.product-card {
position: relative;
}
.product-card::before {
content: "-20%";
position: absolute;
top: 10px;
right: 10px;
background: #E53935;
color: #fff;
padding: 6px 12px;
border-radius: 20px;
font-size: 13px;
font-weight: bold;
z-index: 10;
box-shadow: 0 3px 8px rgba(0,0,0,.2);
}
