.sidebar {
  width: var(--sidebar-width);
  /* Deep navy glass — same feel as the Lumina reference */
  background: linear-gradient(180deg, #0f1d3a 0%, #0b1326 100%);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-right: 1px solid rgba(82, 113, 255, 0.15);
  color: #c2c6d6;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden; /* nur die Menüliste scrollt (siehe .sidebar-nav) */
  transition: width var(--sidebar-transition);
  position: relative;
  z-index: 200;
  box-shadow: 4px 0 32px rgba(0, 0, 0, 0.5);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

/* ── Header ── */
.sidebar-header {
  padding: 0 1rem;
  border-bottom: 1px solid rgba(82, 113, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar-brand-link {
  display: flex;
  align-items: center;
  text-decoration: none;
  overflow: hidden;
  flex: 1;
  min-width: 0;
}

.sidebar-logo {
  height: 36px;
  width: auto;
  display: block;
  flex-shrink: 0;
  transition: opacity var(--sidebar-transition);
}

.sidebar-logo-icon {
  height: 32px;
  width: 32px;
  display: none;
  flex-shrink: 0;
  border-radius: 8px;
  background: rgba(82, 113, 255, 0.2);
  padding: 4px;
}

.sidebar.collapsed .sidebar-logo { display: none; }
.sidebar.collapsed .sidebar-logo-icon { display: block; }

.sidebar-header-actions {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-left: 0.25rem;
}

/* ── Collapse button ── */
.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  color: rgba(194, 198, 214, 0.4);
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: background .15s, color .15s, transform var(--sidebar-transition);
  flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
  background: rgba(82, 113, 255, 0.2);
  color: #fff;
}

.sidebar.collapsed .sidebar-collapse-btn {
  transform: rotate(180deg);
}

.sidebar-close {
  background: none;
  border: none;
  color: rgba(194, 198, 214, 0.4);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.sidebar-close:hover { color: #fff; }

/* ── Navigation ── */
.sidebar-nav {
  padding: 0.5rem 0.625rem 1rem;
  flex: 1;
  min-height: 0;
  overflow-x: hidden;
  /* Menü separat scrollbar, ohne sichtbaren Scrollbalken; Scrollen geht nicht auf die Seite über */
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.sidebar-nav::-webkit-scrollbar {
  display: none;
}

/* Desktop: Seitenleiste bleibt beim Scrollen der Seite stehen */
@media (min-width: 768px) {
  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    align-self: flex-start;
  }
}

.nav-group-toggle {
  width: 100%;
  padding: 0.7rem 0.5rem 0.7rem 0.75rem;
  margin: 0.2rem 0 0;
  font-size: 0.63rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: rgba(194, 198, 214, 0.55);
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background .15s, color .15s;
}

.nav-group-toggle:hover {
  background: rgba(82, 113, 255, 0.1);
  color: rgba(194, 198, 214, 0.85);
}

.nav-group-label-text { transition: opacity var(--sidebar-transition); }
.nav-group-label-dot {
  display: none;
  width: 20px;
  height: 1px;
  background: rgba(194, 198, 214, 0.12);
  flex-shrink: 0;
}

.nav-group-chevron {
  font-size: 0.7rem;
  flex-shrink: 0;
  transition: transform .2s ease;
}

.nav-group.open .nav-group-chevron { transform: rotate(90deg); }

/* ── Collapsible group body (grid-rows trick = animatable auto-height) ── */
.nav-group-items {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .2s ease;
}

.nav-group.open .nav-group-items { grid-template-rows: 1fr; }

.nav-group-items-inner {
  overflow: hidden;
  min-height: 0;
}

.sidebar.collapsed .nav-group-toggle { padding: 1rem 0 0.3rem; justify-content: center; pointer-events: none; cursor: default; }
.sidebar.collapsed .nav-group-toggle:hover { background: none; color: rgba(194, 198, 214, 0.55); }
.sidebar.collapsed .nav-group-label-text { display: none; }
.sidebar.collapsed .nav-group-label-dot { display: block; }
.sidebar.collapsed .nav-group-chevron { display: none; }
.sidebar.collapsed .nav-group-items { grid-template-rows: 1fr; }

/* ── Nav links — rounded pill style ── */
.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.55rem 0.75rem;
  color: #a0a8c0;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: background .18s, color .18s, border-color .18s, box-shadow .18s,
              padding var(--sidebar-transition);
  margin: 2px 0;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-nav .nav-link:hover {
  background: rgba(82, 113, 255, 0.12);
  border-color: rgba(82, 113, 255, 0.15);
  color: #dae2fd;
}

/* ── Active — solid blue fill with glow ── */
.sidebar-nav .nav-link.active {
  background: rgba(82, 113, 255, 0.3);
  border-color: rgba(82, 113, 255, 0.4);
  color: #ffffff;
  box-shadow:
    0 0 20px rgba(82, 113, 255, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.sidebar-nav .nav-icon {
  font-size: 1.05rem;
  width: 1.25rem;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-nav .nav-link.active .nav-icon {
  color: #7b93ff;
}

.nav-label {
  transition: opacity var(--sidebar-transition);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Collapsed nav ── */
.sidebar.collapsed .sidebar-nav {
  padding: 0.5rem 0.375rem 1rem;
}

.sidebar.collapsed .sidebar-nav .nav-link {
  padding: 0.6rem 0;
  justify-content: center;
  gap: 0;
  border-radius: 10px;
}

.sidebar.collapsed .sidebar-nav .nav-link.active {
  background: rgba(82, 113, 255, 0.3);
  border-color: rgba(82, 113, 255, 0.4);
  box-shadow: 0 0 20px rgba(82, 113, 255, 0.35);
}

.sidebar.collapsed .nav-label { display: none; }

/* ── Footer ── */
.sidebar-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid rgba(82, 113, 255, 0.1);
  font-size: 0.72rem;
  color: rgba(194, 198, 214, 0.25);
  text-align: center;
  letter-spacing: .05em;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-footer-icon { display: none; font-size: 1rem; }
.sidebar.collapsed .sidebar-footer-text { display: none; }
.sidebar.collapsed .sidebar-footer-icon { display: block; }

.sidebar.no-transition,
.sidebar.no-transition * { transition: none !important; }

/* ── Mobile overlay ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 999;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.25s;
}

.sidebar-overlay.visible {
  display: block;
  opacity: 1;
}

/* ── Responsive ── */
@media (max-width: 767px) {
  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1000;
    transform: translateX(-100%);
    width: var(--sidebar-width) !important;
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .sidebar.open {
    transform: translateX(0);
  }
}

@media (min-width: 768px) {
  .sidebar-toggle {
    display: none;
  }
}

/* Verwalterei-Wortmarke (Entscheid 29) */
.sidebar-wortmarke {
  color: var(--brand-white);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 36px;
  white-space: nowrap;
}