.mainContent {
    min-height:100%;
    background:linear-gradient(0deg, rgba(0, 0, 0, 0.3), rgba(0, 0, 0, 0.2)), url('../imgs/beliefs2.jpg');
    color: rgb(255, 255, 255); /* Text color */
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5); /* Optional shadow for better readability */
    min-height:100%;
    background-size:cover;
    background-repeat: no-repeat;
}