Add to Cart buttons not working in WordPress

I am figuring out the plugin implementation okay. And the buttons were working okay, but I didn’t like the styling. So I added some of my own .css and now they don’t seem to be working at all.

Here is the .css I’m using

.uc-item section.uc-item-info .uc-item-price{
font-size: 200%;
}

.uc-item section.uc-item-info h1 {
font-size: 200%;
line-height: 250%;
font-weight: 700;
}

.uc-item section.uc-item-info .uc-item-add .uc-qty
{
text-align: left;
}

.uc-item section.uc-item-info .uc-item-add .uc-add-btn{}

.uc-safeplace .uc-button {
background: #ff0000;
color: #ffffff;
font-size: 1.5em;
font-weight: 700;
width: 60%;
padding: 8px;
transition: background 0.5s ease-in-out 0s, color 0.5s ease-in-out 0s;
white-space: nowrap;
}

See the buttons at
https://telarralabs.com/axedyne-plus-premium-brain-formula/
https://telarralabs.com/elavex-premium-mood-formula/
https://telarralabs.com/vitaxa-energy-forumla/

Our Ultracart store is at https://telab.ultracartstore.com/ and seems to be working there. Client is happy with the backend features of Ultracart and wants to launch it early next week.