#fk-calculator { font-family: Arial, sans-serif; max-width: 600px; margin: 20px; }
#fk-options div, #fk-options label { margin-bottom: 10px; display: block; }
#fk-total { margin-top: 20px; font-size: 1.2em; }

.fk-download-btn {margin-left: 8px; padding: 6px 18px; background: #ff0000; color: #fff; border-radius: 8px; text-decoration: none; font-weight: 600;}