/* NEO Regex - Main CSS Styles */
/* 전문적이고 현대적인 디자인 시스템 */

/* =========================
   CSS Variables & Design System
   ========================= */
:root {
  /* Colors - Professional Theme */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;
  
  --color-secondary-500: #06b6d4;
  --color-secondary-600: #0891b2;
  
  --color-accent-500: #f59e0b;
  --color-accent-600: #d97706;
  
  --color-success-500: #10b981;
  --color-success-600: #059669;
  --color-success-700: #065e42;
  
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;
  
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  
  /* Grayscale */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Monaco', 'Consolas', 'Courier New', monospace;
  
  /* Spacing */
  --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;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Z-index */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-modal: 30;
  --z-popover: 40;
  --z-tooltip: 50;
}

/* =========================
   Base Styles
   ========================= */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-gray-900);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.font-inter {
  font-family: var(--font-sans);
}

.font-mono {
  font-family: var(--font-mono);
}

/* =========================
   Container
   ========================= */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* =========================
   Navigation
   ========================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

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

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.nav-logo i {
  font-size: 1.5rem;
  color: var(--color-primary-600);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.beta-badge {
  background: var(--color-accent-500);
  color: white;
  font-size: 0.625rem;
  font-weight: 600;
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: none;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
}

.nav-dropdown {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  color: var(--color-gray-700);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
  cursor: pointer;
}

.nav-link:hover {
  color: var(--color-primary-600);
}

.dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
}

.nav-dropdown:hover .dropdown-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  color: var(--color-gray-700);
  transition: background-color var(--transition-fast);
  border-radius: var(--radius-md);
  margin: var(--space-2);
}

.dropdown-item:hover {
  background: var(--color-gray-50);
  color: var(--color-primary-600);
}

.dropdown-item i {
  font-size: 1.25rem;
  opacity: 0.7;
}

.dropdown-title {
  font-weight: 600;
  font-size: 0.875rem;
}

.dropdown-desc {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  margin-top: 0.125rem;
}

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

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  cursor: pointer;
  padding: var(--space-2);
}

@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }
}

.bar {
  width: 1.5rem;
  height: 2px;
  background: var(--color-gray-600);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

/* =========================
   Buttons
   ========================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-700));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-700), var(--color-primary-800));
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1px solid var(--color-gray-300);
}

.btn-secondary:hover {
  background: var(--color-gray-200);
  color: var(--color-gray-800);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-600);
}

.btn-outline:hover {
  background: var(--color-gray-700);
  color: white;
  transform: translateY(-1px);
}

.btn-beginner {
  background: linear-gradient(135deg, var(--color-success-500), var(--color-success-600));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-beginner:hover {
  background: linear-gradient(135deg, var(--color-success-600), var(--color-success-700));
  transform: translateY(-1px);
}

.btn-expert {
  background: linear-gradient(135deg, #8b5cf6, #7c3aed);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-expert:hover {
  background: linear-gradient(135deg, #7c3aed, #6d28d9);
  transform: translateY(-1px);
}

/* =========================
   Hero Section
   ========================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-24) 0 var(--space-16);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, 
    #667eea 0%, 
    #764ba2 50%, 
    #f093fb 100%);
  opacity: 0.05;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(99, 102, 241, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
}

.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  animation: float 6s ease-in-out infinite;
}

.orb-1 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, var(--color-primary-400), var(--color-secondary-400));
  top: 10%;
  right: 10%;
  animation-delay: 0s;
}

.orb-2 {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-accent-400), var(--color-primary-400));
  bottom: 20%;
  left: 10%;
  animation-delay: 2s;
}

.orb-3 {
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, var(--color-secondary-400), #8b5cf6);
  top: 60%;
  right: 30%;
  animation-delay: 4s;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-16);
  align-items: center;
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (min-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-24);
  }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--space-6);
  color: var(--color-gray-900);
}

@media (min-width: 640px) {
  .hero-title {
    font-size: 4rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 4.5rem;
  }
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-secondary-500));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-gray-600);
  margin-bottom: var(--space-8);
  max-width: 600px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gray-500);
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.feature-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  border: 1px solid var(--color-gray-200);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-gray-700);
}

.feature-pill i {
  color: var(--color-primary-600);
}

/* =========================
   Demo Window
   ========================= */
.hero-demo {
  position: relative;
  z-index: 1;
}

.demo-window {
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
}

.demo-header {
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.demo-controls {
  display: flex;
  gap: var(--space-2);
}

.control {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.control.red { background: #ff5f56; }
.control.yellow { background: #ffbd2e; }
.control.green { background: #27ca3f; }

.demo-title {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-700);
}

.demo-content {
  padding: var(--space-6);
}

.demo-input,
.demo-test {
  margin-bottom: var(--space-4);
}

.input-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.code-input {
  background: var(--color-gray-900);
  color: white;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  border: 1px solid var(--color-gray-700);
}

.regex-delimiter {
  color: var(--color-accent-400);
  font-weight: 600;
}

.regex-pattern {
  color: var(--color-primary-300);
}

.test-text {
  background: var(--color-gray-50);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  border: 1px solid var(--color-gray-200);
}

.match {
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-success-700);
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: 600;
}

.no-match {
  color: var(--color-gray-500);
}

.demo-result {
  margin-top: var(--space-4);
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.result-badge.success {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success-700);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

/* =========================
   Sections
   ========================= */
.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .section-title {
    font-size: 3rem;
  }
}

.section-subtitle {
  font-size: 1.25rem;
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* =========================
   Features Section
   ========================= */
.features {
  padding: var(--space-24) 0;
  background: white;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary-500), var(--color-secondary-500));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
  border-color: var(--color-primary-200);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card.featured {
  border-color: var(--color-primary-300);
  box-shadow: var(--shadow-lg);
}

.feature-card.featured::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-6);
  background: var(--color-primary-50);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary-600);
  transition: all var(--transition-normal);
}

.feature-icon.featured {
  background: var(--color-primary-600);
  color: white;
}

.feature-card:hover .feature-icon {
  background: var(--color-primary-600);
  color: white;
  transform: scale(1.1);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-4);
}

.feature-description {
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  margin-bottom: var(--space-6);
  text-align: left;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  color: var(--color-gray-600);
  font-size: 0.875rem;
}

.feature-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary-500);
  border-radius: 50%;
  flex-shrink: 0;
}

.feature-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-primary-600);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all var(--transition-fast);
}

.feature-link:hover {
  color: var(--color-primary-700);
  gap: var(--space-3);
}

/* =========================
   User Types Section
   ========================= */
.user-types {
  padding: var(--space-24) 0;
  background: var(--color-gray-50);
}

.user-types-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 1024px) {
  .user-types-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.user-type-card {
  background: white;
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.user-type-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  transition: all var(--transition-normal);
}

.user-type-card.beginner::before {
  background: linear-gradient(90deg, var(--color-success-500), #22c55e);
}

.user-type-card.expert::before {
  background: linear-gradient(90deg, #8b5cf6, #7c3aed);
}

.user-type-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.user-type-header {
  margin-bottom: var(--space-8);
}

.user-type-icon {
  width: 5rem;
  height: 5rem;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border-radius: var(--radius-2xl);
  transition: all var(--transition-normal);
}

.user-type-card.beginner .user-type-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--color-success-600);
}

.user-type-card.expert .user-type-icon {
  background: rgba(139, 92, 246, 0.1);
  color: #8b5cf6;
}

.user-type-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.user-type-subtitle {
  color: var(--color-gray-600);
  font-size: 1rem;
}

.user-type-features {
  margin-bottom: var(--space-8);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  color: var(--color-gray-700);
  text-align: left;
}

.feature-item i {
  color: var(--color-primary-600);
  width: 1.25rem;
  flex-shrink: 0;
}

/* =========================
   Stats Section
   ========================= */
.stats-section {
  padding: var(--space-20) 0;
  background: var(--color-gray-900);
  color: white;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-card {
  text-align: center;
  transition: transform var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px);
}

.stat-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto var(--space-4);
  background: rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-primary-400);
}

.stat-label {
  color: var(--color-gray-400);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =========================
   CTA Section
   ========================= */
.cta-section {
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-800));
  color: white;
  text-align: center;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  .cta-title {
    font-size: 3rem;
  }
}

.cta-subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
}

/* =========================
   Footer
   ========================= */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr 2fr;
  }
}

.footer-brand {
  text-align: center;
}

@media (min-width: 768px) {
  .footer-brand {
    text-align: left;
  }
}

.footer-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
  margin-bottom: var(--space-4);
}

@media (min-width: 768px) {
  .footer-logo {
    justify-content: flex-start;
  }
}

.footer-logo i {
  color: var(--color-primary-500);
}

.footer-description {
  color: var(--color-gray-400);
  margin-bottom: var(--space-6);
}

.social-links {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
}

@media (min-width: 768px) {
  .social-links {
    justify-content: flex-start;
  }
}

.social-link {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-gray-800);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-400);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary-600);
  color: white;
  transform: translateY(-2px);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.footer-column {
  text-align: center;
}

@media (min-width: 768px) {
  .footer-column {
    text-align: left;
  }
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: white;
  margin-bottom: var(--space-4);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-link {
  display: block;
  color: var(--color-gray-400);
  text-decoration: none;
  padding: var(--space-1) 0;
  transition: color var(--transition-fast);
  font-size: 0.875rem;
}

.footer-link:hover {
  color: var(--color-primary-400);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-gray-800);
  color: var(--color-gray-500);
  font-size: 0.875rem;
}

/* =========================
   Notification System
   ========================= */
.notification-container {
  position: fixed;
  top: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-tooltip);
  pointer-events: none;
}

.notification {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
  min-width: 300px;
  max-width: 400px;
  pointer-events: auto;
  animation: slideIn 0.3s ease-out;
}

.notification.success {
  border-color: var(--color-success-300);
  background: var(--color-success-50);
}

.notification.error {
  border-color: var(--color-error-300);
  background: var(--color-error-50);
}

.notification.warning {
  border-color: var(--color-warning-300);
  background: var(--color-warning-50);
}

.notification-close {
  background: none;
  border: none;
  color: var(--color-gray-400);
  cursor: pointer;
  padding: var(--space-1);
  margin-left: auto;
  transition: color var(--transition-fast);
}

.notification-close:hover {
  color: var(--color-gray-600);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* =========================
   Utility Classes
   ========================= */
.text-primary { color: var(--color-primary-600); }
.text-green-500 { color: var(--color-success-500); }
.text-purple-500 { color: #8b5cf6; }

.ml-1 { margin-left: var(--space-1); }

/* =========================
   Responsive Design
   ========================= */
@media (max-width: 1023px) {
  .nav-menu {
    position: fixed;
    top: 4rem;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-4);
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  .dropdown-content {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--color-gray-50);
    margin-top: var(--space-2);
  }
}

/* =========================
   Dark Mode Support
   ========================= */
@media (prefers-color-scheme: dark) {
  .dark {
    --color-gray-50: #1f2937;
    --color-gray-100: #374151;
    --color-gray-900: #f9fafb;
  }
}