:root {
  --bg: #050508;
  --bg-elevated: #0c0c14;
  --surface: #12121c;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8eaef;
  --text-muted: #8b93a7;
  --accent: #0080e8;
  --accent-bright: #33a0ff;
  --accent-glow: rgba(0, 128, 232, 0.35);
  --green: #3ecf8e;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --max-width: 72rem;
  --radius: 0.75rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-bright);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #6bc4ff;
}

.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}

.site-header.scrolled {
  background: rgba(5, 5, 8, 0.85);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.logo img {
  width: 2.25rem;
  height: 2.25rem;
}

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

.nav a {
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

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

.nav-cta {
  color: var(--text) !important;
  background: var(--accent);
  padding: 0.5rem 1.125rem;
  border-radius: 999px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--accent-bright);
  color: var(--text) !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 0.25rem;
}

/* Hero */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-block: 7rem 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  top: 10%;
  left: 50%;
  translate: -50% 0;
  width: min(90vw, 48rem);
  height: min(90vw, 48rem);
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 65%);
  opacity: 0.6;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 4rem 4rem;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 75%);
}

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

.hero-content {
  max-width: 34rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 1.25rem;
}

.eyebrow::before {
  content: "";
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--text) 30%, var(--accent-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.1875rem;
  color: var(--text-muted);
  margin: 0 0 2rem;
  line-height: 1.7;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9375rem;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 2rem var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-bright);
  color: #fff;
  box-shadow: 0 0 2.5rem var(--accent-glow);
}

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

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-cube {
  width: min(100%, 28rem);
  filter: drop-shadow(0 0 4rem var(--accent-glow));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Pillars */

.pillars {
  padding-block: 3rem;
  border-block: 1px solid var(--border);
  background: var(--bg-elevated);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.pillar {
  text-align: center;
  padding: 1rem;
}

.pillar-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 0.875rem;
  color: var(--accent-bright);
}

.pillar-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.pillar-label {
  font-weight: 600;
  font-size: 0.9375rem;
  margin-bottom: 0.25rem;
}

.pillar-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Platform */

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

.platform-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.25);
  padding: 2.25rem;
}

.platform-card h3 {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.platform-card > p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin: 0 0 1.5rem;
}

.platform-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-bright);
  background: rgba(0, 128, 232, 0.12);
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.platform-badge.accent-green {
  color: var(--green);
  background: rgba(62, 207, 142, 0.12);
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.625rem;
}

.feature-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: var(--accent);
}

/* Modules */

.module-contract {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.contract-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}

.contract-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 0.375rem;
}

.contract-val {
  display: block;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  justify-content: center;
}

.tag {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.4375rem 0.875rem;
  border-radius: 999px;
  transition: border-color 0.2s, color 0.2s;
}

.tag:hover {
  border-color: rgba(0, 128, 232, 0.35);
  color: var(--text);
}

/* Capabilities */

.capabilities {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

/* Formula */

.formula {
  padding-block: 5rem;
}

.formula-box {
  max-width: 52rem;
  margin-inline: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) * 1.25);
  padding: 2rem;
  text-align: center;
}

.formula-code {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(0.75rem, 2vw, 0.875rem);
  line-height: 1.7;
  color: var(--text-muted);
  word-break: break-word;
}

.formula-tagline {
  margin: 1.5rem 0 0;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
}

/* Sections */

section {
  padding-block: 5rem;
}

.section-header {
  max-width: 40rem;
  margin-bottom: 3rem;
}

.section-header.centered {
  margin-inline: auto;
  text-align: center;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.0625rem;
  margin: 0;
  line-height: 1.7;
}

/* Cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color 0.25s, transform 0.25s;
}

.card:hover {
  border-color: rgba(0, 128, 232, 0.35);
  transform: translateY(-2px);
}

.card-icon {
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 128, 232, 0.12);
  border-radius: 0.625rem;
  color: var(--accent-bright);
  margin-bottom: 1.25rem;
}

.card-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.625rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.65;
}

/* Process */

.process {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: 1.5rem;
}

.process-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 1rem;
}

.process-step h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.process-step p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0;
  line-height: 1.6;
}

/* CTA */

.cta {
  padding-block: 5rem;
}

.cta-box {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 128, 232, 0.15) 0%, var(--surface) 50%);
  border: 1px solid rgba(0, 128, 232, 0.25);
  border-radius: calc(var(--radius) * 1.5);
  padding: clamp(2.5rem, 5vw, 4rem);
  text-align: center;
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, var(--accent-glow), transparent 55%);
  pointer-events: none;
}

.cta-box h2 {
  position: relative;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

.cta-box p {
  position: relative;
  color: var(--text-muted);
  font-size: 1.0625rem;
  max-width: 32rem;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.cta-box .btn {
  position: relative;
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 2.5rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-brand img {
  width: 1.5rem;
  height: 1.5rem;
  opacity: 0.8;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-links a:hover {
  color: var(--text);
}

/* Responsive */

@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-content {
    max-width: none;
  }

  .eyebrow {
    justify-content: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-cube {
    width: min(70vw, 18rem);
  }

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

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

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

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

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

@media (max-width: 640px) {
  .menu-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(5, 5, 8, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.75rem 1rem;
    width: 100%;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.5rem;
  }

  .pillars-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }

  .module-contract {
    grid-template-columns: 1fr;
  }

  .process-steps {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}