Hi Rebeca,
You can try to install https://www.ads-software.com/plugins/simple-custom-css/ and go to Appearance -> Custom CSS and add this:
.pirate_forms_wrap input, .pirate_forms_wrap textarea {
color: #666;
border: 1px solid #dedede;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
padding: 10px;
width: 300px;
}
.pirate_forms_wrap textarea {
height: auto;
min-height: 150px;
}
.pirate_forms_wrap input[type="submit"] {
background-color: #0A0A0A;
border: none;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
text-transform: uppercase;
letter-spacing: 1px;
font-size: 12px;
line-height: 1.6;
border: none;
padding: 10px 30px 10px 30px;
color: #ffffff;
font-weight: bold;
margin-bottom: 10px;
}
.pirate_forms_wrap input[type="submit"]:hover {
background-color:#272525;
}
Let me know if it helps.
Best regards,
Rodica