cookie msg - infoo popup in js/html only + jquery

index.html

<!-- inlcude/reference jquery -->

<style>
    #cookieMsgContainer {display: none;}
    #cookieMsg + section {transition: .5s ease-out; z-index: 2000;}
    #cookieMsg:not(:checked) + section {transform: translateY(100%);}
</style>
<input type="checkbox" checked id="cookieMsg" style="display: none" />
<section id="cookieMsgContainer" style="position: fixed; bottom: 0; left: 0; background: black; text-align: left; color: white; width: 100vw; padding: 25px; font-family: sans-serif;">

    <article style="max-width: 600px; margin: auto;">
        <p><strong>Diese Seite verwendet Cookies</strong></p>

        <ul>
            <li>... um die Navigation auf dieser Seite zu ermöglichen <small>(Session-Cookie)</small>.</li>
            <li>... um den Traffic auf dieser Website zu analysieren. Informationen zu Ihrer Nutzung auf dieser Website werden anonym an Google übermittelt.</li>
        </ul>

        <p>
            <a style="color: #08c" href="/datenschutz/">Weitere Details</a>
        </p>

        <p style="text-align: center;">
            <label for="cookieMsg" style="padding: 10px; background: #08c; color: white; max-width: 100px; text-align: center; cursor: pointer;">Akzeptieren</label>
        </p>
    </article>

</section>
<script>
  (function($) {
    $(function() {
      if (cookie.get('cookieMsgSeen') !== 'yes')
      {
        cookie.set('cookieMsgSeen', 'yes', 365);
        $('#cookieMsgContainer').css('display', 'block');
      }
    });
  })(jQuery);
</script>

main.js

(function() {
    var cookie = function() {};
    cookie.set = function cookieSet(cname, cvalue, exdays) {
        var d = new Date();
        d.setTime(d.getTime() + (exdays*24*60*60*1000));
        var expires = "expires="+ d.toUTCString();
        document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/;domain=." + document.location.hostname;
    }
    cookie.get = function cookieGet(cname) {
        var name = cname + "=";
        var decodedCookie = decodeURIComponent(document.cookie);
        var ca = decodedCookie.split(';');
        for(var i = 0; i <ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') {
                c = c.substring(1);
            }
            if (c.indexOf(name) == 0) {
                return c.substring(name.length, c.length);
            }
        }
        return undefined;
    }
    window.cookie = cookie;
})();