\
:root{ --brand:#0d6efd; }
body{ font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif; }
.bg-gradient{ background: radial-gradient(120% 120% at 10% 0%, #eef4ff, #fff); }
.navbar .nav-link.active{ color: var(--brand); font-weight: 600; }
.ratio > iframe{ border:0; }