The pseudo-classes demo gave a book-cart reservation panel visible feedback. Recreate those state styles so readers can spot the first pick, a hovered button, and a focused field.
Checkpoint: the first book title is bold; hovering the button darkens it; clicking the email field draws a cyan outline.
.reserve-button:hover to set the button background color to #d97706..reading-list li:first-child to set the first reading-list item font-weight to 700..email:focus to set the email field outline to 3px solid #67e8f9.Add :hover directly after the button class.
The focus outline needs a width, style, and color.