.nav-link { color:#000; font-weight: bold; font-size: 20px; }
.nav-link:hover { color:#000; font-weight: bold; font-size: 20px; text-decoration: underline; }
.home-hero { height: 564px; background-image: url("../img/cartagraph-hero.jpg"); background-position: bottom; background-size: cover; }
.home-hero-img {  height: 400px; }
.section-heading { font-weight: 700; font-size: 56px; }
.content-overlay { background-color: rgba(0, 0, 0, 0.5); height: 100%; color: #fff;}
@media (max-width: 768px) {
    .home-hero { height: 475px; background-position: left; }
    .home-hero-img {  height: 260px; }
}