CSS Selector on custom element
<p>Is there any contraindications on stylizing Angular2 custom element directly and selecting them with CSS selector ?</p>

<p>Example : </p>

<pre><code>// HTML
&lt;My-Page&gt;
    &lt;header&gt;&lt;/header&gt;
    &lt;main&gt;&lt;/main&gt;
    &lt;My-Footer class="sticky-footer"&gt;&lt;/My-Footer&gt;
&lt;/My-Page&gt;

// CSS 
My-Page {
    background-color: grey;
}

header {
    ...
}

.sticky-footer {
    position: absolute;
}
</code></pre>

<p>Good or bad practice ? </p>