Adjust calendar title styling and event card layout

Updated the calendar title to use a smaller heading style for consistency. Modified the event card column layout to improve responsiveness and optimize spacing.

core/templates/core/event_page.html

@@ -187,7 +187,7 @@
             <!-- Event Details Cards -->
             <div class="row mb-4">
                 {% if self.location_name %}
-                    <div class="col-lg-4 col-md-6 col-12 mb-4">
+                    <div class="col-lg-6 col-12 mb-4">
                         <div class="card h-100 border-0 shadow-sm event-detail-card">
                             <div class="card-body">
                                 <h3 class="card-title mb-4">

core/templates/core/tags/event_calendar.html

@@ -2,7 +2,7 @@
 
 <div class="event-calendar">
     <div class="event-calendar-header mb-3">
-        <h2 class="event-calendar-title">Veranstaltungskalender</h2>
+        <h2 class="h4 event-calendar-title">Veranstaltungskalender</h2>
     </div>
     <div class="event-list mb-4 overflow-auto" style="max-height: 300px; overflow-x: hidden !important;">
         {% for event in events %}