:root {
  --bg: #1a1a1a;
  --surface: #f0f0f0;
  --ink: #005eff;
  --accent: #ff3300;
  --secondary: #888888;
  --font-head: 'Inter Black', 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;
  --radius: 4px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --transition: 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  --glow: 0 0 12px rgba(0, 94, 255, 0.4);
}

.theme-dark {
  --bg: #1a1a1a;
  --surface: #2a2a2a;
  --ink: #f0f0f0;
  --ink-dim: #888888;
  --accent: #005eff;
  --accent-glow: rgba(0, 94, 255, 0.2);
  --border: rgba(240, 240, 240, 0.15);
  --scrollbar-track: #1a1a1a;
  --scrollbar-thumb: #888888;
}

.theme-light {
  --bg: #f0f0f0;
  --surface: #ffffff;
  --ink: #1a1a1a;
  --ink-dim: #555555;
  --accent: #ff3300;
  --accent-glow: rgba(255, 51, 0, 0.15);
  --border: rgba(26, 26, 26, 0.15);
  --scrollbar-track: #f0f0f0;
  --scrollbar-thumb: #555555;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  scrollbar-width: thin;
}

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  text-transform: uppercase;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  text-transform: uppercase;
}

p {
  margin-bottom: 1.5rem;
  max-width: 70ch;
  font-size: 0.95rem;
}

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

a:hover, a:focus {
  color: var(--accent);
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

.site-container {
  width: 100%;
  min-height: 100vh;
  position: relative;
  padding: 0 2rem;
}

section {
  width: 100%;
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
}

section:not(:last-child) {
  border-bottom: 1px solid var(--border);
}

@media (max-width: 768px) {
  section:not(:last-child) {
    border-bottom: 1px solid var(--border);
    border-left: 2px solid var(--accent);
    transform: translateX(4px);
  }
  .site-container {
    padding: 0 1rem;
  }
}

#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  width: 0%;
  z-index: 1000;
  transition: width 0.1s linear;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 900;
  background: rgba(26, 26, 26, 0.85);
  backdrop-filter: blur(12px);
  transition: padding 0.3s ease, background 0.3s ease;
}

body.theme-light .site-header {
  background: rgba(240, 240, 240, 0.85);
}

.site-header.is-sticky {
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
}

.brand-logo {
  font-family: var(--font-head);
  font-size: 1.2rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.menu-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.main-nav {
  position: fixed;
  top: 60px;
  left: 0;
  width: 100%;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 2rem;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), opacity 0.4s ease;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.main-nav.is-open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.main-nav a {
  font-family: var(--font-head);
  font-size: 1.5rem;
  color: var(--ink);
  text-transform: uppercase;
  display: block;
}

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

.main-nav a::before {
  content: '>';
  margin-right: 0.5rem;
  color: var(--accent);
}

#cursor-crosshair {
  position: fixed;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  opacity: 0.6;
}

#cursor-crosshair::before, #cursor-crosshair::after {
  content: '';
  position: absolute;
  background: var(--accent);
}

#cursor-crosshair::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
}

#cursor-crosshair::after {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
}

body.theme-light #cursor-crosshair {
  opacity: 0.4;
}

#phase-regulator {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 60px;
  height: 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 15px;
  z-index: 800;
  cursor: pointer;
  transition: background var(--transition);
}

.regulator-track {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 22px;
  height: 22px;
  background: var(--accent);
  border-radius: 50%;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

#phase-regulator.is-active .regulator-track {
  transform: translateX(30px);
}

#phase-regulator:focus-visible .regulator-track {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

#home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  position: relative;
}

.hero-vector-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.15;
  pointer-events: none;
}

.hero-vector-container svg {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 7rem);
  text-transform: uppercase;
  color: var(--ink);
  line-height: 0.9;
  margin-bottom: 1rem;
  word-break: break-word;
}

.hero-slogan {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
  min-height: 1.5em;
}

.hero-slogan::after {
  content: '|';
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--ink-dim);
  max-width: 60ch;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-family: var(--font-head);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  transition: all var(--transition);
  min-width: 200px;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border: 1px solid var(--accent);
  box-shadow: 0 4px 16px rgba(255, 51, 0, 0.3);
}

.btn-primary:hover, .btn-primary:focus {
  background: transparent;
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(255, 51, 0, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover, .btn-secondary:focus {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

#stats {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}

.stats-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.stat-item {
  text-align: left;
  padding: 1.5rem 0;
  border-left: 2px solid var(--border);
}

.stat-number {
  font-family: var(--font-head);
  font-size: 3rem;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

#about {
  padding: 8rem 0;
}

.about-grid, .philosophy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.about-visual, .philosophy-visual {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
}

.about-text, .philosophy-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.pill-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.5rem 1rem;
  background: var(--accent-glow);
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 20px;
  margin-bottom: 1.5rem;
  width: fit-content;
}

#process {
  padding: 8rem 0;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50px;
  width: 1px;
  height: 100%;
  background: var(--border);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 1;
  padding-left: 100px;
}

.step-number {
  font-family: var(--font-head);
  font-size: 4rem;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 1rem;
  line-height: 1;
}

.step h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--ink);
}

.step p {
  color: var(--ink-dim);
  line-height: 1.7;
}

#features, #benefits {
  padding: 8rem 0;
}

.cards-grid, .testimonials-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.feature-card, .testimonial-card, .benefit-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2.5rem;
  border-radius: var(--radius);
  transition: transform var(--transition), border-color var(--transition);
}

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

.feature-icon, .benefit-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.5rem;
  stroke: var(--accent);
  stroke-width: 1.5;
  fill: none;
}

.testimonial-card .quote {
  font-family: var(--font-head);
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.testimonial-card .author {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.testimonial-card .stars {
  color: var(--accent);
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.signature-svgs svg path {
  stroke: var(--ink);
  fill: none;
  stroke-width: 1.5;
  opacity: 0.8;
}

.sig-svgs-block {
  position: relative;
  width: 100%;
  height: 300px;
  margin: 2rem 0;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
}

#spirooid-generator, #oscillogram-generator {
  width: 100%;
  height: 100%;
}

#faq {
  padding: 8rem 0;
}

.faq-list {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 1.5rem 0;
  font-family: var(--font-head);
  font-size: 1.2rem;
  color: var(--ink);
  transition: color var(--transition);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  transition: transform 0.3s ease;
}

.faq-item.is-open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.faq-item.is-open .faq-answer {
  max-height: 500px;
}

.faq-answer p {
  padding: 0 0 1.5rem 0;
  color: var(--ink-dim);
  line-height: 1.7;
}

#contact {
  padding: 8rem 0;
}

.contact-form {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-field {
  width: 100%;
  padding: 1rem 1.2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--ink);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-field::placeholder {
  color: var(--ink-dim);
}

.field-error {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 0.5rem;
  min-height: 1em;
}

.contact-form .btn {
  margin-top: 1rem;
}

.cta-banner {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 6rem 0;
  text-align: center;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

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

.footer-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto 3rem auto;
}

.footer-col h4 {
  font-size: 1rem;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.footer-col a {
  color: var(--ink-dim);
  font-size: 0.9rem;
}

.footer-col a:hover, .footer-col a:focus {
  color: var(--accent);
}

.copyright {
  text-align: center;
  font-size: 0.8rem;
  color: var(--ink-dim);
  border-top: 1px solid var(--border);
  padding-top: 2rem;
}

body.theme-light .copyright {
  color: var(--ink-dim);
}

.legal-page .site-header {
  background: transparent;
  backdrop-filter: none;
  border-bottom: 1px solid var(--border);
}

.legal-intro {
  max-width: 800px;
  margin: 0 auto 4rem auto;
}

.legal-content h2 {
  font-size: 1.8rem;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
}

.legal-content h3 {
  font-size: 1.4rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.legal-content p {
  margin-bottom: 1.5rem;
}

.legal-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0 4rem 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.legal-table th, .legal-table td {
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  text-align: left;
}

.legal-table th {
  background: var(--surface);
  color: var(--accent);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

body.theme-light .legal-table th {
  background: #e0e0e0;
  color: var(--accent);
}

.thank-you-card {
  max-width: 600px;
  margin: 4rem auto;
  padding: 4rem 2rem;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 2rem auto;
  stroke: var(--accent);
  stroke-width: 1.5;
  fill: none;
}

.thank-you-card h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.thank-you-card p {
  margin: 0 auto 2rem auto;
}

#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  z-index: 1000;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.2);
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.theme-light #cookie-banner {
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.1);
}

.cookie-banner.hidden {
  transform: translateY(100%);
  pointer-events: none;
}

.cookie-banner h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--ink);
}

.cookie-banner p {
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin-bottom: 1rem;
  max-width: 60ch;
}

.cookie-actions {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  #cookie-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
  }
  .cookie-actions {
    width: 100%;
    justify-content: space-between;
  }
  .cookie-banner p {
    margin-bottom: 1.5rem;
  }
}

.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 768px) {
  .about-grid, .philosophy-grid, .stats-section {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .step {
    padding-left: 0;
  }
  .process-steps::before {
    left: 0;
  }
  .step-number {
    margin-bottom: 0.5rem;
  }
  .footer-col {
    grid-template-columns: 1fr 1fr;
  }
  .hero-title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }
  .hero-slogan {
    font-size: 0.9rem;
  }
  .btn {
    width: 100%;
    min-width: auto;
  }
  .hero-cta-group {
    flex-direction: column;
  }
  .cta-actions {
    flex-direction: column;
  }
  .cta-actions .btn {
    width: 100%;
  }
  #phase-regulator {
    bottom: 1rem;
    right: 1rem;
  }
}