body {
            font-family: Arial, sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            margin: 0;
            background-color: #f4f4f4;
        }
        button {
            padding: 10px 20px;
            font-size: 16px;
            cursor: pointer;
            margin: 5px;
            border: none;
            border-radius: 5px;
            transition: background-color 0.3s;
        }
        #btnGravar {
            background-color: #4CAF50; /* Verde */
            color: white;
        }
        #btnGravar:hover {
            background-color: #45a049;
        }
        #btnParar {
            background-color: #f44336; /* Vermelho */
            color: white;
            display: none; /* Escondido inicialmente */
        }
        #btnParar:hover {
            background-color: #da190b;
        }
        #status {
            margin-bottom: 20px;
            font-weight: bold;
            color: #333;
        }