<!DOCTYPE html>
<html><head>
    <title>CSS Variables Test: custom property names start with "var-" in lower case</title>
    <meta charset="UTF-8">
    <link href="mailto:noahcollins@gmail.com" rel="author" title="Noah Collins">
    <style type="text/css">
        :root {
            /* these should be VALID custom property names */
            var-veryblue:   #22e;
            var-AlsoBlue:   #22e;

            /* these should be INVALID custom property names */
            VAR-veryred:   #f00;
            Var-AlsoRed:   #f00;
        }

        .blue-good-1  { color: var(veryblue); }
        .blue-good-2  { color: var(AlsoBlue); }
        .red-bad-1    { color: var(veryred);  }
        .red-bad-2    { color: var(AlsoRed);  }
    </style>
</head>
<body>
    <h2 class="blue-good-1">Valid CSS Variable Names</h2>
    <p class="blue-good-1">This paragraph is styled using a valid CSS Variable name. It should be blue.</p>
    <p class="blue-good-2">This paragraph is styled using a valid CSS Variable name. It should be blue.</p>
    <br>
    <h2>Invalid CSS Variable Names</h2>
    <p>This paragraph is styled using an invalid CSS Variable name. Fail if red.</p>
    <p>This paragraph is styled using an invalid CSS Variable name. Fail if red.</p>

</body></html>