/**
 * News Server - Main Application Styles
 *
 * Mobile-first responsive CSS framework with:
 * - CSS custom properties for theming
 * - Dark mode support
 * - WCAG 2.1 AA accessibility compliance
 * - Responsive breakpoints at 576px, 768px, 992px, 1200px
 */

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */

:root {
  /* Colors - Light mode */
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-secondary: #64748b;
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #06b6d4;

  /* Background colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-elevated: #ffffff;

  /* Text colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;

  /* Border colors */
  --border-primary: #e2e8f0;
  --border-secondary: #cbd5e1;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index layers */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-drawer: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-toast: 600;
  --z-tooltip: 700;

  /* Layout */
  --header-height: 60px;
  --drawer-width: 280px;
  --container-max: 1280px;
  --sidebar-width: 260px;
}

/* Dark mode colors */
.dark-mode {
  --color-primary: #3b82f6;
  --color-primary-hover: #60a5fa;
  --color-primary-light: #1e3a5f;

  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-elevated: #1e293b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;

  --border-primary: #334155;
  --border-secondary: #475569;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Reset & Base Styles
   ======================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ========================================
   Accessibility Utilities
   ======================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: var(--text-inverse);
  padding: var(--space-2) var(--space-4);
  z-index: var(--z-tooltip);
  text-decoration: none;
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) 0;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #0000ff;
    --border-primary: #000000;
    --text-primary: #000000;
    --bg-primary: #ffffff;
  }
}

/* ========================================
   Layout Components — Sidebar + Top Bar
   ======================================== */

.ns-body {
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- Sidebar ---------- */
.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-primary);
  border-right: 1px solid var(--border-primary);
  display: flex;
  flex-direction: column;
  z-index: var(--z-drawer);
  transition: width var(--transition-slow), transform var(--transition-slow);
  overflow: hidden;
}

.app-sidebar.collapsed {
  width: 56px;
}

.app-sidebar.collapsed .sidebar-logo-text,
.app-sidebar.collapsed .sidebar-link-text,
.app-sidebar.collapsed .sidebar-section-label,
.app-sidebar.collapsed .sidebar-user-info {
  display: none;
}

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

.app-sidebar.collapsed .sidebar-link {
  justify-content: center;
  padding: var(--space-2) var(--space-3);
}

.app-sidebar.collapsed .sidebar-header {
  justify-content: center;
  padding: var(--space-3);
}

.app-sidebar.collapsed .sidebar-user {
  justify-content: center;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-primary);
  min-height: var(--header-height);
  flex-shrink: 0;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: var(--text-lg);
}

.sidebar-logo-icon {
  fill: var(--color-primary);
  flex-shrink: 0;
}

.sidebar-logo-text {
  white-space: nowrap;
}

.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
  flex-shrink: 0;
}

.sidebar-collapse-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.sidebar-collapse-btn svg {
  fill: currentColor;
  transition: transform var(--transition-slow);
}

/* Sidebar nav */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) var(--space-2);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar-nav-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar-nav-section + .sidebar-nav-section {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.sidebar-section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  padding: var(--space-1) var(--space-3);
  white-space: nowrap;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

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

.sidebar-link svg {
  fill: currentColor;
  flex-shrink: 0;
}

.sidebar-link-upload {
  color: var(--color-primary);
  font-weight: 600;
}

.sidebar-link-upload:hover {
  background: var(--color-primary-light);
}

/* Sidebar footer / user */
.sidebar-footer {
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-primary);
  flex-shrink: 0;
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.sidebar-user-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  flex-shrink: 0;
}

.sidebar-user-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sidebar-user-name {
  font-weight: 600;
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user-email {
  color: var(--text-secondary);
  font-size: var(--text-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Sidebar overlay (mobile) */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-drawer) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.sidebar-overlay.visible {
  opacity: 1;
  visibility: visible;
}

/* ---------- App wrapper ---------- */
.app-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-width: 0;
  transition: margin-left var(--transition-slow);
}

.app-wrapper-nosidebar {
  margin-left: 0;
}

body:has(.app-sidebar.collapsed) .app-wrapper {
  margin-left: 56px;
}

/* ---------- Top bar ---------- */
.app-topbar {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-primary);
  height: var(--header-height);
  flex-shrink: 0;
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  height: 100%;
  padding: 0 var(--space-4);
}

.topbar-spacer {
  flex: 1;
}

.topbar-breadcrumb {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.topbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.topbar-btn:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.topbar-btn svg {
  fill: currentColor;
}

/* Dark mode icon toggle */
.dm-icon-dark { display: none; }
.dark-mode .dm-icon-light { display: none; }
.dark-mode .dm-icon-dark { display: block; }

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-primary);
  border-radius: var(--radius-md);
}

.mobile-menu-btn svg {
  fill: currentColor;
}

/* ---------- Main content ---------- */
.ns-main {
  flex: 1;
  padding: var(--space-4);
  background: var(--bg-secondary);
}

@media (min-width: 768px) {
  .ns-main {
    padding: var(--space-6);
  }
}

@media (min-width: 992px) {
  .ns-main {
    padding: var(--space-8);
  }
}

/* ---------- Responsive sidebar ---------- */
@media (max-width: 1024px) {
  .app-sidebar {
    width: 56px;
  }

  .app-sidebar .sidebar-logo-text,
  .app-sidebar .sidebar-link-text,
  .app-sidebar .sidebar-section-label,
  .app-sidebar .sidebar-user-info {
    display: none;
  }

  .app-sidebar .sidebar-link {
    justify-content: center;
    padding: var(--space-2) var(--space-3);
  }

  .app-sidebar .sidebar-header {
    justify-content: center;
    padding: var(--space-3);
  }

  .app-sidebar .sidebar-collapse-btn {
    display: none;
  }

  .app-sidebar .sidebar-user {
    justify-content: center;
  }

  .app-wrapper {
    margin-left: 56px;
  }
}

@media (max-width: 768px) {
  .app-sidebar {
    width: var(--sidebar-width);
    transform: translateX(-100%);
  }

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

  .app-sidebar.mobile-open .sidebar-logo-text,
  .app-sidebar.mobile-open .sidebar-link-text,
  .app-sidebar.mobile-open .sidebar-section-label,
  .app-sidebar.mobile-open .sidebar-user-info {
    display: block;
  }

  .app-sidebar.mobile-open .sidebar-link {
    justify-content: flex-start;
    padding: var(--space-2) var(--space-3);
  }

  .app-sidebar.mobile-open .sidebar-header {
    justify-content: space-between;
    padding: var(--space-4);
  }

  .app-sidebar.mobile-open .sidebar-user {
    justify-content: flex-start;
  }

  .app-wrapper {
    margin-left: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

/* ---------- Confirm Modal ---------- */
.ns-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.ns-modal[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
}

.ns-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.ns-modal-dialog {
  position: relative;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 460px;
  margin: var(--space-4);
  overflow: hidden;
}

.ns-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--border-primary);
}

.ns-modal-header h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0;
}

.ns-modal-close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  color: var(--text-tertiary);
  padding: var(--space-1);
  line-height: 1;
}

.ns-modal-close:hover {
  color: var(--text-primary);
}

.ns-modal-body {
  padding: var(--space-4) var(--space-6);
}

.ns-modal-body p {
  margin: 0;
  line-height: var(--leading-relaxed);
}

.ns-modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-primary);
  background: var(--bg-secondary);
}

/* Keep footer/header-inner for backward compat but hide them */
.ns-header, .ns-footer, .nav-drawer, .nav-overlay {
  display: none;
}

/* ========================================
   Navigation Components
   ======================================== */

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

.menu-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  position: relative;
  transition: background var(--transition-fast);
}

.menu-icon::before,
.menu-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition-fast);
}

.menu-icon::before {
  top: -7px;
}

.menu-icon::after {
  top: 7px;
}

.menu-toggle[aria-expanded="true"] .menu-icon {
  background: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-icon::before {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-icon::after {
  transform: translateY(-7px) rotate(-45deg);
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: var(--text-lg);
}

.logo-icon {
  fill: var(--color-primary);
}

.logo-text {
  display: none;
}

@media (min-width: 576px) {
  .logo-text {
    display: inline;
  }
}

/* Desktop navigation */
.desktop-nav {
  display: none;
  gap: var(--space-1);
  margin-left: var(--space-6);
}

@media (min-width: 768px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav-link svg {
  fill: currentColor;
  flex-shrink: 0;
}

/* Mobile drawer navigation */
.nav-drawer {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--drawer-width);
  max-width: 85vw;
  height: 100vh;
  background: var(--bg-primary);
  z-index: var(--z-drawer);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xl);
}

.nav-drawer.open {
  transform: translateX(0);
}

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-primary);
}

.drawer-title {
  font-weight: 600;
  font-size: var(--text-lg);
}

.drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
}

.drawer-close:hover {
  color: var(--text-primary);
}

.drawer-close svg {
  fill: currentColor;
}

.drawer-nav {
  flex: 1;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
}

.drawer-nav .nav-link {
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-4);
}

.drawer-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.drawer-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.user-info {
  display: flex;
  flex-direction: column;
}

.user-name {
  font-weight: 600;
  font-size: var(--text-sm);
}

.user-email {
  color: var(--text-secondary);
  font-size: var(--text-xs);
}

.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-drawer) - 1);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.nav-overlay.visible {
  opacity: 1;
  visibility: visible;
}

@media (min-width: 768px) {
  .nav-drawer,
  .nav-overlay {
    display: none;
  }
}

/* ========================================
   User Menu
   ======================================== */

.header-actions {
  margin-left: auto;
}

.user-menu {
  position: relative;
}

.user-menu-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: background var(--transition-fast);
}

.user-menu-toggle:hover {
  background: var(--bg-secondary);
}

.user-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.chevron {
  fill: var(--text-secondary);
  transition: transform var(--transition-fast);
}

.user-menu-toggle[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 180px;
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.user-dropdown[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown a,
.user-dropdown button {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  color: var(--text-primary);
  text-decoration: none;
  text-align: left;
  background: none;
  border: none;
  font-size: var(--text-sm);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.user-dropdown a:hover,
.user-dropdown button:hover {
  background: var(--bg-secondary);
}

.user-dropdown hr {
  border: none;
  border-top: 1px solid var(--border-primary);
  margin: var(--space-2) 0;
}

.hide-mobile {
  display: none;
}

@media (min-width: 576px) {
  .hide-mobile {
    display: inline;
  }
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 40px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-secondary);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--color-error);
  color: var(--text-inverse);
  border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  min-height: 48px;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  min-height: 32px;
}

.btn-icon {
  padding: var(--space-2);
  min-width: 40px;
}

/* ========================================
   Form Elements
   ======================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--text-primary);
}

.form-label-required::after {
  content: ' *';
  color: var(--color-error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: var(--bg-primary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
  outline: none;
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--bg-tertiary);
  cursor: not-allowed;
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form-help {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.form-error {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-error);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Checkbox and Radio */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check-input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.form-check-label {
  font-size: var(--text-sm);
  cursor: pointer;
}

/* ========================================
   Cards
   ======================================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0;
}

.card-body {
  padding: var(--space-4);
}

.card-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--border-primary);
  background: var(--bg-secondary);
}

/* ========================================
   Tables
   ======================================== */

.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--border-primary);
}

.table th {
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  white-space: nowrap;
}

.table tbody tr:hover {
  background: var(--bg-secondary);
}

.table-responsive {
  display: block;
}

/* Stack table on mobile */
@media (max-width: 767px) {
  .table-stack thead {
    display: none;
  }

  .table-stack tbody tr {
    display: block;
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-primary);
  }

  .table-stack td {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) 0;
    border: none;
  }

  .table-stack td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--text-secondary);
  }
}

/* ========================================
   Toast Notifications
   ======================================== */

.toast-container {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  left: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

@media (min-width: 576px) {
  .toast-container {
    left: auto;
    max-width: 400px;
  }
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in 0.3s ease-out;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast-success .toast-icon {
  fill: var(--color-success);
}

.toast-error .toast-icon {
  fill: var(--color-error);
}

.toast-warning .toast-icon {
  fill: var(--color-warning);
}

.toast-info .toast-icon {
  fill: var(--color-info);
}

.toast-content {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.toast-message {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--space-1);
}

.toast-close:hover {
  color: var(--text-primary);
}

/* ========================================
   Loading States
   ======================================== */

.loading-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}

.dark-mode .loading-overlay {
  background: rgba(15, 23, 42, 0.8);
}

.loading-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-primary);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-secondary) 50%, var(--bg-tertiary) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ========================================
   Utility Classes
   ======================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (min-width: 576px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 992px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
}

/* Flex */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Spacing */
.m-0 { margin: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

/* Text */
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-tertiary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Display */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

@media (max-width: 575px) {
  .hide-xs { display: none; }
}

@media (max-width: 767px) {
  .hide-sm { display: none; }
}

@media (min-width: 768px) {
  .show-md { display: block; }
  .hide-md { display: none; }
}

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-sm { max-width: 24rem; }
.max-w-md { max-width: 28rem; }
.max-w-lg { max-width: 32rem; }
.max-w-xl { max-width: 36rem; }

/* Border */
.border { border: 1px solid var(--border-primary); }
.border-t { border-top: 1px solid var(--border-primary); }
.border-b { border-bottom: 1px solid var(--border-primary); }
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

/* Background */
.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }

/* ========================================
   Entity Styles
   ======================================== */

/* Entity type colors */
:root {
  --entity-person: #ef4444;
  --entity-org: #3b82f6;
  --entity-gpe: #22c55e;
  --entity-loc: #14b8a6;
  --entity-date: #f59e0b;
  --entity-time: #f97316;
  --entity-money: #10b981;
  --entity-percent: #8b5cf6;
  --entity-cardinal: #6366f1;
  --entity-ordinal: #a855f7;
  --entity-quantity: #ec4899;
  --entity-event: #d946ef;
  --entity-product: #06b6d4;
  --entity-work-of-art: #84cc16;
  --entity-law: #64748b;
  --entity-language: #0ea5e9;
  --entity-fac: #78716c;
  --entity-norp: #f43f5e;
}

/* Entity highlight in transcript */
.entity-highlight {
  padding: 0.125rem 0.25rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.entity-highlight:hover {
  opacity: 0.8;
  transform: scale(1.02);
}

.entity-highlight[data-type="PERSON"] { background-color: rgba(239, 68, 68, 0.2); border-bottom: 2px solid var(--entity-person); }
.entity-highlight[data-type="ORG"] { background-color: rgba(59, 130, 246, 0.2); border-bottom: 2px solid var(--entity-org); }
.entity-highlight[data-type="GPE"] { background-color: rgba(34, 197, 94, 0.2); border-bottom: 2px solid var(--entity-gpe); }
.entity-highlight[data-type="LOC"] { background-color: rgba(20, 184, 166, 0.2); border-bottom: 2px solid var(--entity-loc); }
.entity-highlight[data-type="DATE"] { background-color: rgba(245, 158, 11, 0.2); border-bottom: 2px solid var(--entity-date); }
.entity-highlight[data-type="TIME"] { background-color: rgba(249, 115, 22, 0.2); border-bottom: 2px solid var(--entity-time); }
.entity-highlight[data-type="MONEY"] { background-color: rgba(16, 185, 129, 0.2); border-bottom: 2px solid var(--entity-money); }
.entity-highlight[data-type="PERCENT"] { background-color: rgba(139, 92, 246, 0.2); border-bottom: 2px solid var(--entity-percent); }
.entity-highlight[data-type="CARDINAL"] { background-color: rgba(99, 102, 241, 0.2); border-bottom: 2px solid var(--entity-cardinal); }
.entity-highlight[data-type="ORDINAL"] { background-color: rgba(168, 85, 247, 0.2); border-bottom: 2px solid var(--entity-ordinal); }
.entity-highlight[data-type="QUANTITY"] { background-color: rgba(236, 72, 153, 0.2); border-bottom: 2px solid var(--entity-quantity); }
.entity-highlight[data-type="EVENT"] { background-color: rgba(217, 70, 239, 0.2); border-bottom: 2px solid var(--entity-event); }
.entity-highlight[data-type="PRODUCT"] { background-color: rgba(6, 182, 212, 0.2); border-bottom: 2px solid var(--entity-product); }
.entity-highlight[data-type="WORK_OF_ART"] { background-color: rgba(132, 204, 22, 0.2); border-bottom: 2px solid var(--entity-work-of-art); }
.entity-highlight[data-type="LAW"] { background-color: rgba(100, 116, 139, 0.2); border-bottom: 2px solid var(--entity-law); }
.entity-highlight[data-type="LANGUAGE"] { background-color: rgba(14, 165, 233, 0.2); border-bottom: 2px solid var(--entity-language); }
.entity-highlight[data-type="FAC"] { background-color: rgba(120, 113, 108, 0.2); border-bottom: 2px solid var(--entity-fac); }
.entity-highlight[data-type="NORP"] { background-color: rgba(244, 63, 94, 0.2); border-bottom: 2px solid var(--entity-norp); }

/* Entity tooltip */
.entity-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
  z-index: var(--z-tooltip);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  font-size: var(--text-sm);
}

.entity-highlight:hover .entity-tooltip {
  opacity: 1;
  visibility: visible;
}

.entity-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--bg-elevated);
}

.entity-tooltip-type {
  font-weight: 600;
  color: var(--text-primary);
}

.entity-tooltip-normalized {
  color: var(--text-secondary);
  font-size: var(--text-xs);
  margin-top: var(--space-1);
}

/* Entity panel/sidebar */
.entity-panel {
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background-color: var(--bg-elevated);
  overflow: hidden;
}

.entity-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
}

.entity-panel-header h3 {
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0;
}

.entity-panel-count {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  background-color: var(--bg-tertiary);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.entity-panel-filters {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-primary);
  flex-wrap: wrap;
}

.entity-type-filter {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.entity-type-filter:hover {
  transform: scale(1.05);
}

.entity-type-filter.active {
  border-color: currentColor;
}

.entity-type-filter[data-type="PERSON"] { background-color: rgba(239, 68, 68, 0.2); color: var(--entity-person); }
.entity-type-filter[data-type="ORG"] { background-color: rgba(59, 130, 246, 0.2); color: var(--entity-org); }
.entity-type-filter[data-type="GPE"] { background-color: rgba(34, 197, 94, 0.2); color: var(--entity-gpe); }
.entity-type-filter[data-type="LOC"] { background-color: rgba(20, 184, 166, 0.2); color: var(--entity-loc); }
.entity-type-filter[data-type="DATE"] { background-color: rgba(245, 158, 11, 0.2); color: var(--entity-date); }
.entity-type-filter[data-type="TIME"] { background-color: rgba(249, 115, 22, 0.2); color: var(--entity-time); }
.entity-type-filter[data-type="MONEY"] { background-color: rgba(16, 185, 129, 0.2); color: var(--entity-money); }

.entity-type-filter .count {
  display: inline-block;
  margin-left: var(--space-1);
  padding: 0 var(--space-1);
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
}

.entity-panel-list {
  max-height: 400px;
  overflow-y: auto;
}

.entity-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-primary);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.entity-item:hover {
  background-color: var(--bg-secondary);
}

.entity-item:last-child {
  border-bottom: none;
}

.entity-item-type {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.entity-item-type[data-type="PERSON"] { background-color: var(--entity-person); }
.entity-item-type[data-type="ORG"] { background-color: var(--entity-org); }
.entity-item-type[data-type="GPE"] { background-color: var(--entity-gpe); }
.entity-item-type[data-type="LOC"] { background-color: var(--entity-loc); }
.entity-item-type[data-type="DATE"] { background-color: var(--entity-date); }
.entity-item-type[data-type="TIME"] { background-color: var(--entity-time); }
.entity-item-type[data-type="MONEY"] { background-color: var(--entity-money); }
.entity-item-type[data-type="PERCENT"] { background-color: var(--entity-percent); }
.entity-item-type[data-type="CARDINAL"] { background-color: var(--entity-cardinal); }
.entity-item-type[data-type="QUANTITY"] { background-color: var(--entity-quantity); }

.entity-item-content {
  flex: 1;
  min-width: 0;
}

.entity-item-text {
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.entity-item-meta {
  font-size: var(--text-xs);
  color: var(--text-secondary);
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-1);
}

.entity-item-time {
  cursor: pointer;
  color: var(--color-primary);
}

.entity-item-time:hover {
  text-decoration: underline;
}

.entity-item-links {
  flex-shrink: 0;
}

.entity-link-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.entity-link-badge svg {
  width: 12px;
  height: 12px;
}

/* Entity panel cards (sidebar) */
.entity-panel-list .entity-card {
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
}

.entity-panel-list .entity-card:last-child {
  margin-bottom: 0;
}

.entity-type-badge {
  display: inline-block;
  padding: 2px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 10px;
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.entity-mention-count {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-left: auto;
}

.entity-text {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  margin-top: var(--space-1);
  word-break: break-word;
}

.entity-confidence {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-1);
}

/* Loading spinner */
.spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  vertical-align: middle;
  margin-right: var(--space-1);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Entity search page */
.entity-search-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 992px) {
  .entity-search-layout {
    grid-template-columns: 300px 1fr;
  }
}

.entity-search-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.entity-search-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.entity-card {
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: box-shadow var(--transition-fast);
}

.entity-card:hover {
  box-shadow: var(--shadow-md);
}

.entity-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.entity-card-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
}

.entity-card-type {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
}

.entity-card-body {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

.entity-card-normalized {
  margin-top: var(--space-2);
  padding: var(--space-2);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.entity-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-primary);
}

.entity-card-source {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.entity-card-source a {
  color: var(--color-primary);
}

/* KB Admin styles */
.kb-admin-layout {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.kb-entry-form {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .kb-entry-form {
    grid-template-columns: 1fr 1fr;
  }
}

.kb-entry-form .form-group.full-width {
  grid-column: 1 / -1;
}

.kb-aliases-input {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: var(--space-2);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  min-height: 42px;
}

.kb-alias-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}

.kb-alias-tag button {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: var(--text-tertiary);
  line-height: 1;
}

.kb-alias-tag button:hover {
  color: var(--color-error);
}

.kb-aliases-input input {
  flex: 1;
  min-width: 100px;
  border: none;
  outline: none;
  padding: var(--space-1);
  font-size: var(--text-sm);
}

.kb-import-dropzone {
  border: 2px dashed var(--border-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.kb-import-dropzone:hover,
.kb-import-dropzone.dragover {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
}

.kb-import-dropzone svg {
  width: 48px;
  height: 48px;
  color: var(--text-tertiary);
  margin-bottom: var(--space-3);
}

.kb-import-dropzone p {
  color: var(--text-secondary);
  margin: 0;
}

/* ==========================================================================
   Real-time Collaboration Styles
   ========================================================================== */

/* Presence Bar - Shows active collaborators */
.collab-presence {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2);
}

.collab-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 600;
  font-size: var(--text-sm);
  border: 2px solid var(--bg-primary);
  box-shadow: var(--shadow-sm);
  cursor: default;
  transition: transform var(--transition-fast);
}

.collab-avatar:hover {
  transform: scale(1.1);
  z-index: 10;
}

.collab-avatar img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.collab-avatar + .collab-avatar {
  margin-left: -8px;
}

.collab-no-users {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

/* Cursor Indicators on Timeline */
.collab-cursor {
  position: absolute;
  width: 2px;
  height: 100%;
  pointer-events: none;
  z-index: 100;
  transition: left 0.1s ease-out;
}

.collab-cursor::before {
  content: '';
  position: absolute;
  top: 0;
  left: -1px;
  width: 4px;
  height: 100%;
  background-color: currentColor;
  opacity: 0.3;
}

.collab-cursor-label {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: white;
  font-size: 10px;
  white-space: nowrap;
  pointer-events: auto;
}

/* Selection Highlight */
.collab-selection {
  position: absolute;
  height: 100%;
  opacity: 0.2;
  pointer-events: none;
  z-index: 50;
}

/* Comment Markers */
.collab-comment-marker {
  position: absolute;
  width: 12px;
  height: 12px;
  background-color: var(--color-warning);
  border-radius: 50%;
  cursor: pointer;
  transform: translateX(-50%);
  z-index: 60;
  transition: transform var(--transition-fast);
}

.collab-comment-marker:hover {
  transform: translateX(-50%) scale(1.3);
}

.collab-comment-marker::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid var(--color-warning);
  transform: translateX(-50%);
}

/* Comments Panel */
.collab-comments {
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-secondary);
  border-left: 1px solid var(--border-primary);
}

.collab-comments-header {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-primary);
}

.collab-comments-header h3 {
  margin: 0;
  font-size: var(--text-base);
  font-weight: 600;
}

.collab-comments-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2);
}

.collab-comment-item {
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  margin-bottom: var(--space-2);
}

.collab-comment-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-1);
}

.collab-comment-author {
  font-weight: 600;
  font-size: var(--text-sm);
}

.collab-comment-time {
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
}

.collab-comment-text {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.collab-comment-form {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border-primary);
}

.collab-comment-input {
  flex: 1;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.collab-comment-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.collab-comment-submit {
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-primary);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.collab-comment-submit:hover {
  background-color: var(--color-primary-dark);
}

/* Edit Notification Toast */
.collab-edit-toast {
  position: fixed;
  bottom: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-4);
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  font-size: var(--text-sm);
  z-index: 1000;
  animation: collab-toast-in 0.3s ease-out;
}

@keyframes collab-toast-in {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* Collaboration Status Indicator */
.collab-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
}

.collab-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.collab-status.connected .collab-status-dot {
  background-color: var(--color-success);
}

.collab-status.disconnected .collab-status-dot {
  background-color: var(--color-error);
}

.collab-status.reconnecting .collab-status-dot {
  background-color: var(--color-warning);
  animation: collab-pulse 1s infinite;
}

@keyframes collab-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .collab-comments {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-width: 320px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 1000;
  }

  .collab-comments.open {
    transform: translateX(0);
  }

  .collab-avatar {
    width: 28px;
    height: 28px;
    font-size: var(--text-xs);
  }
}

/* ==========================================================================
   Analytics Dashboard Styles
   ========================================================================== */

.analytics-dashboard {
  padding: var(--space-4);
  max-width: 1400px;
  margin: 0 auto;
}

.analytics-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.analytics-header h1 {
  margin: 0;
  font-size: var(--text-2xl);
  font-weight: 700;
}

.analytics-controls {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.analytics-select {
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: var(--text-sm);
}

/* Summary Cards */
.analytics-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.analytics-card {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.analytics-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.analytics-card.loading .analytics-card-value {
  animation: analytics-pulse 1.5s infinite;
}

@keyframes analytics-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.analytics-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary-light);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.analytics-card-content {
  display: flex;
  flex-direction: column;
}

.analytics-card-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
}

.analytics-card-label {
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* Charts */
.analytics-charts {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.analytics-chart-container {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.analytics-chart-container h3 {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: 600;
}

.analytics-chart-container canvas {
  width: 100% !important;
  height: 250px !important;
}

/* Tables */
.analytics-tables {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.analytics-table-container {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.analytics-table-container h3 {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: 600;
}

.analytics-table {
  overflow-x: auto;
}

.analytics-table table {
  width: 100%;
  border-collapse: collapse;
}

.analytics-table th,
.analytics-table td {
  padding: var(--space-2) var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--border-primary);
}

.analytics-table th {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.analytics-table td {
  font-size: var(--text-sm);
}

.analytics-table .truncate {
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Activity Feed */
.analytics-activity {
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.analytics-activity h3 {
  margin: 0 0 var(--space-4) 0;
  font-size: var(--text-lg);
  font-weight: 600;
}

.analytics-feed {
  max-height: 400px;
  overflow-y: auto;
}

.activity-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border-primary);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: var(--bg-tertiary);
  border-radius: 50%;
  color: var(--text-secondary);
}

.activity-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.activity-type {
  font-size: var(--text-sm);
  font-weight: 500;
}

.activity-resource {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

.activity-time {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 992px) {
  .analytics-charts {
    grid-template-columns: 1fr;
  }

  .analytics-tables {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .analytics-header {
    flex-direction: column;
    gap: var(--space-3);
    align-items: flex-start;
  }

  .analytics-controls {
    width: 100%;
  }

  .analytics-select {
    flex: 1;
  }

  .analytics-summary {
    grid-template-columns: 1fr 1fr;
  }

  .analytics-card {
    padding: var(--space-3);
  }

  .analytics-card-icon {
    width: 40px;
    height: 40px;
  }

  .analytics-card-value {
    font-size: var(--text-xl);
  }
}