Trick, Helpful CSS

All code should be add to Theme Setting > Custom CSS

1. Change BUY IT NOW text

button.shopify-payment-button__button:before {
content: "QUICK BUY";
line-height: 1.42;
text-decoration: none;
text-align: center;
white-space: normal;
font-size: 11px;
font-weight: bold;
text-transform: uppercase;
letter-spacing: 0.2em;
}

2. Custom css to change the of the warning text:

span.nt_name_current {
color: green!important;
}

3. Custom css code to change background for notice bar at the bottom:

2 custom css for change color
p.shopify-info.sp_notice.show_notice
{
background: red!important;
}

4. Disable Trash icon from Mini cart

.cart_ac_edit, .cart_ac_remove {
display: none;
}

5. Remove Quick Shop button when hover

.pr_grid_item .product-image:hover .hover_button {
opacity: 0;
}

6. Change color of page title

div#shopify-section-pages_heading h1 {
color: #333;
}