.hero-header {
    background: linear-gradient(rgba(18, 15, 45, .5), rgba(18, 15, 45, .5)), url(../img/carousel-travel-1.jpg) top right no-repeat;
    background-size: cover;
}
.bg-offer {
    background: linear-gradient(rgba(18, 15, 45, .5), rgba(18, 15, 45, .5)), url(../img/carousel-travel-1.jpg) top right no-repeat;
    background-size: cover;
}