Problem in code display


hi, I wrote a simple html code but the css part does not run. please guide me.

this error is displayed.
Command not configured for CSS!
Add an [issue on GitHub] or send your own Pull Request.

margin: 0;
padding: 0;
box-sizing: border-box;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
-o-box-sizing: border-box;

body {
background: lightblue;
font-family: tahoma;
font-size: 12px;

color: blue;
text-decoration-line: none;

width: auto;
margin: 20px auto;
width: 100%;
background-color: blue;
float: right;
.wrapper.meno ul li{
float: right;
list-style: none;
border: 1px solid #fff;

.wrapper.meno ul li a{
display: block;
padding: 5px 10px;
color: #fff;
.wrapper.meno ul li a hover{
background: yellow;


What command are you trying to use? Mind posting a screenshot of your HTML file?


this is the html & css file.

When I want to run the css file with the command+i key. This error is displayed.


What do you expect to happen? CSS doesn’t get run like that. Your browser interprets the CSS when you look at a web page.


mercy. So what should I do to have the code displayed correctly in Safari browser?


open the html file in safari.


Well, I’m doing this, but the result is not right.
I do not know which part of this menu code I’ve written wrong?


You don’t have any element that has both the classes wrapper and meno, which is what .wrapper.meno is looking for. What you want is .wrapper .meno. Also, hover isn’t a tag name. That should be a:hover.