/* Sidebar */
#sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  color: var(--text-inverse);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
}
#sidebar .logo {
  padding: 1.25rem;
  font-size: 1.25rem;
  font-weight: 700;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
#sidebar .logo span {
  color: var(--primary-light);
}
#sidebar nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0;
}
#sidebar nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.25rem;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
  cursor: pointer;
  border-left: 3px solid transparent;
}
#sidebar nav a:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}
#sidebar nav a.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-left-color: var(--primary-light);
}
#sidebar .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 1.1rem;
}

/* Topbar */
#topbar {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--topbar-height);
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  z-index: 99;
}
#topbar .page-title {
  font-size: 1.25rem;
  font-weight: 600;
}
#topbar .user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}
#topbar .user-badge {
  background: var(--primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}
#topbar .user-name {
  font-weight: 500;
}
#topbar .notification-btn {
  position: relative;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.25rem;
  color: var(--text-secondary);
  padding: 0.25rem;
}
#topbar .notification-badge {
  position: absolute;
  top: -2px;
  right: -4px;
  width: 16px;
  height: 16px;
  background: var(--danger);
  color: white;
  border-radius: 50%;
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  display: none;
}

/* Main Content */
#main-content {
  margin-left: var(--sidebar-width);
  margin-top: var(--topbar-height);
  padding: 1.5rem;
  min-height: calc(100vh - var(--topbar-height));
}

/* Page Sections */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.page-header .page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}
.page-header .page-actions {
  display: flex;
  gap: 0.75rem;
}

/* Stats Cards Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* Filters Bar */
.filters-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
  padding: 1rem;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}
.filters-bar .filter-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.filters-bar label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.filters-bar select,
.filters-bar input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  background: white;
}
.filters-bar select:focus,
.filters-bar input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Login Page (special fullscreen) */
.login-page {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-sidebar) 0%, #1e3a5f 100%);
  z-index: 200;
}
.login-card {
  background: white;
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
}
.login-card h1 {
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}
.login-card p {
  text-align: center;
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}