.water-calculator-container{max-width:750px;margin:20px auto;padding:20px;background:#f8fcff;border-radius:10px;border:1px solid #cfe8fc}.water-calculator-form{background:#fff;padding:20px;border-radius:8px}.water-form-group{margin-bottom:15px}.water-form-control{width:100%;padding:8px;border:1px solid #a1d2f6;border-radius:4px;box-sizing:border-box}.water-unit-group{display:flex;gap:15px;margin-top:5px}.water-calculate-btn{background:#2196F3;color:#fff;padding:12px 20px;border:none;border-radius:4px;cursor:pointer;width:100%;font-size:16px}.water-calculate-btn:hover{background:#1976D2}.water-hidden{display:none!important}#water-results{margin-top:20px;padding:15px;background:#e3f2fd;border-radius:4px}.water-tip{color:#0d47a1;padding:10px;margin-top:15px;background:#bbdefb;border-left:4px solid #2196F3}