/* Modern Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --secondary-dark: #db2777;
  --accent: #14b8a6;
  --accent-dark: #0d9488;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  
  /* Neutral Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(102, 126, 234, 0.4);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--text-primary);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

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

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

/* Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-sm) 0;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 80%;
  height: 2px;
  background: var(--gradient-primary);
  transition: transform var(--transition-normal);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-links a.active {
  color: var(--text-primary);
  background: rgba(102, 126, 234, 0.1);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-2xl) var(--spacing-lg);
  background: var(--gradient-hero);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 50px 50px;
  animation: moveBackground 20s linear infinite;
}

@keyframes moveBackground {
  0% { transform: translate(0, 0); }
  100% { transform: translate(50px, 50px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: var(--spacing-xl);
  color: rgba(255, 255, 255, 0.9);
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.cta-button {
  display: inline-block;
  padding: var(--spacing-md) var(--spacing-xl);
  background: white;
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
  color: var(--primary-dark);
}

/* Section Styles */
section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

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

.section-header p {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-glow);
  border-color: rgba(102, 126, 234, 0.3);
}

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

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--text-muted);
  font-size: 1rem;
}

/* FAQ Accordion */
.faq-container {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  border-color: rgba(102, 126, 234, 0.3);
}

.faq-question {
  padding: var(--spacing-md) var(--spacing-lg);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.faq-question:hover {
  color: var(--primary-light);
}

.faq-icon {
  font-size: 1.5rem;
  transition: transform var(--transition-normal);
  color: var(--primary-light);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.faq-answer-content {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--text-secondary);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* Content Sections */
.content-section {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.content-section h3 {
  color: var(--primary-light);
  margin-bottom: var(--spacing-md);
}

.content-section ul {
  list-style: none;
  padding-left: 0;
}

.content-section li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-lg);
  position: relative;
  color: var(--text-secondary);
}

.content-section li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-light);
  font-weight: bold;
}

/* Footer */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  list-style: none;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.copyright {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.8s ease;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-lg);
    gap: var(--spacing-sm);
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-links.active {
    transform: translateX(0);
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .hero {
    min-height: 80vh;
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .nav-container {
    padding: 0 var(--spacing-sm);
  }
}