Here is a bit of CSS that makes Auctions for WooCommerce bid input look a bit better in Salient Theme.
.auction_form.cart div.quantity {
width: auto !important;
border: none;
margin: 0 10px 0 0 !important;
position: initial !important;
opacity: 1 !important;
visibility: visible !important;
pointer-events: initial !important;
float:left !important;
}
.auction_form .quantity.buttons_added {display: block !important; visibility: visible !important;}