Change styling (CSS) of Cart and Discount code buttons

If you cannot see the two pictures in first post, this is the links:

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Please post the url to your site. For these types of issues its necessary to examine the markup and styles using browser tools. Markup and styles vary between themes.

The URL is https://www.restauram.com/. I am using latest Flatsome theme if that helps.

Note that the site is still under construction on a temporary domain and contains random content at the moment ??

PS: I just realised I also need to style the “Logg inn” button that appears in the pop up when clicking “Logg inn / registrer” in the very top right corner.

Any tips to this? I am sure this must be an easy fix, I just don’t know the CSS class or selector to use to style the buttons.

/* LOGG INN */
#login-form-popup input.button {
  background:#ffe !important;
}
/* VIS HANDLEKURV */
.woocommerce-page .widget_shopping_cart a.button.wc-forward {
  background-color:#eef !important;   
}
/* TILL KASSEN */
.woocommerce-page .widget_shopping_cart a.button.checkout {
  background-color:#efe !important;   
}
/* Coupon field */
.coupon input[type="text"] {
  background-color:#fee;  
}
/* Coupon button */
input[type='submit'].is-form {
  background-color: rgb(122, 193, 149);
  color: #000;
  text-shadow:none;
  border: 2px solid #000;
  border-radius:10px;
}