Fix Official information page: hero layout, short name, SKD activity

- Fix the hero: override the global flex-row .container so the eyebrow,
  title and lead stack and centre (they were laid out in a row)
- Short name -> "Društvo MŠOS za študentsko podporo in kulturno sodelovanje"
  (official kratki naziv, normal case) instead of "MSOS"
- Add the main activity row: SKD 94.999 (activities of other membership
  organisations n.e.c.), and relabel S.15000 as the institutional sector
  (SKIS). All three languages.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

css/pages/_legal.css

@@ -7,7 +7,8 @@
     background: linear-gradient(180deg, #F9FAFB 0%, #FFFFFF 100%);
     padding: 48px 24px 28px; text-align: center;
 }
-.legal-hero .container { max-width: 720px; margin: 0 auto; }
+/* Override the global flex-row .container so the hero stacks and centres. */
+.legal-hero .container { display: block; max-width: 720px; margin: 0 auto; padding: 0; }
 .legal-eyebrow {
     display: inline-block; font-weight: 700; font-size: 14px; letter-spacing: 0.06em;
     text-transform: uppercase; color: #2D738C; margin-bottom: 12px;