What is an overlay CSS?

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Tags

1. #185px
2. #appears
3. #positioning
4. #simple
5. #overlay
6. #overlaya
7. #solutions
8. #colour
9. #effect
10. #setting
11. #hovers
12. #absolute
13. #transparent
14. #opacity
15. #background
16. #positioned
17. #using
18. #nothing
19. #apply
20. #image