#iniciar-pedido-voz {
    text-align: center;
}

#icono-microfono {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 50px;
    color: red;
    display: none;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}