:root {
    --deep-space: #080C18;
    --slate-void: #0F1629;
    --card-bg: #141B2D;
    --indigo-charge: #7C5CFC;
    --violet-glow: #A78BFA;
    --signal-amber: #F97316;
    --amber-hover: #FB923C;
    --frost: #F0F2F5;
    --ash: #8892A5;
    --border: #1E293B;
    --border-accent: rgba(124,92,252,0.25);
  }

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

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  }

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

  body {
    background: var(--deep-space);
    color: var(--frost);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
  }

  /* ---------- UTILITY ---------- */
  .eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--indigo-charge);
    margin-bottom: 1rem;
  }

  .section-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
  }

  section { padding: 7rem 0; }

  /* ---------- NAV ---------- */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1.25rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(8,12,24,0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
  }

  .nav-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.35rem;
    color: var(--frost);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
  }

  .nav-logo .mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--indigo-charge), var(--violet-glow));
    border-radius: 6px;
  }

  .nav-logo .mark svg { width: 18px; height: 18px; }

  .nav-links { display: flex; gap: 2.5rem; align-items: center; }
  .nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ash);
    text-decoration: none;
    transition: color 0.2s;
  }
  .nav-links a:hover, .nav-links a:focus { color: var(--frost); outline: none; }

  .btn-demo {
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.6rem 1.4rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
  }

  .btn-demo--primary {
    background: var(--signal-amber);
    color: #fff;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
  }
  .btn-demo--primary:hover { background: var(--amber-hover); transform: translateY(-1px); }

  .btn-demo--ghost {
    background: transparent;
    color: var(--frost);
    border: 1px solid var(--border);
  }
  .btn-demo--ghost:hover { border-color: var(--ash); }

  .nav-links .btn-demo--primary {
    color: #fff;
    font-weight: 700;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
  }
  .nav-links .btn-demo--ghost { color: var(--frost); }

  /* ---------- HERO ---------- */
  .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
    position: relative;
    overflow: hidden;
  }

  .hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
  }

  .hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.8rem, 5.5vw, 4.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
  }

  .hero h1 .accent {
    background: linear-gradient(135deg, var(--indigo-charge), var(--violet-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-sub {
    font-size: 1.15rem;
    color: var(--ash);
    max-width: 480px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
  }

  .hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; }
  .hero-ctas .btn-demo { padding: 0.75rem 1.8rem; font-size: 0.9rem; }

  /* Composition Engine — the signature element */
  .composition-engine {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    max-width: 520px;
    justify-self: center;
  }

  .ce-canvas { width: 100%; height: 100%; }

  /* ---------- THESIS / PROBLEM ---------- */
  .thesis {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--slate-void);
  }

  .thesis-inner {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    padding: 0 2rem;
  }

  .thesis blockquote {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 500;
    line-height: 1.4;
    color: var(--frost);
    margin-bottom: 1.5rem;
  }

  .thesis blockquote em {
    font-style: normal;
    color: var(--indigo-charge);
  }

  .thesis p {
    color: var(--ash);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
  }

  /* ---------- PILLARS ---------- */
  .pillars-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3.5rem;
  }

  .pillar {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 2.5rem 2rem;
    transition: border-color 0.3s, transform 0.3s;
    position: relative;
  }

  .pillar:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
  }

  .pillar-icon {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    background: rgba(124,92,252,0.1);
    border: 1px solid rgba(124,92,252,0.2);
  }

  .pillar-icon svg { width: 22px; height: 22px; stroke: var(--indigo-charge); fill: none; }

  .pillar h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
  }

  .pillar p {
    color: var(--ash);
    font-size: 0.925rem;
    line-height: 1.7;
  }

  /* ---------- ARCHITECTURE STRIP ---------- */
  .arch-strip {
    background: var(--slate-void);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }

  .arch-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-top: 3rem;
    flex-wrap: wrap;
  }

  .arch-node {
    text-align: center;
    padding: 1.8rem 2.5rem;
    position: relative;
  }

  .arch-node-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ash);
    margin-bottom: 0.5rem;
  }

  .arch-node-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
  }

  .arch-connector {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--border), var(--indigo-charge), var(--border));
    position: relative;
  }

  .arch-connector::after {
    content: '▸';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--indigo-charge);
    font-size: 0.7rem;
  }

  /* ---------- DIFFERENTIATORS ---------- */
  .diff-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 3.5rem;
  }

  .diff-card {
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card-bg);
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    transition: border-color 0.3s;
  }

  .diff-card:hover { border-color: var(--border-accent); }

  .diff-marker {
    flex-shrink: 0;
    width: 8px;
    height: 8px;
    margin-top: 0.55rem;
    border-radius: 50%;
    background: var(--indigo-charge);
    box-shadow: 0 0 12px rgba(124,92,252,0.4);
  }

  .diff-card h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
  }

  .diff-card p {
    color: var(--ash);
    font-size: 0.875rem;
    line-height: 1.7;
  }

  /* ---------- DUAL AUDIENCE ---------- */
  .audience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 3.5rem;
  }

  .audience-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 3rem 2.5rem;
    position: relative;
    overflow: hidden;
  }

  .audience-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
  }

  .audience-card.for-tech::before {
    background: linear-gradient(90deg, var(--indigo-charge), var(--violet-glow));
  }

  .audience-card.for-invest::before {
    background: linear-gradient(90deg, var(--signal-amber), #FBBF24);
  }

  .audience-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
  }

  .audience-card ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
  }

  .audience-card li {
    color: var(--ash);
    font-size: 0.9rem;
    padding-left: 1.25rem;
    position: relative;
    line-height: 1.6;
  }

  .audience-card.for-tech li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--indigo-charge);
    font-weight: 600;
  }

  .audience-card.for-invest li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--signal-amber);
    font-weight: 600;
  }

  /* ---------- FOOTER CTA ---------- */
  .cta-section {
    text-align: center;
    padding: 8rem 0;
    position: relative;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    top: 0; left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124,92,252,0.08) 0%, transparent 70%);
    pointer-events: none;
  }

  .cta-section h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
  }

  .cta-section p {
    color: var(--ash);
    max-width: 500px;
    margin: 0 auto 2.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
  }

  .cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
  }

  .cta-buttons .btn-demo { padding: 0.85rem 2rem; font-size: 0.95rem; }

  /* ---------- FOOTER ---------- */
  footer {
    border-top: 1px solid var(--border);
    padding: 2.5rem 2rem;
    text-align: center;
  }

  footer p {
    font-size: 0.8rem;
    color: var(--ash);
    font-family: 'JetBrains Mono', monospace;
  }

  /* ---------- SCROLL REVEAL ---------- */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ---------- RESPONSIVE ---------- */
  @media (max-width: 900px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-sub { margin-left: auto; margin-right: auto; }
    .hero-ctas { justify-content: center; }
    .composition-engine { max-width: 360px; margin: 0 auto; }
    .pillars-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; margin-top: 3.5rem; }
    .diff-grid { grid-template-columns: 1fr; }
    .audience-grid { grid-template-columns: 1fr; }
    .arch-connector { width: 30px; }
    .arch-node { padding: 1.2rem 1.5rem; }
    .nav-links a:not(.btn-demo) { display: none; }
  }

  @media (max-width: 600px) {
    section { padding: 4.5rem 0; }
    .section-wrap { padding: 0 1.25rem; }
    .arch-flow { flex-direction: column; }
    .arch-connector { width: 2px; height: 30px; background: linear-gradient(180deg, var(--border), var(--indigo-charge), var(--border)); }
    .arch-connector::after { content: '▾'; right: 50%; top: auto; bottom: -6px; transform: translateX(50%); }
  }