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CSS CSS Basics (2014) Understanding Values and Units Em and Rem Units

This question has me way confused? I need to go back and watch the video before this and do not see a way? Help?

Does anyone know how to go back and watch the video right before this so I can see if I understand how to convert the numbers?

style.css
/* Complete the challenge by writing CSS below */

header {
  font-size: 1.8em;
}

.title {
  font-size: 1.625em;
}

h1 {
  font-size: 5.625em;
}
index.html
<!DOCTYPE html>
<html>
  <head>
    <title>Lake Tahoe</title>
    <link rel="stylesheet" href="page.css">
    <link rel="stylesheet" href="style.css">
  </head>
  <body>
    <header>
      <span class="title">Journey through the Sierra Nevada Mountains</span>
      <h1>Lake Tahoe, California</h1>
    </header>
    <div class="main-content">
      <p>
        Lake Tahoe is one of the most breathtaking attractions located in California. It's home to a number of ski resorts, summer outdoor recreation, and tourist attractions. Snow and skiing are a significant part of the area's reputation.
      </p>
      <a href="#">Find out more</a>
      <h2>Check out all the Wildlife</h2>
      <p>
        As spawning season approaches, the fish acquire a humpback and protuberant jaw. After spawning, they die and their carcasses provide a feast for gatherings of mink, bears, and Bald eagles.
      </p>
      <a href="#">See the Wildlife</a>
      <h3>From Tents to Resorts</h3>
      <p>
        Lake Tahoe is full of wonderful places to stay. You have the ability to sleep in the outdoors in a tent, or relax like a king at a five star resort. Here are our top three resorts:
      </p>
    </div>
    <footer>
      <p>All rights reserved to the state of <a href="#">California</a>.</p>
      <a href="#top">Back to top &raquo;</a>
    </footer>
  </body>
</html>

3 Answers

Steven Parker
Steven Parker
231,248 Points

Quick hint for task 1: The "unit that is relative to the root element of the page" is "rem".

You can skip back to the last video by clicking on the circle just left of the current one on the bar that goes across the top of the page. The current page is represented by the circle with the ring around it, and completed steps have a check-mark inside them.

Great, thanks!

Faraz Mobin
Faraz Mobin
14,659 Points

em unit is relative to body element 1 em = 16px and rem unit is relative to root element of a document which is html element