update styles of #mw-header on small screen

Signed-off-by: WaitSpring <me@waitspring.com>

resources/screen-mobile-small.less

@@ -17,7 +17,10 @@
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
-@import 'variables.less';
+#mw-header {
+	padding-top: 0.5em;
+	gap: 0.5em 1.25em;
+}
 
 #p-logo-text {
 	display: none;