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 How to Make a Website Responsive Web Design and Testing Website Testing

Invalid CSS

When I tried to validate my CSS, I got an error back saying that the pseudo-class "selected" was unknown and therefore invalid.

What can I change in order to validate my code???

3 Answers

It is because :selected is not a psuedo-class.

aah, i see! thank you!

Glad I could help. Please mark best answer to close this out if your happy with the answer.

:)

Please post your code.

here's my css:

/*****************************
GENERAL
*****************************/

body {
  font-family: 'Open Sans', sans-serif;
}

a {
  text-decoration: none;
  color: #fcf7ff;
}

#wrapper {
  max-width: 940px;
  margin: 0 auto;
  padding: 5% 5%;
}

img {
  max-width: 100%;
}

h3 {
  margin: 0 0 1em 0;
}

/*****************************
HEADING
*****************************/

#logo {
  text-align: center;
  margin: 0;
}


header {
  font-family: 'Ubuntu-Condensed', sans-serif;
  margin: 15px 0;
  font-weight: normal;
}

header {
  float: left;
  margin: 0 0 30px 0;
  padding: 5px 0 0 0;
  width: 100%;
}

/*****************************
NAVEGATION
*****************************/

nav {
  text-align: center;
  padding: 10px 0;
  margin: 20px 0 0;
}

nav ul {
  list-style: none;
  margin: 0 10px;
  padding: 0;
}

nav li {
  display: inline-block;
}

nav a {
  font-weight: 700;
  padding: 15px 10px;
}


/*****************************
PAGE: PORTFOLIO
*****************************/

#gallery {
  margin: 0;
  padding: 0;
  list-style: none;
}

#gallery li {
  float: left;
  width: 45%;
  margin: 2.5%;
  background-color: #070707;
  color: #655560;
}

#gallery li a p {
  margin: 0;
  padding: 5%;
  font-size: 0.75em;
  color: #fcf7ff;
}


/*****************************
PAGE: ABOUT
*****************************/
.profile-photo {
  display: block;
  max-width: 150px;
  margin: 0 auto 30px;
  border-radius: 100%;
}

.about-box {
  color: #fcf7ff;
}

/*****************************
PAGE: CONTACT
*****************************/
.container {
 color: #fcf7ff;
}

.contact-info {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 0.9em;
}

.contact-info a {
  display: block;
  min-height: 20px;
  background-repeat: no-repeat;
  background-size: 20px 20px;
  padding: 0 0 0 30px;
  margin: 0 0 10px;
}

.contact-info li.phone a {
  background-image: url('../img/phone.png')
}

.contact-info li.mail a {
  background-image: url('../img/mail.png')
}

.contact-info li.twitter a {
  background-image: url('../img/twitter.png')
}

/*****************************
FOOTER
*****************************/

footer {
  font-size: 0.75em;
  text-align: center;
  clear: both;
  margin: 15px 0;
  padding: 5px 0 0 0;
  width: 100%;
}

.social-icon {
  width: 20px;
  height: 20px;
  margin: 0 5px;
}


/*****************************
COLORS
*****************************/

/* PALETTE COLORS: #fcf7ff, #070707, #7a7d7d, #565254, #655560 */

/* header and body gradients (gray) */
body {
  background: #7a7d7d;
  background: -webkit-linear-gradient(#4c504d, #070707);
  background:    -moz-linear-gradient(#4c504d, #070707);
  background:         linear-gradient(#4c504d, #070707);
}

header {
  background-color: #565254;
  background: -webkit-linear-gradient(#7c7779, #565254);
  background:    -moz-linear-gradient(#7c7779, #565254);
  background:         linear-gradient(#7c7779, #565254);
  color: #fcf7ff;
}

footer {
  color: #fcf7ff;
}

nav a, nav a:selected {
  color: #fff;
}

/* nav buttons, hover color */
nav a.selected, nav a:hover {
  color: #3f353c;
}