.product-price {  color: #3e4b3c !important;  font-weight: bold;}

body {  font-family: 'Segoe UI', 'Lato', 'Helvetica', sans-serif;  font-size: 18px;  color: #3e3e3e;}
<a href="#" style="  display: inline-block;  background-color: #3e4b3c;  color: #ffffff;  padding: 12px 24px;  text-decoration: none;  font-size: 16px;  border-radius: 40px;  box-shadow: 0 4px 6px rgba(0,0,0,0.1);  transition: background-color 0.3s ease;" onmouseover="this.style.backgroundColor='#2f3c2e'" onmouseout="this.style.backgroundColor='#3e4b3c'">  Agregar al carrito</a>