.pfk-formula-item{background-color:#fff;border:1px solid #0056b3;border-radius:6px;padding:15px;box-shadow:0 2px 4px rgba(0,0,0,.1);cursor:pointer;transition:transform .2s ease-in-out,box-shadow .2s ease-in-out}.pfk-formula-item:hover{transform:translateY(-3px);box-shadow:0 4px 8px rgba(0,0,0,.15)}.pfk-formula-item h3{margin-top:0;margin-bottom:10px;color:#0056b3;font-size:18px}.pfk-formula-item .pfk-formula-display{font-size:1.3em;color:#333;margin-bottom:10px;padding:10px;background-color:#f0f8ff;border-radius:4px;text-align:center}.pfk-formula-item .pfk-formula-display sup,.pfk-formula-item .pfk-formula-display sub{line-height:0}.pfk-formula-item p{font-size:.9em;color:#555;margin-bottom:0}#pfk-modal-body .pfk-formula-display-modal{font-size:1.8em;color:#333;margin-bottom:15px;padding:15px;background-color:#e6f2ff;border-radius:4px;text-align:center;font-weight:700}#pfk-modal-body .pfk-formula-display-modal sup,#pfk-modal-body .pfk-formula-display-modal sub{line-height:0}#pfk-modal-body .pfk-variables-list{list-style:none;padding-left:0;margin-bottom:15px}#pfk-modal-body .pfk-variables-list li{margin-bottom:8px;padding:5px;background-color:#f9f9f9;border-left:3px solid #0056b3}#pfk-modal-body .pfk-variables-list strong{color:#0056b3}#pfk-modal-body .pfk-formula-description{margin-bottom:20px;line-height:1.6}.pfk-calculator-section{border-top:1px solid #eee;padding-top:15px;margin-top:20px}.pfk-calculator-section h4{margin-top:0;color:#004080}.pfk-calculator-form .pfk-input-group{margin-bottom:12px}.pfk-calculator-form label{display:inline-block;width:180px;margin-bottom:5px;font-weight:400}.pfk-calculator-form input[type=number]{padding:8px;border:1px solid #ccc;border-radius:4px;width:calc(100% - 200px);max-width:150px;box-sizing:border-box}.pfk-calculator-form button{background-color:#0056b3;color:white;padding:10px 15px;border:none;border-radius:4px;cursor:pointer;font-size:1em;transition:background-color .2s;margin-right:10px}.pfk-calculator-form button:hover{background-color:#004080}#pfk-calculation-result.error{background-color:#ffe6e6;border-color:#c00;color:#c00}.pfk-visual-representation{margin-top:20px;margin-bottom:20px;padding:10px;background-color:#fff;border:1px solid #ccc;border-radius:6px;text-align:center;min-height:150px;box-sizing:border-box;overflow:hidden;position:relative}.pfk-visual-representation canvas{display:inline-block;max-width:100%;background-color:#f0f8ff}.pfk-visual-representation p.pfk-animation-placeholder{display:flex;justify-content:center;align-items:center;height:150px;color:#777;font-style:italic;margin:0}@media (max-width:768px){.pfk-calculator-form label{width:100%}.pfk-calculator-form input[type=number]{width:100%;max-width:none}}@media (max-width:480px){.pfk-formula-item h3{font-size:16px}#pfk-modal-body .pfk-formula-display-modal{font-size:1.5em}}