(102,252,241,.15);
    box-shadow:0 0 40px rgba(102,252,241,.08);
}

.header{
    background:linear-gradient(135deg,#45a29e,#66fcf1);
    color:#000;
    text-align:center;
    padding:45px 30px;
}

.header h1{
    font-size:2rem;
    margin-bottom:10px;
}

.header p{
    font-size:1rem;
    font-weight:500;
}

.content{
    padding:40px;
}

.grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
}

.input-group{
    display:flex;
    flex-direction:column;
}

.input-group label{
    margin-bottom:8px;
    color:#c5c6c7;
}

.input-group input,
.input-group select,
.input-group textarea{
    background:#0b0c10;
    border:1px solid #2d3748;
    color:#fff;
    padding:14px;
    border-radius:12px;
    outline:none;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus{
    border-color:#66fcf1;
}

.full{
    grid-column:1 / -1;
}

.summary{
    margin-top:30px;
    background:#0b0c10;
    padding:25px;
    border-radius:15px;
    border:1px solid rgba(102,252,241,.15);
}

.summary h3{
    color:#66fcf1;
    margin-bottom:15px;
}

.summary ul{
    list-style:none;
}

.summary ul li{
    margin-bottom:10px;
    color:#c5c6c7;
}

.payment-methods{
    display:flex;
    flex-wrap:wrap;
    gap:15px;
    margin-top:20px;
}

.method{
    flex:1;
    min-width:120px;
    text-align:center;
    padding:15px;
    border-radius:10px;
    background:#1f2833;
    border:1px solid rgba(102,252,241,.15);
    font-weight:500;
}

.pay-btn{
    width:100%;
    margin-top:30px;
    padding:18px;
    border:none;
    border-radius:12px;
    background:#66fcf1;
    color:#000;
    font-size:1rem;
    font-weight:700;
    cursor:pointer;
    transition:.3s;
}

.pay-btn:hover{
    transform:translateY(-3px);
    box-shadow:0 10px 25px rgba(102,252,241,.3);
}

.secure{
    text-align:center;
    margin-top:15px;
    color:#9ca3af;
}

.footer{
    text-align:center;
    padding:20px;
    border-top:1px solid rgba(255,255,255,.08);
    color:#8b949e;
    font-size:.9rem;
}

@media(max-width:768px){

    .grid{
        grid-template-columns:1fr;
    }

    .content{
        padding:25px;
    }

    .header h1{
        font-size:1.6rem;
    }

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