:root {
    --portal-bg: #0f172a;
    --portal-card: rgba(255,255,255,.96);
}
body.portal-body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(13,110,253,.35), transparent 35%),
        radial-gradient(circle at bottom right, rgba(25,135,84,.28), transparent 35%),
        var(--portal-bg);
}
.portal-card {
    background: var(--portal-card);
    border: 0;
    border-radius: 1.5rem;
    box-shadow: 0 1rem 3rem rgba(0,0,0,.25);
}
.brand-badge {
    width: 54px;
    height: 54px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, #0d6efd, #20c997);
    color: #fff;
    font-weight: 800;
}
.admin-shell {
    background: #f5f7fb;
    min-height: 100vh;
}
.admin-card {
    border: 0;
    border-radius: 1rem;
    box-shadow: 0 .5rem 1.5rem rgba(15,23,42,.08);
}
.table thead th {
    font-size: .8rem;
    text-transform: uppercase;
    color: #64748b;
}
.qr-box {
    max-width: 420px;
    margin: 0 auto;
}
@media (max-width: 576px) {
    .portal-card { border-radius: 1rem; }
    .display-6 { font-size: 1.55rem; }
}