Site template picker header does not have margins on wide screens
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3578501. -->
Reported by: [gábor hojtsy](https://www.drupal.org/user/4166)
Related to !846
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Once we have more site templates, the installer theme shows like this. On wide screens this pushes up the header and it mushes into the branding at the top.</p>
<p>Most breakpoints the spacing is really nice:</p>
<p><img src="https://www.drupal.org/files/issues/2026-03-11/Screenshot%202026-03-11%20at%2012.40.20.png"></p>
<p>Wide breakpoint the headers mush tohether (also note the language picker assumes a less wide size than the matrix does, which looks odd too):</p>
<p><img src="https://www.drupal.org/files/issues/2026-03-11/Screenshot%202026-03-11%20at%2012.40.34.png"></p>
<h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-data-model-changes">Configuration changes</h3>
issue