.image-overlay-block {
    position: relative;
    width: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.image-overlay-block h1 {
    color: #fff;
}

.image-overlay-block .overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.4);
}

.image-overlay-block .content {
    position: absolute;
    top: 110px; 
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: #fff;
    width: 80%;
}

.image-overlay-block .content h1 {
    margin: 0;
    font-size: 48px;
}

.image-overlay-block .content .subheading {
    margin-top: 10px;
    font-size: 28px;
}

/* Optional: mobile tweaks */
@media (max-width: 768px) {
    .image-overlay-block .content {
    width: 90%;
    }
    .image-overlay-block .content h1 {
        font-size: 32px;
        line-height: 36px;
    }
    .image-overlay-block .content .subheading {
        font-size: 22px;
        line-height: 26px;
    }
}