/* Modern, sophisticated CSS for ai-xi.pw with dark theme and neon accents */
:root {
  --primary-color: #7928CA;
  --secondary-color: #FF0080;
  --text-color: #ffffff;
  --dark-bg: #111111;
  --darker-bg: #080808;
  --card-bg: #1a1a1a;
  --border-radius: 8px;
  --neon-shadow: 0 0 10px rgba(255, 0, 128, 0.7);
  --gradient: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.3s ease;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

/* Header */
.header {
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all 0.3s ease;
}

.header-scrolled {
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  background-color: rgba(10, 10, 10, 0.95);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo svg {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  gap: 30px;
}

.nav-link {
  font-weight: 500;
  position: relative;
  padding: 5px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background: var(--gradient);
  transition: width 0.3s ease;
}

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

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
}

/* Hero Section */
.hero {
  height: 100vh;
  min-height: 700px;
  background: var(--darker-bg);
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(121, 40, 202, 0.3), transparent 70%);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at bottom left, rgba(255, 0, 128, 0.3), transparent 70%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-title {
  font-size: 4rem;
  font-weight: 900;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: 40px;
  opacity: 0.8;
}

.btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: var(--neon-shadow);
}

.btn-primary:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(255, 0, 128, 0.4);
}

.highlight {
  color: var(--secondary-color);
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 60px;
}

.feature-card {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: var(--border-radius);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.feature-description {
  color: rgba(255, 255, 255, 0.7);
}

/* Process Section */
.process {
  background-color: var(--darker-bg);
  position: relative;
  overflow: hidden;
}

.process::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(121, 40, 202, 0.3), transparent);
  top: -100px;
  left: -100px;
  border-radius: 50%;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  text-align: center;
}

.section-subtitle {
  text-align: center;
  margin-bottom: 60px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 30px;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 30px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
}

.step-content {
  background-color: var(--card-bg);
  padding: 25px;
  border-radius: var(--border-radius);
  border: 1px solid rgba(255, 255, 255, 0.05);
  flex-grow: 1;
}

.step-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-description {
  color: rgba(255, 255, 255, 0.7);
}

/* CTA Section */
.cta {
  text-align: center;
  padding: 100px 0;
  background-color: var(--dark-bg);
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 0, 128, 0.2), transparent);
  bottom: -200px;
  right: -200px;
  border-radius: 50%;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 20px;
}

.cta-subtitle {
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.7);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Footer */
.footer {
  background-color: var(--darker-bg);
  padding: 80px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}

.footer-branding svg {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
}

.footer-description {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 20px;
  max-width: 400px;
}

.footer-heading {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--gradient);
}

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

.footer-link {
  margin-bottom: 10px;
}

.footer-link a {
  color: rgba(255, 255, 255, 0.7);
}

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

.copyright {
  text-align: center;
  padding-top: 40px;
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 992px) {
  .section {
    padding: 60px 0;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .footer-branding {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .step {
    flex-direction: column;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-branding {
    grid-column: span 1;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate {
  animation: fadeIn 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* Glow effect on hover */
.glow-on-hover {
  transition: all 0.3s ease;
}

.glow-on-hover:hover {
  text-shadow: 0 0 10px var(--secondary-color);
}