#errores {
    color: red;
    font-weight: bold;
    text-align: center;
}

#tablaPedidosActivos {
    animation: fadeIn 1s;
}

#tablaPedidosFinalizados, #divVerPedido {
    animation: fadeInFin 1s;
}

@keyframes fadeIn {
    0% {
        opacity: 0;
        background-color: grey;
    }
    100% {
        opacity: 1;
    }
}

@keyframes fadeInFin {
    0% {
        opacity: 0;
        background-color: green;
    }
    100% {
        opacity: 1;
    }
}