Fix talk-card row stretch when expanding 'Read the full abstract'

Author: Copilot

src/pug/builder-days-2026/index.pug

@@ -103,7 +103,7 @@ html(lang='en')
                     .col-lg-9
                         p.text-center.text-muted
                             | Four OS4CSAPI participants are filling speaking slots on the final afternoon of the sprint, each presenting on a Connected Systems topic. These are individual contributions to the broader OGC Builder Days agenda — not a dedicated CSAPI track. All sessions are accessible in person at Geovation, on Microsoft Teams, and via the #connected-systems Discord channel.
-                .row.g-4
+                .row.g-4.align-items-start
                     each talk in event.csapiDay.talks
                         .col-md-6
                             .card.talk-card

src/scss/sections/_talks.scss

@@ -10,7 +10,6 @@
     overflow: hidden;
     transition: transform 0.2s ease, box-shadow 0.2s ease;
     border-top: 5px solid $primary;
-    height: 100%;
 
     &:hover {
         transform: translateY(-3px);