.calculator{background:#fff;padding:20px;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1)}.form-group{margin-bottom:15px}label{display:block;margin-bottom:5px;font-weight:700}input,select{width:100%;padding:8px;border:1px solid #ddd;border-radius:4px;margin-bottom:10px}button{background-color:#007bff;color:#fff;padding:10px 20px;border:none;border-radius:4px;cursor:pointer}button:hover{background-color:#0056b3}.result{margin-top:20px;padding:15px;border-radius:4px;background-color:#e9ecef}.error{color:red;font-size:.9em;margin-top:5px}indemniteLicenciement