CSS media quey with colon throws false positives

Hello,
I have a .css file with media query. Drupal CodeSniffer considers it as normal css class and shows errors.

Test 1:

PHP CodeSniffer version : 2.3.1
Drupal Code Sniffer version : 8.x-2.1
in css

@media (min-width: 320px) and (max-width: 961px) {
  .tooltipsrt:hover span.tltp,
  .tooltipstp:hover span.tltp {
    visibility: hidden;
  }
}

and the error generates as :

 2 | ERROR | [ ] Style definitions must end with a semicolon
 2 | ERROR | [x] Expected 1 space after colon in style definition; 0
   |       |     found
 3 | ERROR | [ ] Style definitions must end with a semicolon
 3 | ERROR | [x] Expected 1 space after colon in style definition; 0
   |       |     found

Test 2:

PHP CodeSniffer version : 2.3.1
Drupal Code Sniffer version : 7.x-1.0

The error generates as:

Fatal error: Uncaught exception 'PHP_CodeSniffer_Exception' with message 'Class PHP_CodeSniffer_CommentParser_ClassCommentParser not found' in C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer\Standards\Drupal\Sniffs\Commenting\FileCommentSniff.php on line 13

PHP_CodeSniffer_Exception: Class PHP_CodeSniffer_CommentParser_ClassCommentParser not found in C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer\Standards\Drupal\Sniffs\Commenting\FileCommentSniff.php on line 13

Call Stack:
    0.0002     123664   1. {main}() C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\scripts\phpcs:0
    0.0125    1057816   2. PHP_CodeSniffer_CLI->runphpcs() C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\scripts\phpcs:25
    0.0132    1098816   3. PHP_CodeSniffer_CLI->process() C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer\CLI.php:95
    0.0161    1106496   4. PHP_CodeSniffer->initStandard() C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer\CLI.php:830
    0.0972    1141904   5. PHP_CodeSniffer->registerSniffs() C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer.php:560
    0.1026    1218960   6. include_once('C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer\Standards\Drupal\Sniffs\Commenting\FileCommentSniff.php') C:\wamp\bin\php\php5.5.12\PHP_CodeSniffer\CodeSniffer.php:1318

Test 3:

I have followed the steps in the link: https://www.drupal.org/node/1431428#comment-9893517
Clonnned the code from http://cgit.drupalcode.org/drupalcs/commit/?id=905fa01 using the command: git://git.drupal.org/project/drupalcs.git

Now, it shows the following error in the Test 2.

Thanks in advance,
How can I fix this issue?