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← CSS
○CSS Rule Demo: Style an Exhibit Card○Exercise: Write Your First CSS Rule○CSS Selectors Demo: Target Exhibit Details○Exercise: Target Exhibit Details●Apply CSS Demo: Three Sources○Exercise: Apply CSS Three Ways○Specificity Demo: Resolve a Style Conflict○Exercise: Resolve Specificity✦Module Quiz
○Color Palette Demo○Color Palette Exercise○Background Layer Demo○Background Layer Exercise○Type Rhythm Demo○Type Rhythm Exercise○Borders and Shadows Demo○Exercise: Borders and Shadows✦Module Quiz
○Box Model Demo: Seed Packet Card○Exercise: Space a Seed Packet○Display Demo: Swap Table Labels○Exercise: Arrange Swap Table Labels○Positioning Demo: Pickup Pin○Exercise: Pin the Pickup Location○Sizing and Overflow Demo○Exercise: Size a Seed-Swap Notice✦Module Quiz
○Advanced Selectors Demo: Book Cart Sign○Exercise: Target a Book Cart Sign○Pseudo-Classes Demo: Night Cart States○Exercise: Style Night Cart States○Pseudo-Elements Demo○Exercise: Add a Book-Quote Mark
○Lantern Market navigation demo○Lantern Market navigation exercise
○Community garden request card demo○Community garden request card exercise
○Flex Direction Demo○Exercise: Flex Direction○Main-Axis Spacing Demo○Exercise: Main-Axis Spacing○Cross-Axis Alignment Demo○Exercise: Cross-Axis Alignment○Wrapping and Flex Items Demo○Exercise: Wrapping and Flex Items○Flexbox Navigation Demo○Exercise: Flexbox Navigation
○Grid Tracks Demo○Exercise: Grid Tracks○Grid Gaps Demo○Exercise: Grid Gaps○Grid Placement Demo○Exercise: Grid Placement○Responsive Grid Demo○Exercise: Responsive Grid
○River radio schedule demo○River radio schedule exercise
○Field note color system demo○Field note color system exercise○Transforms Demo○Exercise: Rotate a Field Note
○Kite festival signal demo○Kite festival signal exercise
○Garden forecast demo○Harbor forecast exercise○Fluid sizing demo○Fluid weather bulletin exercise✦Module Quiz
○Seed inventory table demo○Tool checkout table exercise✦Module Quiz
○Community maker profile demo○Maker profile sheet exercise✦Module Quiz

Apply CSS Demo: Three Sources

Mission

The museum team inherited a card with three CSS sources. Run the example to see the scope of each source before choosing one in the exercise.

What you'll see

An exhibit card with a locally colored heading, an internal paragraph-size rule, and an external page background.

Read the code

html
<h1 style="color: #7a1fa2;">Three CSS Sources</h1>
<style>p { font-size: 18px; }</style>
<link rel="stylesheet" href="style.css">

Try the preview

Run the completed page. Change the inline heading color, then the p font size in the internal <style> block, then the body background in style.css. Notice which part of the page each source controls; restore the original values before continuing.

Checkpoint

The heading's style attribute affects that element, the <style> rule targets paragraphs in this page, and the linked style.css sets the body background. This demo is already complete.

Next

Continue to Exercise: Apply CSS Three Ways and reproduce the idea from a starter file.

Hint 1
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HINT 1

This completed example is for reading and previewing before the exercise.

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