Minamaze by ThinkUpThemes: Need Code to Change Button Colors & Footer

Hello WP Forum! I searched through my themes documents but they don’t have their own support or forum to assist with creating custom CSS to alter some of the built-in design to the theme. I am looking for help with code on a few different aspects to my homepage:

1. Theme buttons on the homepage (such as Sign Up Here, or Read More) are RED. How can I change this color to say, Black?

2. How can I change the footer background to white? Tried the following code, unsuccessful:

footer#colophon {
background: #ecede6;
}

3. How can I change all footer text to black (links, titles, text). I have control over my Mailchimp form colors, so I can update that to black, the rest I cannot choose the colors.

4. How can I remove the footer theme credit? Tried the following code I use for my other website, but it does not work:

.footer-credits {
display: none;
}

MUCH APPRECIATED!!!

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