/* =====================================================
   ARIA - Sovereign Autonomous Intelligence
   Main Stylesheet - Defense-Grade Aesthetic
   ===================================================== */

/* =====================================================
   CSS VARIABLES & THEME
   ===================================================== */
:root {
  /* Primary Colors */
  --bg-primary: #0A0F1F;
  --bg-secondary: #0D1325;
  --bg-tertiary: #14213D;
  --bg-card: #111827;
  --bg-card-hover: #1a2744;

  /* Text Colors */
  --text-primary: #F0F0F0;
  --text-secondary: #A0AEC0;
  --text-muted: #718096;

  /* Accent Colors */
  --accent-primary: #00AEEF;
  --accent-secondary: #0077B6;
  --accent-glow: rgba(0, 174, 239, 0.3);
  --accent-success: #10B981;
  --accent-warning: #F59E0B;
  --accent-danger: #EF4444;

  /* Borders */
  --border-color: #1E3A5F;
  --border-light: #2D4A6F;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0A0F1F 0%, #14213D 50%, #0D1325 100%);
  --gradient-card: linear-gradient(180deg, #111827 0%, #0D1325 100%);
  --gradient-accent: linear-gradient(90deg, #00AEEF 0%, #0077B6 100%);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(0, 174, 239, 0.2);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', 'Fira Code', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* Layout */
  --max-width: 1400px;
  --sidebar-width: 280px;
  --navbar-height: 70px;
}

/* Light Theme Override */
[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #F1F5F9;
  --bg-tertiary: #E2E8F0;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFC;

  --text-primary: #1E293B;
  --text-secondary: #475569;
  --text-muted: #64748B;

  --border-color: #CBD5E1;
  --border-light: #E2E8F0;

  --gradient-hero: linear-gradient(135deg, #F8FAFC 0%, #E2E8F0 50%, #F1F5F9 100%);
  --gradient-card: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

/* =====================================================
   RESET & BASE
   ===================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
}

code, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code {
  background: var(--bg-tertiary);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  background: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid var(--border-color);
}

pre code {
  background: none;
  padding: 0;
}

/* =====================================================
   NAVIGATION
   ===================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--navbar-height);
  background: rgba(10, 15, 31, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background var(--transition-base);
}

.navbar-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

.navbar-brand .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  list-style: none;
}

.nav-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

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

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

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-sm);
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* =====================================================
   SIDEBAR
   ===================================================== */
.sidebar {
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--navbar-height));
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-xl);
  overflow-y: auto;
  z-index: 100;
  transition: transform var(--transition-base);
}

.sidebar-nav {
  list-style: none;
}

.sidebar-section {
  margin-bottom: var(--spacing-xl);
}

.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-xs);
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

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

.sidebar-link.active {
  color: var(--accent-primary);
  border-left: 2px solid var(--accent-primary);
}

/* =====================================================
   MAIN CONTENT
   ===================================================== */
.main-content {
  margin-top: var(--navbar-height);
  min-height: calc(100vh - var(--navbar-height));
}

.main-content.with-sidebar {
  margin-left: var(--sidebar-width);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-xl);
}

.container-narrow {
  max-width: 900px;
}

/* =====================================================
   HERO SECTION
   ===================================================== */
.hero {
  background: var(--gradient-hero);
  padding: var(--spacing-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(0, 174, 239, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 119, 182, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero-badge .status-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: var(--spacing-2xl);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* =====================================================
   BUTTONS
   ===================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 174, 239, 0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

.btn-outline {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
  background: var(--accent-primary);
  color: #fff;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.85rem;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-2xl);
  font-size: 1.1rem;
}

/* =====================================================
   CARDS
   ===================================================== */
.card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--accent-primary);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

/* =====================================================
   STATS
   ===================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-mono);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =====================================================
   SECTION STYLING
   ===================================================== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--spacing-2xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-md);
}

.section-header p {
  font-size: 1.1rem;
}

/* =====================================================
   STATUS MODULE
   ===================================================== */
.status-module {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-2xl) 0;
}

.status-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.status-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.1rem;
  font-weight: 600;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--accent-success);
  border-radius: 50px;
  color: var(--accent-success);
  font-size: 0.85rem;
  font-weight: 500;
}

.status-charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.chart-container {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
}

.chart-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chart-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-mono);
}

.chart-bar {
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.chart-fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 4px;
  transition: width 1s ease;
}

/* =====================================================
   TABLES
   ===================================================== */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

tr:hover td {
  background: var(--bg-card-hover);
}

/* =====================================================
   DIAGRAMS & IMAGES
   ===================================================== */
.diagram-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  text-align: center;
}

.diagram-container img,
.diagram-container svg {
  max-width: 100%;
  height: auto;
}

.diagram-caption {
  margin-top: var(--spacing-md);
  font-size: 0.9rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Image Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 2000;
  padding: var(--spacing-xl);
  cursor: pointer;
}

.lightbox.active {
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.lightbox img {
  max-width: 95%;
  max-height: 95vh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-primary);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* =====================================================
   TIMELINE / ROADMAP
   ===================================================== */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-color);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-2xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -32px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--accent-primary);
  border-radius: 50%;
  border: 3px solid var(--bg-primary);
}

.timeline-item.completed::before {
  background: var(--accent-success);
}

.timeline-item.current::before {
  background: var(--accent-primary);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.timeline-date {
  font-size: 0.85rem;
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-mono);
}

.timeline-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.timeline-content {
  color: var(--text-secondary);
}

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-2xl) 0;
  margin-top: auto;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
}

.footer-brand {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: 0.1em;
}

.footer-tagline {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  max-width: var(--max-width);
  margin: var(--spacing-2xl) auto 0;
  padding: var(--spacing-lg) var(--spacing-xl) 0;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-social {
  display: flex;
  gap: var(--spacing-md);
}

.footer-social a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-social a:hover {
  color: var(--accent-primary);
}

/* =====================================================
   ANIMATIONS
   ===================================================== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease forwards;
}

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* =====================================================
   UTILITIES
   ===================================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-primary); }

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-card { background: var(--bg-card); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.py-1 { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-2 { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-3 { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }
.py-4 { padding-top: var(--spacing-xl); padding-bottom: var(--spacing-xl); }
.py-5 { padding-top: var(--spacing-2xl); padding-bottom: var(--spacing-2xl); }

.d-flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }
.gap-4 { gap: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }

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

  .main-content.with-sidebar {
    margin-left: 0;
  }

  .navbar-nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: block;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 3rem;
  }

  .hero {
    padding: var(--spacing-2xl) 0;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-actions {
    flex-direction: column;
  }

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

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

  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-value {
    font-size: 2rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* =====================================================
   PRINT STYLES
   ===================================================== */
@media print {
  .navbar,
  .sidebar,
  .footer,
  .theme-toggle,
  .mobile-menu-toggle {
    display: none !important;
  }

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

  body {
    background: #fff;
    color: #000;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}