.add-device-container{width:90%;max-width:400px;margin:20px auto;padding:20px;background-color:#f9f9f9;border:1px solid #ddd;color:black;border-radius:8px;box-shadow:0 2px 4px rgba(0,0,0,.1)}.add-device-container h2{text-align:center;color:#333;font-size:1.5rem}form{display:flex;flex-direction:column}label{margin-top:10px;font-weight:700}input,textarea{padding:10px;margin-top:5px;border:1px solid #ccc;border-radius:4px;font-size:16px}textarea{resize:vertical;min-height:100px}button{margin-top:15px;padding:12px;background-color:#007bff;color:white;border:none;border-radius:4px;cursor:pointer;font-weight:700;transition:background-color .3s ease;font-size:16px}button:hover{background-color:#0056b3}.error,.success{text-align:center;font-size:14px;color:black}@media (max-width:480px){.add-device-container{width:95%;padding:15px}button,input,textarea{font-size:14px}}