Hello,

1) Please try adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.

.product-grid-item .price .amount {
    color: black;
}

2) Please try adding the following Custom CSS in the Custom CSS for Desktop area under Theme Settings >> Custom CSS.

.product-image-summary .shop_attributes {
    width: 270px;
}

Regards.
Xtemos Studios