Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

CSS CSS Selectors Going Further with Attribute Selectors and Pseudo-Classes :first-child and :last-child Challenge

Saud ALQahtani
Saud ALQahtani
7,842 Points

Next, create a new pseudo-class selector that targets the last-child li in .main-nav. Give it a top-right and bottom-rig

not working

/* Complete the challenge by writing CSS below */
.main-nav li:first-child {
  border: none;
  border-radius: 5px 0px 0px 5px;

.main-nav li:last-child {
  top: 50px;
  bottom: 50px;
  border: none;
  border-radius: 5px 0px 0px 5px;
<!DOCTYPE html>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link href='http://fonts.googleapis.com/css?family=Nunito:400,300' rel='stylesheet' type='text/css'>
  <link rel="stylesheet" href="page.css">
  <link rel="stylesheet" href="style.css">
      <h1>My Site!</h1>
      <ul class="main-nav">
        <li><a href="#">Home</a></li>
        <li><a href="#">About</a></li>
        <li><a href="#">Work</a></li>
        <li><a href="#">Contact</a></li>
      <p>Tattooed viral put a bird on it skateboard. Drinking vinegar locavore squid farm-to-table, dreamcatcher tattooed kitsch scenester. Tousled wolf squid Wes Anderson PBR, Williamsburg banh mi dreamcatcher stumptown ethnic sartorial mlkshk. Hella mixtape bespoke mustache Bushwick. Post-ironic hashtag jean shorts, Truffaut organic roof party pop-up wayfarers selvage narwhal. Mixtape roof party twee, post-ironic bespoke hella artisan meggings Carles brunch pop-up Tonx street art normcore. DIY paleo slow-carb occupy tofu fingerstache.</p>


The text asks to create a new pseudo-class selector that targets the last-child li in .main-nav.

the way you are doing it you are creating the last li child of main nav.

Try creating the last element inside li.

1 Answer

/* Complete the challenge by writing CSS below */
.main-nav li:first-child{
 border: none;
  border-radius: 5px 0 0 5px;

.main-nav li:last-child{
 border-radius: 0 5px 5px 0; 

Try this instead. border radius should be at 5px WHERE SPECIFIED (The second one asks for the top right and bottom right instead). The second prompt only asks you to manipulate border-radius, but you COULD change those values too in practice.