/* Meta Tech - Custom Theme & Glassmorphism Design System */

@import url('https://fonts.googleapis.com/css2?family=Clash+Display:wght@400;500;600;700&family=Satoshi:wght@400;500;700&display=swap');

:root {
  /* Color System - Blue to Deep Purple Gradient */
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #7c3aed;
  --accent: #a855f7;
  --accent-light: #c084fc;
  
  /* Glassmorphism Colors */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: rgba(0, 0, 0, 0.1);
  
  /* Text Colors */
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  
  /* Background */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  
  /* Light Mode */
  --light-bg: #f8fafc;
  --light-text: #1e293b;
  --light-text-secondary: #475569;
  --light-glass-bg: rgba(255, 255, 255, 0.7);
  --light-glass-border: rgba(148, 163, 184, 0.2);
  
  /* Effects */
  --blur-sm: 8px;
  --blur-md: 16px;
  --blur-lg: 24px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Light Mode Variables */
body.light-mode {
  --bg-primary: #f8fafc;
  --bg-secondary: #e2e8f0;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --glass-bg: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(148, 163, 184, 0.2);
  --glass-shadow: rgba(0, 0, 0, 0.05);
}

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

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

/* Background Gradient Animation */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(168, 85, 247, 0.08) 0%, transparent 50%);
  z-index: -1;
  animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

body.light-mode::before {
  background: 
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.08) 0%, transparent 50%);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Clash Display', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }

p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Glassmorphism Components */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--glass-border);
  box-shadow: 0 8px 32px var(--glass-shadow);
}

.glass-strong {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(var(--blur-lg));
  -webkit-backdrop-filter: blur(var(--blur-lg));
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.glass-subtle {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(var(--blur-sm));
  -webkit-backdrop-filter: blur(var(--blur-sm));
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Buttons */
.btn {
  padding: 0.875rem 2rem;
  border-radius: 0.75rem;
  font-weight: 500;
  font-size: 1rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
  font-family: 'Satoshi', sans-serif;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
}

.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

/* Cards */
.card {
  border-radius: 1.25rem;
  padding: 2rem;
  transition: all var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}

.card-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--glass-border);
}

/* Navigation */
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
  padding: 0.5rem 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width var(--transition-base);
}

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

.nav-link:hover::after {
  width: 100%;
}

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

.nav-link.active::after {
  width: 100%;
}

/* Dropdown Menu */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  margin-top: 0.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-lg));
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  padding: 0.5rem;
  opacity: 0;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.dropdown:hover .dropdown-content {
  display: block;
  opacity: 1;
  transform: translateY(0);
  animation: slideDown 0.3s ease;
}

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

.dropdown-content a {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all var(--transition-fast);
  font-size: 0.9375rem;
}

.dropdown-content a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  transform: translateX(4px);
}

/* Section Styles */
.section {
  padding: 5rem 0;
}

.section-title {
  margin-bottom: 3rem;
  text-align: center;
}

.section-title h2 {
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title p {
  max-width: 600px;
  margin: 0 auto;
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

/* Gradient Text */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Badge */
.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--glass-border);
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* Icon Styles */
.icon {
  width: 1.5rem;
  height: 1.5rem;
  display: inline-block;
}

/* Theme Toggle */
.theme-toggle {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-md));
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: rotate(180deg);
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Responsive */
@media (max-width: 768px) {
  .section {
    padding: 3rem 0;
  }
  
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
  
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.5rem; }
}

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

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

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

/* Feature Icons */
.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

/* Hover Glow Effect */
.glow-on-hover {
  position: relative;
  transition: all var(--transition-base);
}

.glow-on-hover::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  opacity: 0;
  z-index: -1;
  filter: blur(20px);
  transition: opacity var(--transition-base);
}

.glow-on-hover:hover::before {
  opacity: 0.5;
}