.content-opening {
    background-image:
        linear-gradient(
            135deg,
            rgba(13, 13, 13, 0.86) 0%,
            rgba(13, 13, 13, 0.68) 45%,
            rgba(13, 13, 13, 0.9) 100%
        ),
        url('../images/services-images/moresnowboarding.webp');
}