:root {
  /* Brand Colors - Purple/Black theme from pitch deck */
  --brand-purple: #8b5cf6;
  --brand-purple-light: #a78bfa;
  --brand-purple-dark: #6d28d9;
  --brand-black: #0a0a0a;
  --brand-black-light: #1a1a1a;
  
  /* Semantic Colors */
  --bg-primary: #000000;
  --bg-secondary: #0f0f0f;
  --bg-tertiary: #1a0a2e;
  --surface: #1a1a1a;
  --surface-elevated: #242424;
  
  --text-primary: #ffffff;
  --text-secondary: #b4b4b4;
  --text-muted: #737373;
  
  --border: rgba(139, 92, 246, 0.2);
  --border-subtle: rgba(255, 255, 255, 0.1);
  
  --accent: var(--brand-purple);
  --accent-hover: var(--brand-purple-light);
  
  /* Spacing */
  --container-max: 1200px;
  --section-padding: 120px;
  --section-padding-mobile: 60px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
}

/* Fixed background that stays in place while scrolling */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url('./assets/hero-bg.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  opacity: 0.4;
  z-index: -2;
  transition: opacity 0.6s ease;
}

/* Dark overlay for readability */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, 
    rgba(10, 10, 10, 0.7) 0%, 
    rgba(10, 10, 10, 0.85) 50%,
    rgba(10, 10, 10, 0.95) 100%
  );
  z-index: -1;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

/* Accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 999;
  padding: 1rem 1.5rem;
  background: var(--accent);
  color: white;
  font-weight: 600;
  border-radius: 0.5rem;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Container */
.container {
  width: min(var(--container-max), 92%);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 4%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  height: 36px;
  width: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s;
}

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

.site-nav .cta {
  background: var(--accent);
  color: white;
  padding: 0.625rem 1.25rem;
  border-radius: 0.5rem;
  transition: background 0.2s;
}

.site-nav .cta:hover {
  background: var(--accent-hover);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  padding: 8px;
  border-radius: 6px;
}

.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* Hero */
.hero {
  padding: 120px 0 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.25), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  position: relative;
  max-width: 900px;
}

.hero-logo {
  margin: 0 0 2.5rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  opacity: 0.95;
}

.hero-logo img {
  height: 140px;
  width: auto;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(139, 92, 246, 0.4));
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
  background: linear-gradient(135deg, #ffffff 0%, #b4b4b4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lead {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 2rem;
}

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

.hero-visual {
  display: none;
}

.gradient-orb {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-purple), var(--brand-purple-dark));
  filter: blur(80px);
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 0.625rem;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid transparent;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
}

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.1);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.section-header p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin: 0;
}

/* Capabilities / Difference */
.capabilities, .difference {
  padding: var(--section-padding) 0;
}

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

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s;
}

.feature-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
  background: var(--surface-elevated);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(139, 92, 246, 0.1);
  border-radius: 0.75rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.feature-card p {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

/* Use Cases / How to Use */
.use-cases, .how-to-use {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03) 50%, transparent);
}

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

.use-case-card {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}

.use-case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--brand-purple-dark));
}

.use-case-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.use-case-card h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

.use-case-card > p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.checklist {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.checklist li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* How It Works */
.how-it-works {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.05) 50%, transparent);
}

.steps {
  display: grid;
  gap: 3rem;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: start;
}

.step-number {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent), var(--brand-purple-dark));
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.step-content p {
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

/* Intro / Why Now */
.intro, .why-now {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03) 50%, transparent);
}

.narrow {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.narrow h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
}

.large-text {
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

/* Visual Grid */
.visual-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 4rem auto 0;
  padding: 0;
}

.visual-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 1rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  transition: all 0.3s;
}

.visual-item:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.2);
}

.metric {
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--brand-purple-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.75rem;
  line-height: 1;
}

.metric-label {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 500;
}

/* Social Proof */
.social-proof {
  padding: var(--section-padding) 0;
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03) 50%, transparent);
}

.testimonial {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 3rem;
}

.testimonial p {
  font-size: 1.5rem;
  line-height: 1.6;
  margin: 0 0 2rem;
  font-style: italic;
  color: var(--text-primary);
}

.testimonial cite {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.testimonial cite strong {
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial cite span {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* CTA Section */
.cta-section {
  padding: var(--section-padding) 0;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.cta-content h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin: 0 0 1rem;
}

.cta-content > p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
}

.form-note {
  text-align: center;
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-top: 1.5rem;
}

/* Contact Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: 1rem;
  padding: 2.5rem;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: 0.5rem;
  padding: 0.875rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.contact-form .btn {
  width: 100%;
  justify-content: center;
  margin-top: 1rem;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 4rem;
  margin-bottom: 3rem;
}

.footer-brand img {
  height: 32px;
  width: auto;
  margin-bottom: 1rem;
}

.tagline {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin: 0;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.nav-group h4 {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin: 0 0 1rem;
}

.nav-group a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
  transition: color 0.2s;
}

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

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

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }
  
  .hero .container {
    max-width: 100%;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
}

@media (max-width: 768px) {
  :root {
    --section-padding: var(--section-padding-mobile);
  }
  
  .hero {
    padding: 60px 0 60px;
  }
  
  .hero-logo {
    margin: 0 0 2rem;
  }
  
  .hero-logo img {
    height: 100px;
  }
  
  .site-nav {
    position: fixed;
    inset: 70px 1rem auto;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: 1rem;
    padding: 1rem;
    display: none;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  }
  
  .site-nav.open {
    display: flex;
  }
  
  .site-nav a {
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-align: center;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .grid-2 {
    grid-template-columns: 1fr;
  }
  
  .visual-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .footer-nav {
    grid-template-columns: 1fr;
  }
}