/*
 * App-Rahmen. Desktop (≥ 1024 px): Hauptmenü links, Untermenü horizontal im Hauptfenster.
 * Mobil/Tablet hochkant: Hauptmenü als untere Leiste, Untermenü als horizontal scrollbare Tab-Leiste.
 */
.shell { min-height: 100vh; display: flex; flex-direction: column-reverse; }

/* --- Hauptmenü (mobil: unten) --- */
.sidebar { position: sticky; bottom: 0; z-index: 10; background: var(--color-bg); border-top: 1px solid var(--color-border); }
.brand { display: none; }
.mainnav ul { display: flex; margin: 0; padding: 0; list-style: none; overflow-x: auto; }
.mainnav li { flex: 1 0 auto; }
.mainnav a {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 56px; padding: 0 var(--space-4);
  color: var(--color-text); text-decoration: none; font-weight: 500; border-top: 3px solid transparent;
}
.mainnav a[aria-current="page"] { border-top-color: var(--color-primary); color: var(--color-primary-strong); font-weight: 600; background: var(--color-primary-tint); }
.mainnav a:hover { background: var(--color-surface); }

/* --- Hauptfenster --- */
.main-col { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { padding: var(--space-5) var(--space-4) var(--space-3); }
.topbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); }
.topbar h1 { margin: 0; }
.userbox { display: flex; align-items: center; gap: var(--space-3); margin: 0; }

.subnav { border-bottom: 1px solid var(--color-border); padding: 0 var(--space-4); }
.subnav ul { display: flex; gap: var(--space-5); margin: 0; padding: 0; list-style: none; overflow-x: auto; }
.subnav a {
  display: block; padding: var(--space-3) 0; min-height: var(--hit-target-min);
  color: var(--color-text-muted); text-decoration: none; white-space: nowrap; border-bottom: 3px solid transparent; margin-bottom: -1px;
}
.subnav a[aria-current="page"] { color: var(--color-primary-strong); font-weight: 600; border-bottom-color: var(--color-primary); }
.subnav a:hover { color: var(--color-text); }

.content { padding: var(--space-5) var(--space-4) var(--space-7); max-width: 1200px; width: 100%; }

/* --- Desktop --- */
@media (min-width: 1024px) {
  .shell { flex-direction: row; }
  .sidebar {
    position: sticky; top: 0; align-self: flex-start; height: 100vh;
    width: var(--sidebar-width); flex: 0 0 var(--sidebar-width);
    border-top: 0; border-right: 1px solid var(--color-border); background: var(--color-surface);
  }
  .brand { display: block; padding: var(--space-5) var(--space-5) var(--space-4); }
  .brand-name { font-weight: 700; font-size: 1.125rem; color: var(--color-primary-strong); }
  .brand-name span { font-weight: 400; color: var(--color-text); }
  .mainnav ul { flex-direction: column; overflow: visible; }
  .mainnav a {
    justify-content: flex-start; min-height: var(--hit-target-min); padding: 0 var(--space-5);
    border-top: 0; border-left: 3px solid transparent;
  }
  .mainnav a[aria-current="page"] { border-left-color: var(--color-primary); }
  .topbar { padding: var(--space-6) var(--space-6) var(--space-3); }
  .subnav { padding: 0 var(--space-6); }
  .content { padding: var(--space-5) var(--space-6) var(--space-8); }
}

/* Praxis-Logo */
.brand-logo { display: block; max-width: 100%; max-height: 56px; width: auto; height: auto; }