.present-value-calculator{font-family:Arial,sans-serif;text-align:center;margin:20px;padding:20px;border:1px solid #ccc;background-color:#f9f9f9;max-width:400px;margin:0 auto}.present-value-calculator label{font-weight:700;display:block;margin-top:10px}.present-value-calculator input[type=number]{width:100%;padding:8px;margin:5px 0;border:1px solid #ccc;border-radius:4px}#presentValueResult,#totalInterestResult{font-weight:700;font-size:18px;margin-top:15px}