Horizontal centering text over image via CSS

Answer 1

Using Flex is a more"flexible" option :-)

#countdown {
  font-size: 100px;
  z-index: 10;
}

#countdown-div {
  width: 100vw;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

#bg-image {
  width: 100vw;
  height: 100vh;
  position: absolute;
  top: 0px;
  left: 0px;
}

  

    
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