Hero image + overlay + centered content (with adjustable vertical height)

hero_img_overlay_content.css

// These styles can help you get a hero image with an overlay as well as centered content placement

/* Example markup
<div id='hero-image'>
  <div id='hero-overlay'></div>
</div>
<div id='hero-content'>
  <p>Look ma, no hands!</p>
</div>
*/

// Enter the correct path for the image on line 14, you can adjust the height here if needed (be sure to match the overlay height)
#hero-image {
  background: url('hero-image.jpg') no-repeat center center fixed;
  background-size: cover;
  height: 100vh;
}

// Change opacity or color, just make sure the height remains the same as the hero-image height
#hero-overlay {
  height: 100vh;
  background-color: #000000;
  opacity: .30;
}

// This will give you centered content items; adjust the height to change the vertical placement of the items
#hero-content {
  height: 50vh;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: flex-end;
}