body {
background: #0f172a;
color: #fff;
font-family: 'Segoe UI', sans-serif;
}

.card-dark {
background: #1e293b;
border-radius: 16px;
padding: 25px;
}

.btn-linkbio {
background: #2563eb;
color: #fff;
border-radius: 12px;
padding: 12px;
margin-top: 10px;
width: 100%;
}

.btn-linkbio:hover {
background: #1d4ed8;
}