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

body{
    background:#f4f6fb;
    display:flex;
    justify-content:center;
    align-items:center;
    min-height:100vh;
}

.background{
    position:fixed;
    inset:0;
    z-index:-1;
    background:
    radial-gradient(circle at 18% 18%,rgba(160,255,165,.65),transparent 22%),
    radial-gradient(circle at 72% 25%,rgba(255,247,145,.55),transparent 22%),
    radial-gradient(circle at 28% 75%,rgba(181,255,255,.55),transparent 25%),
    radial-gradient(circle at 78% 70%,rgba(255,205,232,.45),transparent 22%),
    #f8f9fc;
    filter:blur(18px);
}


.btc-card{
    width:400px;
    background:#fff;
    border-radius:4px;
    padding:30px;
    box-shadow:0 10px 30px rgba(0,0,0,.08);
    text-align:center;
    /* margin-top:0px; */
}

.btc-image{
    width:200px;
    height:200px;
    object-fit:contain;
    margin-bottom:20px;
}

.payment-price{
    margin-bottom:22px;
    text-align:center;
}

.payment-price span{
    display:block;
    font-size:15px;
    color:#6b7280;
    margin-bottom:8px;
    text-transform:uppercase;
    letter-spacing:0.08em;
}

.payment-price h2{
    font-size:30px;
    font-weight:700;
    color:#111827;
    line-height:1.1;
}

.payment-price small{
    display:block;
    margin-top:8px;
    font-size:10px;
    color:#9ca3af;
}

.btc-card h3{
    font-size:30px;
    margin-bottom:20px;
    color:#222;
}

.address-box{
    display:flex;
    border:1px solid #ddd;
    border-radius:4px;
    overflow:hidden;
}

.address-box input{
    flex:1;
    border:none;
    outline:none;
    padding:20px;
    font-size:15px;
    color:#444;
    background:#fafafa;
}

.address-box button{
    border:none;
    background:#7066E0;
    color:#fff;
    padding:0 20px;
    cursor:pointer;
    font-weight:600;
    transition:.3s;
}

.address-boxx input{
    flex:1;
    border:none;
    outline:none;
    padding:20px;
    font-size:20px;
    color:#fff;
    background:#7066E0;
    text-align:center;
}
.address-boxx button{
    border:none;
    background:#7066E0;
    color:#fff;
    padding:0 20px;
    cursor:pointer;
    font-weight:600;
    transition:.3s;
}

.address-boxx{
    display:flex;
    border:1px solid #ddd;
    /* border-radius:4px; */
    overflow:hidden;
}

.proof-payment{
    margin-top:30px;
}

.proof-payment h3{
    font-size:22px;
    color:#222;
    margin-bottom:8px;
}

.proof-text{
    color:#777;
    margin-bottom:20px;
    font-size:15px;
}

.upload-card{
    border:2px dashed #d9d9d9;
    /* border-radius:18px; */
    padding:35px 20px;
    text-align:center;
    background:#fafafa;
    transition:.3s;
}


.upload-icon{
    font-size:45px;
    margin-bottom:15px;
}

.upload-card h4{
    margin-bottom:8px;
    color:#222;
}

.upload-card p{
    color:#888;
    font-size:20px;
    margin-bottom:20px;
}

.upload-btn{
    display:inline-block;
    background:#7066E0;
    color:#fff;
    padding:12px 28px;
    /* border-radius:4px; */
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}



#file-name{
    display:block;
    margin-top:18px;
    color:#666;
    font-size:20px;
}

.upload-preview{
    margin:18px auto 14px;
    min-height:120px;
    display:flex;
    justify-content:center;
    align-items:center;
    border:1px dashed #d0d7e2;
    /* border-radius:14px; */
    background:#fff;
    overflow:hidden;
}

.upload-placeholder{
    font-size:38px;
    color:#7066E0;
}

.preview-image{
    width:100%;
    max-height:180px;
    object-fit:contain;
}

.preview-placeholder{
    font-size:16px;
    color:#7066E0;
    font-weight:600;
}

.confirm-payment{
    width:100%;
    margin-top:25px;
    padding:15px;
    border:none;
    /* border-radius:4px; */
    /* background:#33353a; */
    background:#7066E0;
    color:#fff;
    font-size: 15px;
    font-weight:600;
    cursor:pointer;
    transition:.3s;
}

.payment-error{
    display:none;
    margin-top:18px;
    padding:10px 12px;
    background:#fee2e2;
    color:#b91c1c;
    border:1px solid #fecaca;
    font-size:14px;
}

.payment-error.show{
    display:block;
}

.success-modal{
    position:fixed;
    inset:0;
    background:rgba(17, 24, 39, 0.55);
    display:flex;
    justify-content:center;
    align-items:center;
    padding:20px;
    z-index:1000;
    opacity:0;
    pointer-events:none;
    transition:0.3s ease;
}

.success-modal.show{
    opacity:1;
    pointer-events:auto;
}

.success-modal-content{
    background:#fff;
    width:min(100%, 360px);
    padding:28px 24px;
    text-align:center;
    box-shadow:0 12px 35px rgba(0,0,0,0.18);
}

.success-modal-content h3{
    margin-bottom:10px;
    font-size:24px;
    color:#111827;
}

.success-modal-content p{
    color:#6b7280;
    margin-bottom:18px;
    line-height:1.5;
}

.success-modal-btn{
    border:none;
    background:#7066E0;
    color:#fff;
    padding:12px 20px;
    font-weight:600;
    cursor:pointer;
}

/* .confirm-payment:hover{
    background:#000;
} */