:root {
  --primary-color: #2563eb;
  --secondary-color: #64748b;
  --accent-color: #06b6d4;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --light-color: #f8fafc;
  --dark-color: #1e293b;
  --ai-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --tech-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --shadow-light: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-heavy: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  overflow-x: hidden;
}

/* AI Tech Animations */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.3); }
  50% { box-shadow: 0 0 40px rgba(6, 182, 212, 0.6); }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

/* Glass Morphism Effects */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
}

.glass-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-heavy);
}

/* AI Tech Buttons */
.btn-ai {
  background: var(--ai-gradient);
  border: none;
  color: white;
  padding: 12px 24px;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn-ai::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-ai:hover::before {
  left: 100%;
}

.btn-ai:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.btn-tech {
  background: var(--tech-gradient);
  border: none;
  color: white;
  padding: 10px 20px;
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: var(--transition);
}

.btn-tech:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(6, 182, 212, 0.3);
}

/* Navigation */
.navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: var(--transition);
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  background: var(--ai-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-color);
  transition: var(--transition);
  transform: translateX(-50%);
}

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

/* Hero Section */
.hero {
  background-image: linear-gradient(135deg, rgba(102,126,234,0.55) 0%, rgba(118,75,162,0.55) 100%), url('https://images.unsplash.com/photo-1504384308090-c894fdcc538d?auto=format&fit=crop&w=1600&q=80');
  background-size: cover;
  background-position: center 30%;
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: white;
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.page-index .hero {
  padding: 100px 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.06)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  animation: float 6s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  background: radial-gradient(800px 400px at 85% 20%, rgba(255,255,255,0.2), transparent 60%), linear-gradient(180deg, rgba(255,255,255,0.08), transparent 40%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  animation: slideInUp 0.8s ease-out;
  text-shadow: 0 2px 10px rgba(0,0,0,0.25);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  animation: slideInUp 0.8s ease-out 0.2s both;
  text-shadow: 0 1px 6px rgba(0,0,0,0.2);
}

@media (max-width: 991.98px) {
  .hero {
    background-attachment: scroll;
    padding: 80px 0;
  }
  .hero h1 {
    font-size: 2.4rem;
  }
}

/* Feature Cards */
.feature-card {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--tech-gradient);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-heavy);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--ai-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  animation: pulse-glow 2s infinite;
}

.feature-icon i {
  font-size: 1.5rem;
  color: white;
}

/* Download Sections */
.download-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 3rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-medium);
  position: relative;
  overflow: hidden;
}

.download-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.1) 0%, transparent 70%);
  animation: float 8s ease-in-out infinite;
}

.download-platform {
  text-align: center;
  padding: 2rem;
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.download-platform:hover {
  background: rgba(6, 182, 212, 0.05);
  transform: translateY(-5px);
}

.platform-icon {
  width: 80px;
  height: 80px;
  background: var(--tech-gradient);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 2rem;
  color: white;
  animation: pulse-glow 3s infinite;
}

/* News Cards */
.news-card {
  background: white;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  height: 100%;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-heavy);
}

.news-image {
  height: 200px;
  background: var(--ai-gradient);
  position: relative;
  overflow: hidden;
}

.news-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, transparent 30%, rgba(255,255,255,0.1) 50%, transparent 70%);
  animation: shimmer 2s infinite;
}

.news-content {
  padding: 1.5rem;
}

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--secondary-color);
}

.news-category {
  background: var(--accent-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Policy Pages */
.policy-section {
  background: white;
  border-radius: var(--border-radius-lg);
  padding: 3rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-light);
}

.policy-nav {
  background: var(--light-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
}

.policy-nav .nav-link {
  color: var(--dark-color);
  padding: 0.75rem 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 0.5rem;
  transition: var(--transition);
}

.policy-nav .nav-link.active,
.policy-nav .nav-link:hover {
  background: var(--accent-color);
  color: white;
}

/* Forms */
.form-control {
  border: 2px solid #e2e8f0;
  border-radius: var(--border-radius);
  padding: 0.75rem 1rem;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 0.2rem rgba(6, 182, 212, 0.25);
}

/* Footer */
.footer {
  background: var(--dark-color);
  color: white;
  padding: 3rem 0 2rem;
  margin-top: 4rem;
}

.footer h5 {
  color: white;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer a {
  color: #ffffff;
  text-decoration: none;
  transition: var(--transition);
}

.footer a.text-muted {
  color: #ffffff !important;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .download-section {
    padding: 2rem;
  }
  
  .policy-section {
    padding: 2rem;
  }
  
  .feature-card {
    padding: 1.5rem;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --light-color: #1e293b;
    --dark-color: #f8fafc;
    --glass-bg: rgba(30, 41, 59, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
  }
  
  body {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: var(--dark-color);
  }
  
  .feature-card,
  .download-section,
  .policy-section {
    background: var(--glass-bg);
    color: var(--dark-color);
  }
  
  .navbar {
    background: rgba(30, 41, 59, 0.95) !important;
  }
}

/* Scroll Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: shimmer 1.5s infinite;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-color);
}