:root {
  --bg: #0c0e14;
  --surface: #161922;
  --ink: #d4dce8;
  --accent: #ff6b35;
  --secondary: #4ecdc4;
  --ink-muted: #8a94a6;
  --radius: 6px;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  --font-display: 'Inter', system-ui, sans-serif;
  --font-body: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --grid-gap: 1.5rem;
  --container-max: 1280px;
  --header-height: 64px;
  --transition-fast: 150ms ease;
  --transition-med: 300ms ease;
  --transition-slow: 500ms ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover, a:focus {
  color: var(--secondary);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul {
  list-style: none;
}

address {
  font-style: normal;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.5rem, 15vw, 6rem);
  margin-bottom: var(--space-md);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  margin-bottom: var(--space-xs);
}

p {
  margin-bottom: var(--space-sm);
  max-width: 65ch;
}

.grid-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.grid-container.reversed-layout {
  display: grid;
  grid-template-columns: 1fr 4fr;
  gap: var(--space-lg);
  align-items: center;
}

@media (max-width: 768px) {
  .grid-container.reversed-layout {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--secondary));
  z-index: 1000;
  transition: width 100ms linear;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background-color: rgba(12, 14, 20, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(212, 220, 232, 0.1);
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  transition: box-shadow var(--transition-med);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

.brand-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  transition: color var(--transition-fast);
}

.brand-logo:hover, .brand-logo:focus {
  color: var(--accent);
}

.main-nav ul {
  display: flex;
  gap: var(--space-md);
}

.main-nav a {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-muted);
  transition: color var(--transition-fast);
}

.main-nav a:hover, .main-nav a:focus {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-xs);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--ink);
  transition: background-color var(--transition-fast);
}

.menu-toggle:hover span, .menu-toggle:focus span {
  background-color: var(--accent);
}

main {
  flex: 1 0 auto;
}

.hero-section {
  min-height: 90vh;
  display: flex;
  align-items: center;
  padding: var(--space-xl) 0;
  background-color: var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 4fr 6fr 2fr;
  gap: var(--space-md);
  align-items: start;
}

.hero-content {
  grid-column: 1 / 2;
}

.hero-visual {
  grid-column: 2 / 3;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 400px;
  position: relative;
}

#henon-curve {
  width: 100%;
  max-width: 500px;
  height: 100%;
  filter: drop-shadow(0 0 12px rgba(255, 107, 53, 0.15));
  transition: filter var(--transition-med);
}

.hero-annotations {
  grid-column: 3 / 4;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.annotation-block {
  padding: var(--space-xs) var(--space-xs);
  border-left: 2px solid var(--secondary);
  transition: background-color var(--transition-fast);
}

.annotation-block:hover {
  background-color: rgba(22, 25, 34, 0.6);
}

.hero-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--ink-muted);
  margin-bottom: var(--space-md);
  max-width: 55ch;
}

.hero-actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.cta-primary {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  background-color: var(--accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.cta-primary:hover, .cta-primary:focus {
  background-color: #e85a2a;
  transform: translateY(-2px);
}

.cta-secondary {
  display: inline-block;
  padding: 0.8rem 1.6rem;
  background-color: transparent;
  color: var(--secondary);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--secondary);
  border-radius: var(--radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.cta-secondary:hover, .cta-secondary:focus {
  background-color: rgba(78, 205, 196, 0.1);
  color: #fff;
}

.stats-section {
  padding: var(--space-lg) 0;
  background-color: var(--surface);
  border-top: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.stat-item {
  text-align: center;
  padding: var(--space-md);
}

.stat-number {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.content-section {
  padding: var(--space-lg) 0;
  background-color: var(--bg);
}

.section-heading {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.steps-container, .cards-container, .testimonials-grid, .values-grid {
  display: grid;
  gap: var(--space-md);
}

.steps-container {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.cards-container {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.step-card, .feature-card, .benefit-card, .value-card {
  background-color: var(--surface);
  padding: var(--space-md);
  border-radius: var(--radius);
  border: 1px solid rgba(212, 220, 232, 0.1);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.step-card:hover, .feature-card:hover, .benefit-card:hover, .value-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.step-card svg, .feature-card svg, .benefit-card svg, .value-card svg {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-sm);
}

.testimonials-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.testimonial-card {
  background-color: var(--surface);
  padding: var(--space-md);
  border-radius: var(--radius);
  border-left: 4px solid var(--secondary);
}

.testimonial-stars {
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.1em;
}

.testimonial-card blockquote {
  font-style: italic;
  color: var(--ink);
  margin-bottom: var(--space-sm);
}

.testimonial-card footer {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--surface);
  border-radius: var(--radius);
  margin-bottom: var(--space-sm);
  border: 1px solid rgba(212, 220, 232, 0.1);
}

.faq-question {
  padding: var(--space-md);
  font-family: var(--font-display);
  font-size: 1.1rem;
  cursor: pointer;
  width: 100%;
  text-align: left;
  color: var(--ink);
}

.faq-question:hover, .faq-question:focus {
  color: var(--accent);
  background-color: rgba(22, 25, 34, 0.5);
}

.faq-answer {
  padding: 0 var(--space-md) var(--space-md);
  color: var(--ink-muted);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink);
}

.form-field input {
  padding: 0.8rem;
  background-color: var(--surface);
  border: 1px solid rgba(212, 220, 232, 0.2);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1rem;
}

.form-field input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-color: transparent;
}

.field-error {
  color: #ff4d4d;
  font-size: 0.85rem;
  min-height: 1.2em;
}

.cta-banner {
  padding: var(--space-xl) 0;
  background-color: var(--surface);
  text-align: center;
  border-top: 2px solid var(--secondary);
}

.cta-banner h2 {
  margin-bottom: var(--space-md);
}

.site-footer {
  background-color: var(--bg);
  border-top: 1px solid rgba(212, 220, 232, 0.1);
  padding: var(--space-lg) 0 var(--space-md);
  margin-top: auto;
}

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

.footer-brand address {
  color: var(--ink-muted);
  margin-bottom: var(--space-sm);
  line-height: 1.5;
}

.footer-brand p {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.footer-nav h3, .footer-info h3, .footer-legal h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
  color: var(--accent);
}

.footer-nav ul, .footer-info ul, .footer-legal ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.footer-nav a, .footer-info li, .footer-legal a {
  font-size: 0.95rem;
  color: var(--ink-muted);
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid rgba(212, 220, 232, 0.1);
}

.footer-bottom p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--surface);
  border-top: 1px solid var(--accent);
  padding: var(--space-sm) var(--space-md);
  z-index: 1000;
  display: none;
}

.cookie-banner.visible {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.cookie-content {
  flex: 1;
  font-size: 0.9rem;
  color: var(--ink);
}

.cookie-actions {
  display: flex;
  gap: var(--space-xs);
  flex-shrink: 0;
}

.breadcrumb-bar {
  padding: var(--space-sm) 0;
  background-color: var(--surface);
  border-bottom: 1px solid rgba(212, 220, 232, 0.1);
}

.breadcrumb-bar .grid-container {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-muted);
}

.breadcrumb-separator {
  color: var(--accent);
}

.legal-breadcrumb .breadcrumb-current {
  color: var(--ink);
}

.legal-page {
  padding: var(--space-lg) 0;
  background-color: var(--bg);
}

.legal-title {
  text-align: center;
  margin-bottom: var(--space-sm);
}

.legal-effective {
  text-align: center;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: var(--space-md);
}

.legal-intro {
  max-width: 80ch;
  margin: 0 auto var(--space-lg);
  text-align: center;
}

.legal-section {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(212, 220, 232, 0.1);
}

.legal-section h2 {
  font-size: 1.2rem;
  margin-bottom: var(--space-sm);
  color: var(--secondary);
}

.legal-section p {
  max-width: 75ch;
  margin-left: 0;
  margin-bottom: var(--space-sm);
}

.cookie-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
  font-size: 0.9rem;
}

.cookie-table th, .cookie-table td {
  padding: var(--space-xs);
  border: 1px solid rgba(212, 220, 232, 0.2);
  text-align: left;
}

.cookie-table th {
  background-color: var(--surface);
  color: var(--accent);
  font-family: var(--font-mono);
}

.thank-you-card {
  max-width: 600px;
  margin: var(--space-xl) auto;
  padding: var(--space-lg);
  background-color: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--secondary);
  text-align: center;
}

.success-icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--space-md);
}

.thank-you-title {
  margin-bottom: var(--space-md);
  color: var(--secondary);
}

.thank-you-text {
  margin-bottom: var(--space-lg);
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid rgba(212, 220, 232, 0.1);
    padding: var(--space-md);
    display: none;
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-visual {
    grid-column: 1;
    min-height: 300px;
  }

  .hero-annotations {
    grid-column: 1;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .cookie-banner.visible {
    flex-direction: column;
    text-align: center;
  }

  .cookie-actions {
    width: 100%;
    justify-content: center;
  }

  h1 {
    font-size: clamp(2rem, 12vw, 4rem);
  }

  .content-section {
    padding: var(--space-md) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-progress,
  .site-header,
  .cta-primary:hover,
  .cta-secondary:hover,
  .step-card:hover,
  .feature-card:hover,
  .benefit-card:hover,
  .value-card:hover,
  .annotation-block:hover {
    transition: none;
    animation: none;
  }

  .hero-visual {
    filter: none;
  }
}

.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.fade-up.visible,
.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

[aria-expanded="true"] ~ .main-nav {
  display: block;
}

[disabled] {
  pointer-events: none;
  opacity: 0.6;
}

mark {
  background-color: rgba(255, 107, 53, 0.2);
  color: var(--ink);
  padding: 0 4px;
  border-radius: 2px;
}