.hero-banner {
    background: linear-gradient(rgba(0,0,0,0.4), rgba(0,0,0,0.4)), url('images/bannerusa.png');
    background-size: cover;
    background-position: center;
    height: 800px;
    display: flex;
    align-items: center;
    color: white;
    margin-bottom: 4rem;
}