body { font-family: 'Roboto', sans-serif; }
.card-img-top { height: 200px; object-fit: cover; }
.btn-whatsapp {
    position: fixed; bottom: 20px; right: 20px; z-index: 1000;
    background:#25d366; color:#fff; border-radius:50px;
    padding:12px 18px; box-shadow:0 2px 10px rgba(0,0,0,.3);
}