body{
    margin:0;
    font-family:Arial,sans-serif;
    background:#0b1f3a;
    color:white;
}

.dashboard{
    display:flex;
    justify-content:center;
    padding:40px 20px;
}

.card{
    width:100%;
    max-width:850px;
    background:#0b1f3a;
    border-radius:18px;
    padding:30px;
    box-shadow:0 0 30px rgba(0,0,0,0.35);
}

.pay-header{
    text-align:center;
    margin-bottom:30px;
}

.btc-badge{
    width:70px;
    height:70px;
    background:linear-gradient(135deg,#ffb300,#ff7b00);
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    margin:auto;
    font-size:30px;
    color:white;
    margin-bottom:15px;
    box-shadow:0 8px 20px rgba(255,165,0,0.4);
}

.pay-header h2{
    margin:0;
    font-size:28px;
}

.pay-subtitle{
    margin-top:10px;
    color:#b7c9e6;
    line-height:1.5;
}

.payment-banner{
    margin-top:25px;
    background:#13294b;
    padding:18px;
    border-radius:12px;
    text-align:center;
    margin-bottom:25px;
}

.banner-item strong{
    font-size:24px;
    color:#00e1ff;
}

.conversion-area{
    margin-top:25px;
}

#usd-input{
    width:100%;
    padding:16px;
    border-radius:10px;
    border:none;
    outline:none;
    font-size:18px;
    background:#122846;
    color:white;
    box-sizing:border-box;
}

#usd-input::placeholder{
    color:#8ca7c7;
}

.conversion-result{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:15px;
    margin-top:20px;
}

.convert-card{
    background:#13294b;
    border-radius:12px;
    padding:18px;
    min-height:110px;

    display:flex;
    flex-direction:column;
    justify-content:center;
}

.convert-card span{
    display:block;
    color:#9eb4d1;
    margin-bottom:8px;
}

.convert-card strong{
    font-size:22px;
    color:#00e1ff;
}

.summary-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:15px;
    margin-top:30px;
    align-items:stretch;
}

.summary-card{
    background:#13294b;
    padding:18px;
    border-radius:12px;
    min-height:50px;

    display:flex;
    flex-direction:column;
    justify-content:center;
}

.summary-card .label{
    color:#9eb4d1;
    font-size:14px;
    margin-bottom:8px;
}

.summary-card .value{
    font-size:20px;
    font-weight:bold;
}

.summary-card.highlight{
    
    background:#0b1f3a;
}

.summary-card.highlight .label,
.summary-card.highlight .value{
    color:white;
}

.actions{
    display:flex;
    gap:15px;
    margin-top:30px;
    flex-wrap:wrap;
}

.actions button{
    flex:1;
    min-width:180px;
    padding:15px;
    border:none;
    border-radius:10px;
    font-size:16px;
    cursor:pointer;
    transition:0.3s ease;
}

.primary{
    background:linear-gradient(135deg,#00aaff,#0066ff);
    color:white;
    font-weight:bold;
}

.primary:hover{
    opacity:0.9;
    transform:translateY(-2px);
}

.secondary{
    background:#1b2f4e;
    color:white;
}

.secondary:hover{
    background:#2a4771;
}

.primary.loading{
    opacity:0.7;
    cursor:not-allowed;
}

.notice-box{
    margin-top:30px;
    background:rgba(255,255,255,0.05);
    border-left:4px solid #00d9ff;
    padding:18px;
    border-radius:10px;
}

.notice-box p{
    margin:0 0 10px;
    line-height:1.6;
    color:#d4e4ff;
}

.notice-box small{
    color:#9eb4d1;
}

@media(max-width:768px){

    .card{
        padding:20px;
    }

    .pay-header h2{
        font-size:24px;
    }

    .banner-item strong{
        font-size:20px;
    }

    .convert-card strong,
    .summary-card .value{
        font-size:18px;
    }
}