/* Root Variables */
:root {
  /* Light Theme Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-primary: #1a1a1a;
  --text-secondary: #6b7280;
  --accent-primary: #3b82f6;
  --accent-secondary: #a855f7;
  --accent-tertiary: #06b6d4;
  --border-color: #e5e7eb;
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.dark {
  /* Dark Theme Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --accent-primary: #3b82f6;
  --accent-secondary: #a855f7;
  --accent-tertiary: #06b6d4;
  --border-color: #334155;
  --glass-bg: rgba(0, 0, 0, 0.25);
  --glass-border: rgba(59, 130, 246, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.3);
}

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

html {
  font-size: 16px;
}

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

/* Prevent flash of unstyled content */
/* Animations removed - ready for redesign */

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.dark .header {
  background: rgba(15, 23, 42, 0.95);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo-container {
  position: relative;
}

.logo {
  height: 32px;
  width: auto;
  transition: opacity 0.3s ease;
}

.logo-light {
  display: none;
}

.dark .logo-dark {
  display: none;
}

.dark .logo-light {
  display: block;
}

.nav {
  display: none;
  gap: 2rem;
}

.nav-link {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  border-radius: 0.5rem;
  transition: background-color 0.3s ease;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
}

.moon-icon {
  display: none;
}

.dark .sun-icon {
  display: none;
}

.dark .moon-icon {
  display: block;
}

.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all 0.3s ease;
}

/* Mobile menu active state */
.nav.active {
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  border-bottom: 1px solid var(--border-color);
  padding: 2rem 1rem;
  gap: 1rem;
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.dark .nav.active {
  background: rgba(15, 23, 42, 0.98);
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: scale(1.05);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.5), 0 0 60px rgba(168, 85, 247, 0.3);
}

.btn-secondary {
  background: var(--bg-secondary);
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
}

.btn-secondary:hover {
  transform: scale(1.05);
  border-color: var(--accent-primary);
  background: rgba(59, 130, 246, 0.1);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

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

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

.btn-large {
  padding: 0.75rem 2rem;
  font-size: 1.125rem;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 64px;
  background: var(--bg-primary);
}

.hero-background {
  position: absolute;
  inset: 0;
  background-image: url("../images/space-bg.jpg");
  background-size: cover;
  background-position: center;
}

.hero-background::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.2);
}

.dark .hero-background::after {
  background: rgba(0, 0, 0, 0.4);
}

.floating-element {
  position: absolute;
  padding: 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--accent-primary);
  border-radius: 50%;
  color: var(--accent-primary);
  opacity: 0.8;
}

.floating-element.float-1 {
  top: 20%;
  left: 10%;
}

.floating-element.float-2 {
  top: 32%;
  right: 20%;
}

.floating-element.float-3 {
  bottom: 32%;
  left: 20%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 10;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--accent-primary);
  border-radius: 2rem;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-cards {
  display: none;
  position: relative;
  height: 400px;
}

.hero-card {
  position: absolute;
  padding: 1.5rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
}

.hero-card.card-1 {
  top: -12%;
  left: 0;
}

.hero-card.card-2 {
  top: 24%;
  left: 8%;
}

.hero-card.card-3 {
  bottom: 0;
  right: 12%;
}

.hero-card svg {
  color: var(--accent-primary);
  margin-bottom: 0.75rem;
}

.hero-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.hero-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Section */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

/* Features Section */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  text-align: center;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: linear-gradient(45deg, var(--accent-tertiary) 0%, var(--accent-secondary) 100%);
  border-radius: 50%;
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  color: white;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Solutions Section */
.solutions {
  background: var(--bg-secondary);
}

.solutions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.solution-card {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  display: flex;
  flex-direction: column;
}

.solution-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: linear-gradient(45deg, var(--accent-tertiary) 0%, var(--accent-secondary) 100%);
  border-radius: 50%;
  margin-bottom: 1.5rem;
}

.solution-icon svg {
  color: white;
}

.solution-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.solution-card > p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.solution-features {
  list-style: none;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.solution-features li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.solution-features li::before {
  content: "";
  width: 6px;
  height: 6px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  flex-shrink: 0;
}

/* RAG Section */
.rag-section {
  background: var(--bg-secondary);
}

.rag-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}

.rag-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.rag-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 2rem;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.rag-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  line-height: 1.8;
}

.rag-features {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 3rem;
}

.rag-feature {
  display: flex;
  gap: 1rem;
}

.rag-feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(45deg, var(--accent-tertiary) 0%, var(--accent-secondary) 100%);
  border-radius: 50%;
  flex-shrink: 0;
}

.rag-feature-icon svg {
  color: white;
}

.rag-feature h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.rag-feature p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.rag-demo {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.rag-image-container {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.rag-image {
  width: 100%;
  height: auto;
  display: block;
}

.chat-demo {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.chat-message {
  padding: 1rem;
  border-radius: 0.75rem;
}

.chat-message.user {
  background: rgba(59, 130, 246, 0.1);
}

.chat-message.assistant {
  background: rgba(168, 85, 247, 0.1);
}

.chat-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 0.5rem;
}

.chat-message.user .chat-indicator {
  background-color: var(--accent-primary);
}

.chat-message.assistant .chat-indicator {
  background-color: var(--accent-secondary);
}

.chat-label {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: inline-block;
}

.chat-message.user .chat-label {
  color: var(--accent-primary);
}

.chat-message.assistant .chat-label {
  color: var(--accent-secondary);
}

.chat-message p {
  color: var(--text-primary);
  margin-top: 0.5rem;
}

.chat-message ul {
  list-style: none;
  margin: 0.5rem 0;
  padding-left: 1rem;
}

.chat-message li {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0.25rem;
}

/* Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.testimonial-card {
  padding: 2rem;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
}

.testimonial-quote {
  color: var(--accent-primary);
  margin: 0 auto 1.5rem;
}

.testimonial-card blockquote {
  flex-grow: 1;
}

.testimonial-card blockquote p {
  font-size: 1.125rem;
  font-style: italic;
  color: var(--text-primary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.testimonial-stars {
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  margin-bottom: 1rem;
  color: var(--accent-primary);
}

.testimonial-author strong {
  display: block;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.testimonial-author span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin: 1.5rem 0;
  max-width: 400px;
  line-height: 1.8;
}

.footer-rating {
  display: flex;
  gap: 0.25rem;
  color: var(--accent-primary);
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-column h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 0.5rem;
}

.footer-column a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border);
}

.footer-bottom p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Responsive Design */
@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
  }

  .hero-cards {
    display: block;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .rag-content {
    grid-template-columns: 1fr 1fr;
  }

  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-content {
    grid-template-columns: 2fr 1fr;
  }
}

/* Smooth Scrolling */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .header,
  .theme-toggle,
  .btn,
  .floating-element {
    display: none;
  }

  body {
    background: white;
    color: black;
  }
}