/* =============================================================================
   CLOSE AI - Design System
   Inspired by Alloy's modern fintech UI
   ============================================================================= */

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

:root {
  /* Primary Colors - Blue (Alloy-inspired) */
  --primary-50: #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --primary-800: #3730a3;
  --primary-900: #312e81;

  /* Aliases */
  --primary: var(--primary-500);
  --primary-dark: var(--primary-600);
  --primary-light: var(--primary-400);
  --primary-hover: var(--primary-600);

  /* Success - Green */
  --success-50: #ecfdf5;
  --success-100: #d1fae5;
  --success-200: #a7f3d0;
  --success-300: #6ee7b7;
  --success-400: #34d399;
  --success-500: #10b981;
  --success-600: #059669;
  --success-700: #047857;
  --success: var(--success-500);

  /* Warning - Amber */
  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-200: #fde68a;
  --warning-300: #fcd34d;
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --warning-700: #b45309;
  --warning: var(--warning-500);

  /* Danger - Red */
  --danger-50: #fef2f2;
  --danger-100: #fee2e2;
  --danger-200: #fecaca;
  --danger-300: #fca5a5;
  --danger-400: #f87171;
  --danger-500: #ef4444;
  --danger-600: #dc2626;
  --danger-700: #b91c1c;
  --danger: var(--danger-500);

  /* Info - Cyan */
  --info-50: #ecfeff;
  --info-100: #cffafe;
  --info-200: #a5f3fc;
  --info-300: #67e8f9;
  --info-400: #22d3ee;
  --info-500: #06b6d4;
  --info-600: #0891b2;
  --info: var(--info-500);

  /* Neutrals - Gray */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --gray-950: #030712;

  /* Semantic Color Aliases - for pages that use these names */
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-700);
  --text-tertiary: var(--gray-500);
  --text-muted: var(--gray-400);
  --bg-primary: white;
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --border-primary: var(--gray-200);
  --border-secondary: var(--gray-100);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Cabinet Grotesk', 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Monaco', 'Consolas', monospace;

  /* Font Sizes */
  --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;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* Spacing */
  --space-0: 0;
  --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;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* Focus Ring */
  --ring-color: var(--primary-200);
  --ring-offset: 2px;
  --ring-width: 3px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Layout */
  --sidebar-width: 260px;
  --sidebar-width-collapsed: 72px;
  --header-height: 64px;
  --container-max: 1280px;
}

/* -----------------------------------------------------------------------------
   Reset & Base Styles
   ----------------------------------------------------------------------------- */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--gray-900);
  background: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* -----------------------------------------------------------------------------
   Typography
   ----------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--gray-900);
}

.page-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-4);
}

.text-muted {
  color: var(--gray-500);
}

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

.text-xs {
  font-size: var(--text-xs);
}

/* -----------------------------------------------------------------------------
   Layout Components
   ----------------------------------------------------------------------------- */

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: white;
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: width var(--transition-base);
}

.sidebar-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--gray-100);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-extrabold);
  color: var(--gray-900);
  letter-spacing: -0.02em;
}

/* Navigation */
.nav-section {
  padding: var(--space-4) 0;
}

.nav-section-title {
  padding: var(--space-2) var(--space-6);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  color: var(--gray-600);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  margin: var(--space-1) 0;
}

.nav-item:hover {
  background: var(--gray-50);
  color: var(--gray-900);
}

.nav-item.active {
  background: var(--primary-50);
  color: var(--primary-600);
  border-left-color: var(--primary-500);
  font-weight: var(--font-semibold);
}

.nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-lg);
  flex-shrink: 0;
}

.nav-badge {
  margin-left: auto;
  min-width: 20px;
  height: 20px;
  padding: 0 var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-500);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-bold);
  border-radius: var(--radius-full);
}

.nav-badge.warning {
  background: var(--warning-500);
}

.nav-badge.danger {
  background: var(--danger-500);
}

/* Sidebar Navigation Container - Scrollable */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
}

/* User Section / Sidebar Footer - Fixed at bottom */
.user-section,
.sidebar-footer {
  flex-shrink: 0;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--gray-200);
  background: white;
}

.user-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-3);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--primary-600);
  overflow: hidden;
  flex-shrink: 0;
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--gray-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-email {
  font-size: var(--text-xs);
  color: var(--gray-500);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Mobile Header - Hidden on desktop, shown on mobile */
.mobile-header {
  display: none;
}

/* Sidebar Overlay - Hidden by default */
.sidebar-overlay {
  display: none;
}

/* Main Content */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-5) var(--space-8) var(--space-5) var(--space-10);
  position: sticky;
  top: 0;
  z-index: 50;
}

/* Page Header */
.page-header {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  padding: var(--space-6) var(--space-8) var(--space-6) var(--space-10);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-left {
  flex: 1;
}

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

/* Content Area */
.content {
  flex: 1;
  padding: var(--space-6) var(--space-8) var(--space-6) var(--space-10);
}

.content-area {
  flex: 1;
  padding: var(--space-6) var(--space-8) var(--space-6) var(--space-10);
}

/* -----------------------------------------------------------------------------
   Cards
   ----------------------------------------------------------------------------- */

.card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.card:hover {
  border-color: var(--gray-300);
  box-shadow: var(--shadow-md);
}

.card-clickable {
  cursor: pointer;
}

.card-clickable:hover {
  border-color: var(--primary-300);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--gray-100);
}

.card-body {
  padding: var(--space-5) var(--space-6);
}

.card-footer {
  padding: var(--space-4) var(--space-6);
  background: var(--gray-50);
  border-top: 1px solid var(--gray-100);
}

/* Stat Cards */
.stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-5) var(--space-6);
  transition: all var(--transition-fast);
}

.stat-card:hover {
  border-color: var(--gray-300);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.stat-icon.primary { background: var(--primary-100); }
.stat-icon.success { background: var(--success-100); }
.stat-icon.warning { background: var(--warning-100); }
.stat-icon.danger { background: var(--danger-100); }
.stat-icon.info { background: var(--info-100); }

.stat-label {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-extrabold);
  color: var(--gray-900);
  letter-spacing: -0.02em;
  line-height: var(--leading-none);
  margin-bottom: var(--space-2);
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
}

.stat-change.positive { color: var(--success-600); }
.stat-change.negative { color: var(--danger-600); }
.stat-change.neutral { color: var(--gray-500); }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

/* Button Sizes */
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  border-radius: var(--radius-xl);
}

.btn-xl {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}

/* Button Variants */
.btn-primary {
  background: var(--primary-500);
  color: white;
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

.btn-success {
  background: var(--success-500);
  color: white;
}

.btn-success:hover:not(:disabled) {
  background: var(--success-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.btn-danger {
  background: var(--danger-500);
  color: white;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.4);
}

.btn-warning {
  background: var(--warning-500);
  color: white;
}

.btn-warning:hover:not(:disabled) {
  background: var(--warning-600);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
}

/* Claude AI branded button - Anthropic's brand color */
.btn-claude {
  background: linear-gradient(135deg, #D4A574 0%, #C4956A 100%);
  color: #1a1a1a;
  font-weight: 600;
  border: 1px solid rgba(0, 0, 0, 0.1);
}

.btn-claude:hover:not(:disabled) {
  background: linear-gradient(135deg, #C4956A 0%, #B4855A 100%);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(212, 165, 116, 0.5);
}

.btn-claude svg {
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.btn-ghost {
  background: transparent;
  color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--gray-100);
  color: var(--gray-900);
}

.btn-link {
  background: transparent;
  color: var(--primary-500);
  padding: 0;
}

.btn-link:hover:not(:disabled) {
  color: var(--primary-600);
  text-decoration: underline;
}

/* Icon Button */
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-lg);
}

.btn-icon.btn-sm {
  width: 28px;
  height: 28px;
}

.btn-icon.btn-lg {
  width: 44px;
  height: 44px;
}

/* Button Group */
.btn-group {
  display: inline-flex;
  gap: 0;
}

.btn-group .btn {
  border-radius: 0;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

/* Pill Buttons (Alloy-style) */
.btn-pill {
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
}

/* -----------------------------------------------------------------------------
   Badges & Pills
   ----------------------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  line-height: var(--leading-tight);
}

.badge-primary {
  background: var(--primary-100);
  color: var(--primary-700);
}

.badge-success {
  background: var(--success-100);
  color: var(--success-700);
}

.badge-warning {
  background: var(--warning-100);
  color: var(--warning-700);
}

.badge-danger {
  background: var(--danger-100);
  color: var(--danger-700);
}

.badge-info {
  background: var(--info-100);
  color: var(--info-700);
}

.badge-gray {
  background: var(--gray-100);
  color: var(--gray-700);
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
}

.status-badge.sent,
.status-badge.approved,
.status-badge.completed {
  background: var(--success-100);
  color: var(--success-700);
}

.status-badge.pending,
.status-badge.in-progress {
  background: var(--warning-100);
  color: var(--warning-700);
}

.status-badge.rejected,
.status-badge.failed {
  background: var(--danger-100);
  color: var(--danger-700);
}

.status-badge.draft,
.status-badge.new {
  background: var(--info-100);
  color: var(--info-700);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: currentColor;
}

/* -----------------------------------------------------------------------------
   Form Elements
   ----------------------------------------------------------------------------- */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--gray-900);
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 var(--ring-width) var(--ring-color);
}

.form-input::placeholder {
  color: var(--gray-400);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
  line-height: var(--leading-relaxed);
}

.form-help {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--gray-500);
}

.form-error {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--danger-500);
}

/* Search Input */
.search-wrapper {
  position: relative;
}

.search-input {
  padding-left: var(--space-10);
}

.search-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--gray-400);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.search-box {
  position: relative;
}

.search-box .search-icon {
  width: 18px;
  height: 18px;
}

.search-box .search-input {
  padding-left: var(--space-10);
}

/* -----------------------------------------------------------------------------
   Tables
   ----------------------------------------------------------------------------- */

.table-wrapper {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}

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

.table th,
.table td {
  padding: var(--space-4) var(--space-6);
  text-align: left;
}

.table th {
  background: var(--gray-50);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--gray-200);
}

.table td {
  font-size: var(--text-sm);
  color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
  background: var(--gray-50);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* -----------------------------------------------------------------------------
   Modals
   ----------------------------------------------------------------------------- */

.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: white;
  border-radius: var(--radius-2xl);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  animation: modalSlideIn 0.2s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-lg { max-width: 800px; }
.modal-xl { max-width: 1000px; }
.modal-full { max-width: calc(100vw - 48px); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--gray-200);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--gray-900);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gray-100);
  border: none;
  border-radius: var(--radius-lg);
  color: var(--gray-500);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--gray-200);
  color: var(--gray-700);
}

.modal-body {
  padding: var(--space-6);
  overflow-y: auto;
  max-height: calc(90vh - 140px);
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
}

/* -----------------------------------------------------------------------------
   Loading States
   ----------------------------------------------------------------------------- */

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary-500);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--gray-500);
}

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

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

.skeleton-text {
  height: 14px;
  width: 60%;
  margin-bottom: var(--space-2);
}

.skeleton-title {
  height: 20px;
  width: 40%;
  margin-bottom: var(--space-4);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* -----------------------------------------------------------------------------
   Empty States
   ----------------------------------------------------------------------------- */

.empty-state {
  text-align: center;
  padding: var(--space-16) var(--space-8);
}

.empty-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-4);
  opacity: 0.3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-icon svg {
  width: 100%;
  height: 100%;
}

.empty-title {
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.empty-description {
  font-size: var(--text-sm);
  color: var(--gray-500);
  max-width: 400px;
  margin: 0 auto var(--space-6);
}

/* -----------------------------------------------------------------------------
   Alerts
   ----------------------------------------------------------------------------- */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
}

.alert-icon {
  font-size: var(--text-xl);
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

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

.alert-info {
  background: var(--info-50);
  border: 1px solid var(--info-200);
  color: var(--info-700);
}

.alert-success {
  background: var(--success-50);
  border: 1px solid var(--success-200);
  color: var(--success-700);
}

.alert-warning {
  background: var(--warning-50);
  border: 1px solid var(--warning-200);
  color: var(--warning-700);
}

.alert-danger {
  background: var(--danger-50);
  border: 1px solid var(--danger-200);
  color: var(--danger-700);
}

/* -----------------------------------------------------------------------------
   Avatar Stack (Alloy-style)
   ----------------------------------------------------------------------------- */

.avatar-stack {
  display: flex;
  align-items: center;
}

.avatar-stack .user-avatar {
  margin-left: -8px;
  border: 2px solid white;
}

.avatar-stack .user-avatar:first-child {
  margin-left: 0;
}

.avatar-count {
  margin-left: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--gray-600);
}

/* -----------------------------------------------------------------------------
   Progress Bars
   ----------------------------------------------------------------------------- */

.progress {
  height: 6px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary-500);
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.progress-bar.success { background: var(--success-500); }
.progress-bar.warning { background: var(--warning-500); }
.progress-bar.danger { background: var(--danger-500); }

/* -----------------------------------------------------------------------------
   Sparklines
   ----------------------------------------------------------------------------- */

.sparkline {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 24px;
}

.sparkline-bar {
  width: 4px;
  background: var(--primary-400);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.sparkline-bar.positive { background: var(--success-400); }
.sparkline-bar.negative { background: var(--danger-400); }

/* -----------------------------------------------------------------------------
   Utility Classes
   ----------------------------------------------------------------------------- */

/* Flexbox */
.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; }
.flex-1 { flex: 1; }
.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); }
.gap-8 { gap: var(--space-8); }

/* Grid */
.grid { display: grid; }
.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); }

/* Spacing */
.m-0 { margin: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

/* Text */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Colors */
.text-primary { color: var(--primary-500); }
.text-success { color: var(--success-500); }
.text-warning { color: var(--warning-500); }
.text-danger { color: var(--danger-500); }
.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-900 { color: var(--gray-900); }

.bg-primary-50 { background: var(--primary-50); }
.bg-success-50 { background: var(--success-50); }
.bg-warning-50 { background: var(--warning-50); }
.bg-danger-50 { background: var(--danger-50); }

/* Borders */
.border { border: 1px solid var(--gray-200); }
.border-t { border-top: 1px solid var(--gray-200); }
.border-b { border-bottom: 1px solid var(--gray-200); }
.rounded { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

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

/* Width/Height */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.sticky { position: sticky; }
.top-0 { top: 0; }

/* Z-index */
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }
.z-100 { z-index: 100; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Transitions */
.transition { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* -----------------------------------------------------------------------------
   Responsive Utilities
   ----------------------------------------------------------------------------- */

/* Tablet - 1024px and below */
@media (max-width: 1024px) {
  .lg-hidden { display: none; }

  .page-header-content {
    flex-direction: column;
    gap: var(--space-4);
    align-items: flex-start;
  }

  .page-actions {
    flex-wrap: wrap;
    width: 100%;
  }

  .page-actions .btn {
    flex: 1;
    min-width: 140px;
  }
}

/* Mobile - 768px and below */
@media (max-width: 768px) {
  /* Sidebar - Hidden by default, slide in */
  .sidebar {
    position: fixed;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    z-index: 1000;
    box-shadow: var(--shadow-xl);
  }

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

  /* Overlay when sidebar is open */
  .sidebar-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

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

  /* Main content - Full width */
  .main-content {
    margin-left: 0;
  }

  /* Mobile header - Always visible */
  .mobile-header {
    display: flex;
    position: sticky;
    top: 0;
    z-index: 100;
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: var(--space-3) var(--space-4);
    align-items: center;
    gap: var(--space-3);
  }

  .mobile-menu-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-menu-btn svg {
    width: 24px;
    height: 24px;
    color: var(--gray-700);
  }

  .mobile-menu-btn.active {
    background: var(--surface-elevated);
    color: var(--primary-color);
  }

  .mobile-menu-btn.active svg {
    color: var(--primary-color);
  }

  .mobile-signout-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    color: var(--text-secondary);
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
    margin-left: auto;
  }

  .mobile-signout-btn svg {
    width: 20px;
    height: 20px;
  }

  .mobile-signout-btn:hover {
    background: var(--gray-200);
    color: var(--text-primary);
  }

  /* Page header adjustments */
  .page-header {
    padding: var(--space-4);
  }

  .page-title {
    font-size: var(--text-xl);
  }

  .page-subtitle {
    font-size: var(--text-sm);
  }

  .page-header-content {
    flex-direction: column;
    gap: var(--space-3);
    align-items: stretch;
  }

  .page-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .page-actions .btn {
    font-size: var(--text-sm);
    padding: var(--space-2) var(--space-3);
    justify-content: center;
  }

  /* Stats grid - 2 columns on mobile */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-3);
  }

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

  .stat-value {
    font-size: var(--text-2xl);
  }

  /* Content area */
  .content,
  .content-area {
    padding: var(--space-4);
  }

  /* Cards */
  .card {
    padding: var(--space-4);
  }

  .card-header {
    flex-direction: column;
    gap: var(--space-2);
    align-items: flex-start;
  }

  /* Forms */
  .form-row {
    flex-direction: column;
  }

  .form-input,
  .form-select,
  .form-textarea {
    font-size: 16px; /* Prevents iOS zoom on focus */
  }

  /* Buttons - Larger touch targets */
  .btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
  }

  .btn-sm {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }

  /* Search bar */
  .search-filter-bar {
    flex-direction: column;
    gap: var(--space-3);
  }

  .search-box {
    width: 100%;
  }

  .search-filter-bar .btn {
    width: 100%;
  }

  /* Filter tabs - Scrollable */
  .filter-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: var(--space-2);
    padding-bottom: var(--space-2);
  }

  .filter-tabs::-webkit-scrollbar {
    display: none;
  }

  .filter-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }

  /* Quick stats - Horizontal scroll */
  .quick-stats {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: var(--space-4);
    padding-bottom: var(--space-2);
  }

  .quick-stat {
    flex-shrink: 0;
    min-width: 80px;
  }

  /* Tables - Card view on mobile */
  .table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Modal - Full screen on mobile */
  .modal {
    width: 100%;
    max-width: 100%;
    height: 100%;
    max-height: 100%;
    border-radius: 0;
    margin: 0;
  }

  .modal-body {
    max-height: calc(100vh - 140px);
  }

  /* Empty state */
  .empty-state {
    padding: var(--space-8) var(--space-4);
  }

  /* Hide classes */
  .md-hidden { display: none !important; }
  .md-block { display: block !important; }
  .md-flex { display: flex !important; }
  .md-flex-col { flex-direction: column !important; }
}

/* Small mobile - 480px and below */
@media (max-width: 480px) {
  /* Stats - Single column */
  .stats-grid {
    grid-template-columns: 1fr;
  }

  /* Page actions - Stack vertically */
  .page-actions {
    grid-template-columns: 1fr;
  }

  .page-actions .btn {
    width: 100%;
  }

  /* Stat card - Horizontal layout */
  .stat-card {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .stat-icon {
    order: 2;
  }

  .stat-content {
    order: 1;
  }

  /* Modal footer */
  .modal-footer {
    flex-direction: column;
    gap: var(--space-2);
  }

  .modal-footer .btn {
    width: 100%;
  }

  /* Badge */
  .badge {
    font-size: 10px;
    padding: var(--space-1) var(--space-2);
  }

  /* Text sizing */
  .page-title {
    font-size: var(--text-lg);
  }

  /* Show mobile sign-out button on mobile */
  .mobile-signout-btn {
    display: flex !important;
  }

  /* Hide classes */
  .sm-hidden { display: none !important; }
  .sm-block { display: block !important; }
  .sm-flex { display: flex !important; }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets */
  .btn, .nav-item, .filter-tab {
    min-height: 44px;
  }

  /* Remove hover effects that don't work well on touch */
  .btn:hover {
    transform: none;
  }

  .card:hover {
    transform: none;
  }

  /* Active states instead */
  .btn:active {
    transform: scale(0.98);
    opacity: 0.9;
  }

  .nav-item:active {
    background: var(--primary-100);
  }
}

/* Safe area insets for notched phones */
@supports (padding: max(0px)) {
  .mobile-header {
    padding-left: max(var(--space-4), env(safe-area-inset-left));
    padding-right: max(var(--space-4), env(safe-area-inset-right));
  }

  .sidebar {
    padding-bottom: max(var(--space-6), env(safe-area-inset-bottom));
  }

  .modal-footer {
    padding-bottom: max(var(--space-4), env(safe-area-inset-bottom));
  }
}

/* Landscape phone */
@media (max-width: 896px) and (orientation: landscape) {
  .modal {
    max-height: 100vh;
  }

  .modal-body {
    max-height: calc(100vh - 120px);
  }
}

/* =============================================================================
   ENHANCED MOBILE OPTIMIZATIONS
   Applied globally to all pages for consistent mobile experience
   ============================================================================= */

/* Mobile-specific form improvements */
@media (max-width: 768px) {
  /* Form inputs - Prevent iOS zoom on focus */
  input[type="text"],
  input[type="email"],
  input[type="tel"],
  input[type="number"],
  input[type="password"],
  input[type="search"],
  input[type="url"],
  select,
  textarea {
    font-size: 16px !important;
    min-height: 48px;
  }

  /* Form textareas */
  textarea {
    min-height: 100px;
  }

  /* Improved touch targets for all buttons */
  button,
  .btn,
  a.btn {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
  }

  /* Smaller button variants still need minimum touch size */
  .btn-sm {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }

  /* Form labels with better spacing */
  .form-label,
  label {
    margin-bottom: var(--space-2);
    font-size: 14px;
  }

  /* Form hints more readable */
  .form-hint,
  .form-help {
    font-size: 13px;
    line-height: 1.5;
    margin-top: var(--space-2);
  }

  /* Alert boxes better mobile layout */
  .alert {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }

  .alert-icon {
    flex-shrink: 0;
  }

  /* Cards full-width with less padding */
  .card,
  .settings-card,
  .calibrate-card,
  .approval-card {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }

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

  /* Page header mobile improvements */
  .page-header-content {
    gap: var(--space-4);
  }

  /* Preset buttons wrap properly */
  .presets {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .preset-btn {
    flex: 1 1 calc(50% - 4px);
    min-width: 80px;
    text-align: center;
    padding: 10px 12px;
    font-size: 13px;
  }

  /* Current settings box */
  .current-settings {
    padding: 14px;
  }

  .current-settings h4 {
    font-size: 12px;
  }

  .current-settings p {
    font-size: 13px;
  }

  /* Instructions card mobile */
  .instructions-card {
    padding: 16px;
  }

  .instructions-card h3 {
    font-size: 16px;
    flex-wrap: wrap;
  }

  .instructions-card ol {
    margin-left: 20px;
    font-size: 14px;
  }

  /* Prompt template mobile */
  .prompt-template {
    padding: 14px;
    font-size: 12px;
  }

  .copy-btn {
    padding: 8px 12px;
    font-size: 11px;
  }

  /* Step badges */
  .step-badge {
    width: 24px;
    height: 24px;
    font-size: 12px;
    margin-right: 10px;
  }

  .step-title {
    font-size: 15px;
  }

  /* Quick stat cards stacked */
  .quick-stat {
    padding: var(--space-3) var(--space-4);
  }

  .quick-stat-icon {
    width: 40px;
    height: 40px;
  }

  .quick-stat-value {
    font-size: var(--text-xl);
  }

  .quick-stat-label {
    font-size: 11px;
  }
}

/* Small mobile - 480px and below additional enhancements */
@media (max-width: 480px) {
  /* Even more compact on very small screens */
  .page-header {
    padding: var(--space-3);
  }

  .content,
  .content-area {
    padding: var(--space-3);
  }

  /* Preset buttons single column on small phones */
  .preset-btn {
    flex: 1 1 100%;
  }

  /* Card body even more compact */
  .card,
  .settings-card,
  .calibrate-card,
  .approval-card {
    padding: var(--space-3);
  }

  /* Buttons stack in footer */
  .card-footer {
    flex-direction: column;
    gap: var(--space-2);
  }

  .card-footer .btn {
    width: 100%;
    justify-content: center;
  }

  /* Form groups tighter spacing */
  .form-group {
    margin-bottom: var(--space-4);
  }

  /* Step titles more compact */
  .step-title {
    font-size: 14px;
  }
}

/* Print styles - hide mobile-only elements */
@media print {
  .mobile-header,
  .sidebar-overlay,
  .mobile-menu-btn {
    display: none !important;
  }

  .sidebar {
    display: none !important;
  }

  .main-content {
    margin-left: 0 !important;
  }
}