.chart-wrap { height: 300px; position: relative; margin-top: 0.75rem; }
#oa-map { height: 380px; border-radius: 8px; }
.explainer {
    margin-top: 1rem;
    padding: 1rem;
    font-size: 0.9rem;
    border-left: 3px solid #38bdf8;
    background: rgba(56, 189, 248, 0.08);
}
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 1.5rem; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }