/* Sidebar Styles */
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  z-index: 100;
  display: flex; flex-direction: column;
  transition: width var(--transition-normal);
  overflow: hidden;
}
.sidebar.collapsed { width: var(--sidebar-collapsed); }

.sidebar-brand {
  height: var(--header-height);
  display: flex; align-items: center;
  padding: 0 var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  gap: var(--space-sm);
  flex-shrink: 0;
}
.brand-logo {
  width: 36px; height: 36px; flex-shrink: 0;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: var(--font-bold);
  color: #fff;
}
.brand-text {
  font-size: var(--text-lg); font-weight: var(--font-bold);
  color: #fff; white-space: nowrap;
  transition: opacity var(--transition-fast);
}
.sidebar.collapsed .brand-text { opacity: 0; width: 0; }

.sidebar-nav { flex: 1; overflow-y: auto; padding: var(--space-md) var(--space-sm); }
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

.nav-section { margin-bottom: var(--space-md); }
.nav-section-title {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.1em;
  color: rgba(199,210,254,0.4); padding: var(--space-sm) var(--space-md);
  font-weight: var(--font-semibold); white-space: nowrap;
}
.sidebar.collapsed .nav-section-title { text-align: center; font-size: 0; }
.sidebar.collapsed .nav-section-title::after { content: '•••'; font-size: 8px; }

.nav-item {
  display: flex; align-items: center; gap: var(--space-md);
  padding: 10px var(--space-md);
  border-radius: var(--radius-md);
  color: var(--sidebar-text);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  white-space: nowrap;
  position: relative;
}
.nav-item:hover { background: var(--sidebar-hover); color: #fff; }
.nav-item.active { background: var(--sidebar-active); color: var(--sidebar-text-active); }
.nav-item .icon { font-size: 1.2rem; flex-shrink: 0; width: 24px; text-align: center; }
.nav-item .text { transition: opacity var(--transition-fast); }
.sidebar.collapsed .nav-item .text { opacity: 0; width: 0; overflow: hidden; }
.nav-item .nav-badge {
  margin-left: auto;
  background: var(--error-color);
  color: #fff;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: var(--font-semibold);
}
.sidebar.collapsed .nav-item .nav-badge { display: none; }

/* Tooltip on collapsed */
.sidebar.collapsed .nav-item::after {
  content: attr(data-tooltip);
  position: absolute; left: calc(100% + 12px); top: 50%;
  transform: translateY(-50%);
  background: var(--text-primary);
  color: #fff;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: 200;
}
.sidebar.collapsed .nav-item:hover::after { opacity: 1; }

.sidebar-footer {
  padding: var(--space-md);
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}
.sidebar-user {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}
.sidebar-user:hover { background: var(--sidebar-hover); }
.sidebar-user-info { overflow: hidden; }
.sidebar-user-name { font-size: var(--text-sm); font-weight: var(--font-semibold); color: #fff; }
.sidebar-user-role { font-size: var(--text-xs); color: var(--sidebar-text); }
.sidebar.collapsed .sidebar-user-info { display: none; }

/* Mobile overlay */
.sidebar-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 99;
  display: none;
}
@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.mobile-open { transform: translateX(0); }
  .sidebar.mobile-open + .sidebar-overlay { display: block; }
}