:root {
    --acid: #c8ff00;
    --ink: #0b0b0b;
    --paper: #f4f1eb;
    --dim: #1a1a1a;
    --mid: #2e2e2e;
    --muted: #6a6a6a;
    --border: rgba(255,255,255,0.08);
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--ink);
    color: #e8e6e0;
    font-family: 'DM Sans', sans-serif;
    font-weight: 300;
    overflow-x: hidden;
    cursor: crosshair;
  }

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

  /* ── CANVAS LAYER ── */
  #bg-canvas {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
  }

  /* ── NAV ── */
  nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 2.5rem;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    background: rgba(11,11,11,0.7);
  }
  .nav-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem;
    letter-spacing: 0.12em;
    color: var(--acid);
  }
  .nav-links { display: flex; gap: 2rem; }
  .nav-links a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    transition: color 0.2s;
  }
  .nav-links a:hover { color: var(--acid); }
  .nav-cta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--acid);
    color: var(--ink);
    padding: 0.5rem 1.2rem;
    border: none;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.2s;
  }
  .nav-cta:hover { opacity: 0.85; }

  /* ── HERO ── */
  .hero {
    position: relative;
    z-index: 1;
    min-height: 100svh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 8rem 2.5rem 4rem;
    gap: 2rem;
  }

  .hero-left { position: relative; }

  .hero-eyebrow {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--acid);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
  }
  .hero-eyebrow::before {
    content: '';
    display: block;
    width: 32px;
    height: 1px;
    background: var(--acid);
  }

  .hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(6rem, 14vw, 13rem);
    line-height: 0.88;
    letter-spacing: -0.01em;
    color: #ffffff;
    margin-bottom: 0.15em;
  }
  .hero-title span { color: var(--acid); }

  .hero-sub {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--muted);
    max-width: 38ch;
    margin-top: 2rem;
    margin-bottom: 3rem;
  }

  .hero-actions { display: flex; gap: 1rem; align-items: center; }
  .btn-primary {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    background: var(--acid);
    color: var(--ink);
    padding: 0.85rem 2rem;
    border: 2px solid var(--acid);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
    display: inline-block;
  }
  .btn-primary:hover { background: transparent; color: var(--acid); }
  .btn-ghost {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    background: transparent;
    color: var(--muted);
    padding: 0.85rem 2rem;
    border: 2px solid var(--mid);
    cursor: pointer;
    transition: all 0.2s;
    display: inline-block;
  }
  .btn-ghost:hover { border-color: #fff; color: #fff; }

  .hero-right {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  /* live preview box */
  .live-box {
    position: relative;
    height: 360px;
    border: 1px solid var(--border);
    overflow: hidden;
    background: var(--dim);
  }
  .live-box-label {
    position: absolute;
    top: 1rem; left: 1rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--acid);
    opacity: 0.7;
    z-index: 2;
  }
  #preview-canvas { width: 100%; height: 100%; display: block; }

  .stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
  }
  .stat {
    background: var(--dim);
    padding: 1.4rem 1.2rem;
    border: none;
  }
  .stat-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.8rem;
    line-height: 1;
    color: var(--acid);
  }
  .stat-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 0.4rem;
  }

  /* ── SECTION COMMON ── */
  section {
    position: relative;
    z-index: 1;
  }

  .section-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2.5rem;
  }

  .section-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
  }

  /* ── MARQUEE ── */
  .marquee-track {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    overflow: hidden;
    padding: 1rem 0;
    background: var(--dim);
    white-space: nowrap;
  }
  .marquee-inner {
    display: inline-block;
    animation: marquee 22s linear infinite;
  }
  .marquee-inner span {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.1rem;
    letter-spacing: 0.2em;
    color: var(--muted);
    padding: 0 2.5rem;
  }
  .marquee-inner span em {
    color: var(--acid);
    font-style: normal;
  }
  @keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
  }

  /* ── HOW IT WORKS ── */
  .how-section {
    padding: 8rem 0;
    border-bottom: 1px solid var(--border);
  }
  .how-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
    margin-top: 3rem;
  }
  .how-heading {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 5vw, 5.5rem);
    line-height: 0.92;
    letter-spacing: -0.01em;
    color: #fff;
    margin-bottom: 1.5rem;
  }
  .how-desc {
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.8;
    max-width: 42ch;
    margin-bottom: 2rem;
  }

  .steps { display: flex; flex-direction: column; gap: 0; }
  .step {
    display: grid;
    grid-template-columns: 3rem 1fr;
    gap: 1.2rem;
    align-items: start;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border);
  }
  .step:last-child { border-bottom: 1px solid var(--border); }
  .step-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.4rem;
    color: var(--acid);
    padding-top: 0.1rem;
  }
  .step-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #fff;
    margin-bottom: 0.4rem;
  }
  .step-body {
    font-size: 0.88rem;
    color: var(--muted);
    line-height: 1.7;
  }

  /* ── CODE BLOCK ── */
  .code-panel {
    background: #0f0f0f;
    border: 1px solid var(--border);
    overflow: hidden;
  }
  .code-bar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
    background: #161616;
  }
  .code-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
  }
  .code-filename {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.12em;
    color: var(--muted);
    margin-left: 0.4rem;
  }
  .code-body {
    padding: 1.5rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
    color: #c9c9c9;
    overflow-x: auto;
  }
  .code-body .k { color: #c792ea; }
  .code-body .s { color: #c8ff00; }
  .code-body .n { color: #82aaff; }
  .code-body .c { color: #546e7a; font-style: italic; }
  .code-body .p { color: #89ddff; }

  /* ── SHAPES SHOWCASE ── */
  .shapes-section {
    padding: 8rem 0;
    border-bottom: 1px solid var(--border);
  }
  .shapes-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
  }
  .shapes-heading {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 5vw, 5.5rem);
    line-height: 0.92;
    color: #fff;
  }
  .shape-count-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    color: var(--muted);
    text-transform: uppercase;
    text-align: right;
  }
  .shape-count-label strong {
    display: block;
    font-family: 'Bebas Neue', sans-serif;
    font-size: 3.5rem;
    color: var(--acid);
    letter-spacing: 0;
    line-height: 1;
  }

  .shapes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 1px;
    background: var(--border);
  }
  .shape-tile {
    background: var(--dim);
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    transition: background 0.2s;
  }
  .shape-tile:hover { background: var(--mid); }
  .shape-tile svg { width: 36px; height: 36px; }
  .shape-tile .tile-name {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.55rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
  }
  .shape-tile:hover .tile-name { color: var(--acid); }

  /* ── API SECTION ── */
  .api-section {
    padding: 8rem 0;
    border-bottom: 1px solid var(--border);
  }
  .api-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
  }
  .api-heading {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 5vw, 5.5rem);
    line-height: 0.92;
    color: #fff;
    margin-bottom: 1.5rem;
  }
  .method-list { display: flex; flex-direction: column; }
  .method-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-top: 1px solid var(--border);
    gap: 1rem;
  }
  .method-item:last-child { border-bottom: 1px solid var(--border); }
  .method-name {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.82rem;
    color: var(--acid);
  }
  .method-desc {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--muted);
    text-align: right;
  }

  /* ── USE CASES ── */
  .use-section { padding: 8rem 0; border-bottom: 1px solid var(--border); }
  .use-heading {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3rem, 5vw, 5.5rem);
    line-height: 0.92;
    color: #fff;
    margin-bottom: 3rem;
  }
  .use-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border);
  }
  .use-card {
    background: var(--dim);
    padding: 2.5rem 2rem;
    transition: background 0.25s;
  }
  .use-card:hover { background: var(--mid); }
  .use-num {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 3.5rem;
    color: var(--border);
    line-height: 1;
    margin-bottom: 1.5rem;
    transition: color 0.25s;
  }
  .use-card:hover .use-num { color: var(--acid); }
  .use-title {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: #fff;
    margin-bottom: 0.8rem;
  }
  .use-body { font-size: 0.88rem; color: var(--muted); line-height: 1.7; }

  /* ── FOOTER ── */
  footer {
    position: relative;
    z-index: 1;
    padding: 4rem 2.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
  }
  .footer-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem;
    color: var(--acid);
    letter-spacing: 0.1em;
  }
  .footer-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    line-height: 1.8;
  }
  .footer-meta a:hover { color: var(--acid); }
  .footer-cta a {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    transition: all 0.2s;
    display: inline-block;
  }
  .footer-cta a:hover { border-color: var(--acid); color: var(--acid); }

  /* ── ANIMATIONS ── */
  @keyframes float-shape {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(8deg); }
  }
  .float { animation: float-shape 5s ease-in-out infinite; }

  @keyframes fade-up {
    from { opacity: 0; transform: translateY(32px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-up { animation: fade-up 0.7s ease forwards; opacity: 0; }
  .d1 { animation-delay: 0.1s; }
  .d2 { animation-delay: 0.25s; }
  .d3 { animation-delay: 0.4s; }
  .d4 { animation-delay: 0.55s; }
  .d5 { animation-delay: 0.7s; }

  /* ── RESPONSIVE ── */
  @media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; padding-top: 7rem; }
    .hero-right { display: none; }
    .how-grid, .api-grid { grid-template-columns: 1fr; }
    .use-grid { grid-template-columns: 1fr; }
    .shapes-header { flex-direction: column; align-items: flex-start; gap: 1rem; }
    footer { flex-direction: column; align-items: flex-start; }
    .nav-links { display: none; }
  }