@media (min-width: 900px) {
  .akte-grid {
    grid-template-columns: 2fr 1fr;
    grid-template-areas:
      "kopf kopf"
      "aktionen aktionen"
      "stamm wartung"
      "beladung pruefungen"
      "verantwortlich maengel"
      "dokumente dokumente"
      "historie historie";
  }

  .akte-grid.ist-fahrzeug {
    grid-template-areas:
      "kopf kopf"
      "aktionen aktionen"
      "wartung stamm"
      "pruefungen beladung"
      "maengel verantwortlich"
      "dokumente dokumente"
      "notizen notizen"
      "historie historie";
  }
}

@media (max-width: 768px) {
  .split-layout {
    flex-direction: column;
  }

  .split-layout-sidebar,
  .split-layout-sidebar-sm {
    width: 100%;
    flex: 1 1 auto;
  }

  .page-wide {
    padding: 1.25rem 1rem 2rem;
  }

  /* Sidebar -> horizontale Topbar zurückklappen (Mobile-Durchgang) */
  .app-shell {
    flex-direction: column;
  }

  .topbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: auto;
    flex: 0 0 auto;
    height: auto;
    position: sticky;
    padding: 0.6rem 0.9rem;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .topbar-nav {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.15rem;
  }

  .topbar-nav a {
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
  }

  h1 {
    font-size: 1.35rem;
  }

  .row {
    flex-wrap: wrap;
  }
}