CSS Validator

• Unknown property “colour” — did you mean “color”?Line 2, column 3 · unknown-property
• “#ggg” is not a valid hex colour.Line 3, column 3 · bad-color
• “0” needs no unit in “margin: 0px auto”.Line 4, column 3 · zero-unit
• Unknown unit “pxx” in “10pxx”.Line 5, column 3 · unknown-unit
• Selector ends with a comma: “.nav,”.Line 8, column 1 · selector
• Expected “property: value” but found “display flex”.Line 9, column 3 · missing-colon
• Missing semicolon after “color: white”.Line 13, column 3 · missing-semicolon
• “color” is set twice in this rule (first on line 13).Line 15, column 3 · duplicate-property
• Empty rule “.empty”.Line 18, column 1 · empty-rule
• Missing “}” for this block.Line 19, column 1 · missing-brace

1.header {
2  colour: #333;
3  background: #ggg;
4  margin: 0px auto;
5  padding: 10pxx;
6}
7 
8.nav, {
9  display flex;
10}
11 
12.button {
13  color: white
14  background: blue;
15  color: red;
16}
17 
18.empty {}
19@media (max-width: 600px) {
20  .header { font-size: 14px; }
21