/* Globale Variablen für einfachere Wartung */
:host {
  --sidebar-width-expanded: 280px;
  --sidebar-width-collapsed: 96px;
  --sidebar-padding: 1rem;
  --sidebar-margin: 1rem;
  --transition-speed: 0.35s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 1. Der Sidebar-Container */
.sidebar {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: var(--sidebar-width-expanded);
  height: calc(100vh - (var(--sidebar-margin) * 2));
  margin: var(--sidebar-margin);
  padding: var(--sidebar-padding);
  background-color: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 1rem;
  transition: width var(--transition-speed) var(--transition-ease);
}

/* 2. Der Header-Bereich */
.sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  height: auto;
}

.sidebar-logo {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  color: #111827;
}

.sidebar-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 600;
  white-space: nowrap;
  clip-path: inset(0 0% 0 0);
  transition: clip-path var(--transition-speed) var(--transition-ease);
}

/* 3. Navigation und Footer */
.sidebar-nav {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.sidebar-footer {
  margin-top: auto;
}
.nav-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  text-decoration: none;
  font-weight: 500;
  color: #4b5563;
  white-space: nowrap;
  transition: background-color 0.2s, color 0.2s;
  overflow: hidden;
  position: relative; 
}
.nav-item:hover {
  background-color: #f3f4f6;
}
.nav-item.active {
  background-color: #3b82f6;
  color: #fff;
}
.nav-item app-icon {
  font-size: 1.25rem;
  width: 32px;
  flex-shrink: 0;
  position: relative;
  z-index: 2;
  /* NEU: Fester Start-Hintergrund (Farbe der Sidebar) statt 'inherit' */
  background-color: #fff; 
  /* NEU: Fügt eine sanfte Transition für den Farbwechsel hinzu */
  transition: background-color 0.2s; 
}
.nav-item span {
  white-space: nowrap;
  clip-path: inset(0 0 0 0);
  margin-left: 0.75rem;
  transition: clip-path 0.3s var(--transition-ease),
    margin-left 0.3s var(--transition-ease);
  position: relative;
  z-index: 1;
}

/* 4. Positionierung des Toggle-Buttons */
.sidebar-toggle-btn {
  position: absolute;
  border-radius: 50%;
  top: calc(var(--sidebar-padding) + 4px);
  right: var(--sidebar-padding);
  transform: rotate(180deg);
  transition: top var(--transition-speed) var(--transition-ease),
    right var(--transition-speed) var(--transition-ease),
    transform var(--transition-speed) var(--transition-ease),
    box-shadow var(--transition-speed) var(--transition-ease);
}

/* 5. Stile für den eingeklappten Zustand (.collapsed) */
.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
}

.sidebar.collapsed .sidebar-title {
  clip-path: inset(0 100% 0 0);
  pointer-events: none;
}

.sidebar.collapsed .nav-item span {
  clip-path: inset(0 100% 0 0);
  margin-left: -20px;
  pointer-events: none;
  
}

.sidebar.collapsed .sidebar-toggle-btn {
  right: -18px;
  transform: rotate(0deg);
}

.nav-item:hover app-icon {
  background-color: #f3f4f6; /* Derselbe Hintergrund wie .nav-item:hover */
}
.nav-item.active app-icon {
  background-color: #3b82f6; /* Derselbe Hintergrund wie .nav-item.active */
}