Slider revolution padding

I am trying to remove the padding above the slider so it sits directly under the main menu header. When I inspect the element in Chrome and remove the padding it changes to how I like but when I copy the some CSS path and set the padding to 0 nothing happens. I also have trouble editing the font color in the header. It seemed to take before but now it doesn’t

CSS I used in Custom CSS:
header_color .main_menu ul:first-child > li > a {
font-size: 23px;
Font-weight: 600;
color: white;
}

.header_color .main_menu ul:first-child > li > a:hover {
color: FF6600;
Font-size: 26px;
Font-weight: 600;
}
main > div:nth-child(1) > div > main {
padding-top: 0px;
}

The relevant page: https://socialeyemarketing.com/2122-2/

Thanks a lot for any help!