/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
  /* Color Palette - Modern Tech Theme */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #10b981;
  --accent: #f59e0b;
  --dark: #0f172a;
  --dark-alt: #1e293b;
  --gray: #475569;
  --gray-light: #cbd5e1;
  --gray-lighter: #f1f5f9;
  --white: #ffffff;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ===========================
   Navigation
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-light);
  z-index: 1000;
  padding: var(--space-sm) 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.tagline {
  font-size: 0.75rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.nav-link {
  text-decoration: none;
  color: var(--gray);
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition);
}

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

.nav-cta .launching-badge {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
  padding: 8rem 0 var(--space-3xl);
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  margin-top: 60px;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  color: var(--dark);
  margin-bottom: var(--space-md);
  letter-spacing: -1px;
}

.highlight {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.stat {
  text-align: center;
  padding: var(--space-md);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--gray);
  font-weight: 500;
}

/* Hero Visual Card */
.hero-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-lg);
  border: 1px solid var(--gray-light);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--gray-lighter);
}

.card-icon {
  font-size: 1.5rem;
}

.card-title {
  font-weight: 600;
  color: var(--dark);
  flex: 1;
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-running {
  background: #dcfce7;
  color: #166534;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.test-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--gray-lighter);
  font-size: 0.9rem;
}

.test-item.active {
  background: #dbeafe;
  animation: pulse 2s infinite;
}

.test-item.pending {
  opacity: 0.5;
}

.check-icon {
  color: var(--success);
  font-weight: bold;
}

.loader-icon {
  color: var(--primary);
  animation: spin 1s linear infinite;
}

.pending-icon {
  color: var(--gray);
}

.time {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--gray);
  font-family: var(--font-mono);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  padding-top: var(--space-md);
  border-top: 1px solid var(--gray-lighter);
  font-size: 0.9rem;
  color: var(--gray);
}

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

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ===========================
   Section Styling
   =========================== */
section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--space-md);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: var(--space-md);
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}

/* ===========================
   Problem Section
   =========================== */
.problem-section {
  background: var(--gray-lighter);
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.problem-card {
  background: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

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

.problem-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.problem-card h3 {
  font-size: 1.4rem;
  color: var(--dark);
  margin-bottom: var(--space-md);
}

.problem-card p {
  color: var(--gray);
  line-height: 1.7;
}

.problem-card em {
  font-style: italic;
  color: var(--primary);
}

/* ===========================
   Solution Section
   =========================== */
.solution-section {
  background: var(--dark);
  color: var(--white);
}

.solution-section .section-tag {
  background: var(--primary);
}

.solution-section h2,
.solution-section h4 {
  color: var(--white);
}

.solution-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.lead {
  font-size: 1.15rem;
  color: var(--gray-light);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}

.solution-features {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.solution-feature {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--primary);
}

.feature-icon {
  font-size: 1.75rem;
  flex-shrink: 0;
}

.solution-feature h4 {
  font-size: 1.1rem;
  margin-bottom: var(--space-xs);
}

.solution-feature p {
  color: var(--gray-light);
  font-size: 0.95rem;
}

/* Workflow Diagram */
.workflow-diagram {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.workflow-step {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.step-content p {
  font-size: 0.85rem;
  color: var(--gray-light);
}

.workflow-arrow {
  text-align: center;
  font-size: 1.5rem;
  color: var(--primary-light);
  margin: -var(--space-sm) 0;
}

/* ===========================
   Features Section
   =========================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-light);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.feature-header {
  margin-bottom: var(--space-md);
}

.feature-icon-large {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--space-md);
}

.feature-card h3 {
  font-size: 1.3rem;
  color: var(--dark);
  margin-bottom: var(--space-md);
}

.feature-card > p {
  color: var(--gray);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.feature-list li {
  padding-left: var(--space-md);
  position: relative;
  color: var(--gray);
  font-size: 0.9rem;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
}

/* ===========================
   How It Works Section
   =========================== */
.how-it-works-section {
  background: var(--gray-lighter);
}

.process-timeline {
  max-width: 800px;
  margin: 0 auto;
}

.timeline-item {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
  position: relative;
}

.timeline-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 30px;
  top: 70px;
  width: 2px;
  height: calc(100% + var(--space-lg));
  background: var(--primary-light);
  opacity: 0.3;
}

.timeline-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.timeline-content {
  flex: 1;
  background: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.timeline-content h3 {
  font-size: 1.4rem;
  color: var(--dark);
  margin-bottom: var(--space-sm);
}

.timeline-content p {
  color: var(--gray);
  line-height: 1.7;
}

/* ===========================
   Use Cases Section
   =========================== */
.roles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.role-card {
  background: linear-gradient(135deg, var(--white) 0%, var(--gray-lighter) 100%);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-light);
  transition: var(--transition);
}

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

.role-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.role-icon {
  font-size: 2rem;
}

.role-card h3 {
  font-size: 1.3rem;
  color: var(--dark);
}

.role-benefit {
  font-size: 1.05rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.role-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.role-list li {
  padding-left: var(--space-md);
  position: relative;
  color: var(--gray);
}

.role-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

/* ===========================
   Tech Stack Section
   =========================== */
.tech-stack-section {
  background: var(--dark-alt);
  color: var(--white);
}

.tech-stack-section .section-tag {
  background: var(--secondary);
}

.tech-stack-section h2 {
  color: var(--white);
}

.tech-categories {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.tech-category h3 {
  color: var(--white);
  font-size: 1.2rem;
  margin-bottom: var(--space-md);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.tech-tag {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-xl);
  font-size: 0.9rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

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

/* ===========================
   Roadmap Section
   =========================== */
.roadmap-section {
  background: var(--gray-lighter);
}

.roadmap-timeline {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.roadmap-item {
  background: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-light);
  position: relative;
  transition: var(--transition);
}

.roadmap-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.roadmap-item.completed {
  border-color: var(--success);
}

.roadmap-item.completed::before {
  content: "✓";
  position: absolute;
  top: -12px;
  right: var(--space-md);
  background: var(--success);
  color: var(--white);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

.roadmap-item.current {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--white) 0%, #dbeafe 100%);
}

.roadmap-item.current::before {
  content: "→";
  position: absolute;
  top: -12px;
  right: var(--space-md);
  background: var(--primary);
  color: var(--white);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: bold;
}

.roadmap-date {
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
}

.roadmap-content h3 {
  font-size: 1.2rem;
  color: var(--dark);
  margin-bottom: var(--space-sm);
}

.roadmap-content p {
  color: var(--gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ===========================
   CTA Section
   =========================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--white);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.cta-content h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--space-md);
}

.cta-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
  opacity: 0.9;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--white);
  color: var(--primary);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-xl);
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: var(--shadow-xl);
  margin-bottom: var(--space-md);
}

.badge-icon {
  font-size: 1.5rem;
}

.cta-note {
  font-size: 0.95rem;
  opacity: 0.8;
}

/* ===========================
   Footer
   =========================== */
.footer {
  background: var(--dark);
  color: var(--gray-light);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand .logo-large {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.footer-brand p {
  color: var(--gray-light);
}

.footer-links {
  display: flex;
  gap: var(--space-3xl);
}

.footer-column h4 {
  color: var(--white);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

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

.footer-column li {
  margin-bottom: var(--space-sm);
}

.footer-column a {
  color: var(--gray-light);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--dark-alt);
  padding-top: var(--space-lg);
  text-align: center;
  color: var(--gray);
  font-size: 0.9rem;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
  .hero .container,
  .solution-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

  .tech-categories {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .nav-menu {
    display: none;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .problem-grid,
  .features-grid,
  .roles-grid {
    grid-template-columns: 1fr;
  }

  .section-header h2 {
    font-size: 2rem;
  }

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

  .roadmap-timeline {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  section {
    padding: var(--space-2xl) 0;
  }

  .hero {
    padding: 6rem 0 var(--space-2xl);
  }

  .hero-title {
    font-size: 2rem;
  }

  .cta-content h2 {
    font-size: 1.75rem;
  }
}

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

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}