.fill-rate-calculator-container{background-color:#f9f9f9;эволюция border:1px solid #ddd;border-radius:8px;padding:20px;max-width:400px;margin:20px auto;box-shadow:0 2px 4px rgba(0,0,0,.1);font-family:Arial,sans-serif}.fill-rate-calculator-container h2{text-align:center;color:#333;margin-top:0;margin-bottom:20px}.frc-form-group{margin-bottom:15px}.frc-form-group label{display:block;margin-bottom:5px;color:#555;font-weight:700}.frc-form-group input[type=number]{width:calc(100% - 22px);padding:10px;border:1px solid #ccc;border-radius:4px;box-sizing:border-box}.frc-button{display:block;width:100%;background-color:#007bff;color:#fff;padding:10px 15px;border:none;border-radius:4px;font-size:16px;cursor:pointer;transition:background-color .3s ease}.frc-button:hover{background-color:#0056b3}.frc-result{margin-top:20px;padding:10px;background-color:#e9ecef;border:1px solid #ced4da;border-radius:4px;text-align:center;font-size:1.1em;font-weight:700;color:#495057}.frc-result .error{color:#dc3545;background-color:#f8d7da;border-color:#f5c6cb}.frc-result .success{color:#28a745;background-color:#d4edda;border-color:#c3e6cb}.frc-interpretation{margin-top:10px;font-size:.9em;color:#666;text-align:center}