:root {
  --bg: #0a0a0f;
  --bg2: #0f0f1a;
  --bg3: #14142a;
  --border: #1e1e3a;
  --accent: #7c5cfc;
  --accent2: #a78bfa;
  --accent3: #38bdf8;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #475569;
  --green: #4ade80;
  --font: 'Courier New', Courier, monospace;
  --sans: system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--text); font-family: var(--sans); font-size: 16px; line-height: 1.6; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
a { color: var(--accent2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 6rem 2rem 4rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(124,92,252,0.12) 0%, transparent 70%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.hero-inner { max-width: 800px; }
.badge {
  display: inline-block;
  font-family: var(--font);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.3rem 0.8rem;
  margin-bottom: 2rem;
  opacity: 0.85;
}
.hero h1 {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 0%, var(--accent2) 60%, var(--accent3) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h1 .v2 { color: var(--accent); -webkit-text-fill-color: var(--accent); }
.tagline { font-size: clamp(1.1rem, 2.5vw, 1.5rem); color: var(--text); margin-bottom: 1rem; font-weight: 500; }
.sub { font-size: 1rem; color: var(--muted); max-width: 600px; margin: 0 auto 2.5rem; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-bottom: 4rem; }
.btn-primary { background: var(--accent); color: #fff; padding: 0.75rem 2rem; font-weight: 600; border-radius: 4px; transition: background 0.2s; }
.btn-primary:hover { background: var(--accent2); text-decoration: none; color: #fff; }
.btn-ghost { border: 1px solid var(--border); color: var(--muted); padding: 0.75rem 2rem; border-radius: 4px; transition: border-color 0.2s, color 0.2s; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent2); text-decoration: none; }

.pipeline-anim { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; justify-content: center; font-family: var(--font); font-size: 0.72rem; letter-spacing: 0.08em; }
.pipe-node { background: var(--bg3); border: 1px solid var(--border); padding: 0.5rem 1rem; border-radius: 3px; color: var(--muted); transition: all 0.3s; }
.pipe-node.active, .pipe-node:hover { border-color: var(--accent); color: var(--accent2); background: rgba(124,92,252,0.1); }
.pipe-arrow { color: var(--dim); font-size: 0.8rem; }

/* SECTIONS */
.tax-section { padding: 6rem 2rem; background: var(--bg2); border-bottom: 1px solid var(--border); }
.pipeline-section { padding: 6rem 2rem; border-bottom: 1px solid var(--border); }
.integrity-section { padding: 6rem 2rem; background: var(--bg2); border-bottom: 1px solid var(--border); }
.stack-section { padding: 6rem 2rem; border-bottom: 1px solid var(--border); }

.tax-section h2, .pipeline-section h2, .integrity-section h2, .stack-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 1.25rem; color: #fff;
}
.section-lead { font-size: 1.1rem; color: var(--muted); max-width: 700px; margin-bottom: 3rem; line-height: 1.7; }

.tax-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; margin-bottom: 3rem; }
.tax-item { background: var(--bg3); border: 1px solid var(--border); border-left: 3px solid var(--accent); padding: 1.5rem; border-radius: 4px; }
.tax-num { display: block; font-family: var(--font); font-size: 0.65rem; letter-spacing: 0.1em; color: var(--accent); margin-bottom: 0.5rem; }
.tax-item p { color: var(--muted); font-size: 0.95rem; }
.tax-answer { font-size: 1.15rem; color: var(--text); border-left: 3px solid var(--green); padding-left: 1.5rem; max-width: 700px; }

.components { display: flex; flex-direction: column; gap: 3rem; }
.component { background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; padding: 2.5rem; transition: border-color 0.2s; }
.component:hover { border-color: var(--accent); }
.comp-header { display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.comp-num { font-family: var(--font); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--accent); background: rgba(124,92,252,0.1); border: 1px solid var(--accent); padding: 0.25rem 0.6rem; border-radius: 3px; }
.comp-header h3 { font-size: 1.5rem; font-weight: 700; color: #fff; }
.comp-lang { font-family: var(--font); font-size: 0.7rem; color: var(--muted); letter-spacing: 0.08em; margin-left: auto; }
.component > p { color: var(--muted); margin-bottom: 2rem; max-width: 700px; line-height: 1.7; }

.comp-stages { display: flex; align-items: flex-start; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.stage { background: var(--bg3); border: 1px solid var(--border); padding: 0.75rem 1rem; border-radius: 4px; min-width: 150px; flex: 1; }
.stage strong { display: block; font-size: 0.85rem; color: var(--text); margin-bottom: 0.25rem; }
.stage span { font-size: 0.75rem; color: var(--dim); }
.stage-arrow { color: var(--dim); align-self: center; font-size: 1rem; flex-shrink: 0; }

.comp-code { background: var(--bg); border: 1px solid var(--border); border-radius: 4px; overflow: hidden; }
.comp-code pre { padding: 1.25rem; overflow-x: auto; }
.comp-code code { font-family: var(--font); font-size: 0.82rem; color: var(--accent2); white-space: pre; }

.persona-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.persona-card { background: var(--bg3); border: 1px solid var(--border); padding: 1rem; border-radius: 4px; text-align: center; transition: border-color 0.2s; }
.persona-card:hover { border-color: var(--accent2); }
.persona-icon { display: block; font-size: 1.5rem; margin-bottom: 0.5rem; }
.persona-card strong { display: block; font-size: 0.85rem; color: var(--text); margin-bottom: 0.25rem; }
.persona-card span { font-size: 0.75rem; color: var(--dim); }
.constraint-box { background: rgba(124,92,252,0.07); border: 1px solid rgba(124,92,252,0.3); padding: 1rem 1.5rem; border-radius: 4px; font-size: 0.9rem; color: var(--muted); }
.constraint-box strong { color: var(--accent2); }

.twin-cycle { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; }
.cycle-item { background: var(--bg3); border: 1px solid var(--border); padding: 1.25rem; border-radius: 4px; }
.cycle-icon { display: block; font-size: 1.3rem; margin-bottom: 0.5rem; }
.cycle-item strong { display: block; font-size: 0.9rem; color: var(--text); margin-bottom: 0.35rem; }
.cycle-item span { font-size: 0.78rem; color: var(--dim); line-height: 1.5; }

.integrity-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.5rem; }
.int-item { background: var(--bg3); border: 1px solid var(--border); padding: 1.75rem; border-radius: 4px; border-top: 3px solid var(--accent3); }
.int-item h4 { font-size: 1rem; color: var(--accent3); margin-bottom: 0.75rem; }
.int-item p { font-size: 0.88rem; color: var(--muted); line-height: 1.6; }

.stack-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.5rem; }
.stack-item { background: var(--bg2); border: 1px solid var(--border); padding: 1.5rem; border-radius: 4px; }
.stack-item strong { display: block; font-size: 1.1rem; color: #fff; margin-bottom: 0.5rem; font-family: var(--font); }
.stack-item span { font-size: 0.85rem; color: var(--muted); line-height: 1.5; }

/* FOOTER */
footer { padding: 3rem 2rem; background: var(--bg); }
.footer-row { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-bottom: 1.5rem; }
.footer-row > div { display: flex; flex-direction: column; gap: 0.25rem; }
.footer-row strong { color: #fff; font-size: 1.05rem; }
.footer-row span { color: var(--muted); font-size: 0.85rem; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; flex-direction: row !important; }
.footer-links a { color: var(--muted); font-size: 0.85rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent2); text-decoration: none; }
.footer-note { font-family: var(--font); font-size: 0.7rem; letter-spacing: 0.1em; color: var(--dim); text-align: center; padding-top: 1.5rem; border-top: 1px solid var(--border); }

/* RESPONSIVE */
@media (max-width: 640px) {
  .comp-stages { flex-direction: column; }
  .stage-arrow { display: none; }
  .comp-lang { margin-left: 0; width: 100%; }
}

/* SCROLL ANIMATION */
.component, .tax-item, .int-item, .stack-item {
  opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease;
}
.component.visible, .tax-item.visible, .int-item.visible, .stack-item.visible {
  opacity: 1; transform: translateY(0);
}