/* B1 Prufung — Global site navigation */
.site-nav {
  background: #fff;
  padding: 0 16px;
  display: flex;
  justify-content: center;
  direction: ltr;
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: 0 1px 6px rgba(0,0,0,.06);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  color: #6b7280;
  text-decoration: none;
  padding: 10px 13px;
  font-size: .77em;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
  font-family: 'Inter', -apple-system, sans-serif;
  white-space: nowrap;
  display: block;
}
.site-nav a:hover { color: #111827; background: #f8fafc; }
.site-nav a.current { color: #dc2626; border-bottom-color: #dc2626; }