/* ==========================================================================
   BrightAI Design System - Sidebar Component (Linear & Stripe Inspired)
   ========================================================================== */

.sidebar {
  width: 260px;
  height: 100vh;
  position: fixed;
  top: 0;
  inset-inline-start: 0;
  background-color: var(--color-surface);
  border-inline-end: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  transition: var(--transition-normal);
  z-index: 900;
}

/* Sidebar Brand Header */
.sidebar-header {
  height: 70px;
  display: flex;
  align-items: center;
  padding: 0 var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  color: var(--color-primary);
  font-size: var(--font-size-md);
  text-decoration: none;
}

/* Sidebar Navigation Items */
.sidebar-nav {
  flex-grow: 1;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  overflow-y: auto;
  list-style: none;
}

.sidebar-link {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: var(--transition-fast);
  gap: var(--spacing-sm);
}

.sidebar-link:hover {
  background-color: var(--color-surface-hover);
  color: var(--text-primary);
}

.sidebar-link.is-active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

/* Sub-items / Section Headers */
.sidebar-title {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-top: var(--spacing-md);
}

/* --- COLLAPSIBLE SIDEBAR STATE --- */

.sidebar-collapsed {
  width: 72px;
}

.sidebar-collapsed .sidebar-header {
  justify-content: center;
  padding: 0;
}

.sidebar-collapsed .sidebar-logo span,
.sidebar-collapsed .sidebar-link span,
.sidebar-collapsed .sidebar-title {
  display: none !important;
}

.sidebar-collapsed .sidebar-link {
  justify-content: center;
  padding: var(--spacing-sm);
}

/* Responsive sidebar layouts */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  [dir="rtl"] .sidebar {
    transform: translateX(100%);
  }
  
  .sidebar.is-mobile-active {
    transform: translateX(0) !important;
  }
}