body {
            font-family: Arial, sans-serif;
            background: #eef2f3;
            text-align: center;
            padding: 50px;
        }
        .card {
            background: #fff;
            max-width: 400px;
            margin: auto;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        h1 {
            margin-bottom: 10px;
        }
        .temp {
            font-size: 48px;
            margin: 20px 0;
        }
        .status {
            font-size: 18px;
            color: #555;
        }
        button {
            padding: 10px 20px;
            font-size: 16px;
            cursor: pointer;
        }
        .error {
            color: red;
            margin-top: 15px;
        }