Black background in the fields form

I need help because I have a problem with the bg of the fields forms
It happens in the forms modules and the articles, they go black, I did a test changing to beez3 and the form is correct

url please

Since the form has that error, we have it in proof on a provisional page,
johnbarros.com/index.php/form-article
press the botton on the right at the top (SCHEDULE A CALL)

Please add this code to your css/custom.css

select:focus, textarea:focus, input[type="text"]:focus, input[type="password"]:focus, input[type="datetime"]:focus, input[type="datetime-local"]:focus, input[type="date"]:focus, input[type="month"]:focus, input[type="time"]:focus, input[type="week"]:focus, input[type="number"]:focus, input[type="email"]:focus, input[type="url"]:focus, input[type="search"]:focus, input[type="tel"]:focus, input[type="color"]:focus, .uneditable-input:focus {
border-color: #d6bc76;
background: #000;
}

The custon css has worked on something, as you can see what is written inside the some field.
But the bg still remains black and the letters come out white
In addition, the fields text area and button submit remain the same as before.
If the text area and the button submit would work like the others, I would not mind if the bg remains black.

I cant see any code at css/custom.css
view-source:http://johnbarros.com/templates/jp-gusto/css/custom.css

Please follow my instruction or find the css code by yourself.
Here is a video how it works
www.joomlaplates.com/template-customizing