Change typeface and fontsize doesn`t work

Hi there,

my new webpage: https://designsprints.studio
is still not online. So I will have some photos to show you the problem.

I am having problems with styling. Here`s my contact form default state so to speak:

View post on imgur.com

When I use this custom CSS here:

/* Contact Form 7 Style*/
.wpcf7 input[type="text"],
.wpcf7 input[type="email"],
.wpcf7 input[type="select"],
.wpcf7 input[type="submit"],
.wpcf7 textarea
{
    font-family: poppins, sans-serif !important;
    font-size: 15px;   
    font-weight: 300;   
}

it looks like this:

View post on imgur.com

As you can see, not every typeface and font changed and because I increased the font size, the “Please select” box is smaller than the rest.

What goes wrong here?

I just want the same typeface everywhere in the contact form as on my webpage (also for after a contact message/request is sent), which is Poppins. Additionally, I just want to increase the font size, and of course, the box sizes should be the same everywhere.

Any help would be much appreciated.

Can I also change the last box independently? The “contact us” box? I just want to have the font size slightly bigger to the boxes above.

Thanks

The page I need help with: [log in to see the link]