/* Optional styling for the ROI calculator */
.card { border-radius:12px; padding:20px; box-shadow:0 10px 25px rgba(0,0,0,0.1); background:#fff; }
.calculate-btn { background:#00266d; color:#fff; padding:12px 20px; border:none; border-radius:8px; cursor:pointer; }
.calculate-btn:hover { background:#003a9e; }
.results-section { background:#18998b; color:#fff; padding:20px; border-radius:12px; margin-top:20px; }