:root {
  --bg: #f5f4f0;
  --bg-alt: #eceae4;
  --fg: #1a1917;
  --fg-muted: #6b6861;
  --fg-faint: #a8a49d;
  --accent: #c97d2e;
  --accent-dim: #e8b470;
  --border: #d8d5ce;
  --surface: #ffffff;
  --nav-h: 64px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--fg-faint); border-radius: 3px; }

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(245,244,240,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-logo svg { color: var(--accent); }
.nav-tag {
  font-size: 13px;
  color: var(--fg-muted);
  font-weight: 400;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 60px) 40px 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(201,125,46,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.hero-left { max-width: 560px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 12px 5px 8px;
  margin-bottom: 32px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}
.hero-headline {
  font-family: 'Syne', sans-serif;
  font-size: clamp(44px, 5vw, 72px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--fg);
  margin-bottom: 28px;
}
.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 36px;
  max-width: 500px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag {
  font-size: 12px;
  color: var(--fg-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-weight: 500;
}

/* ── Brain Visualization ── */
.hero-right {
  display: flex;
  justify-content: center;
  align-items: center;
}
.brain-viz {
  position: relative;
  width: 360px;
  height: 360px;
}
.brain-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.brain-ring-1 { width: 200px; height: 200px; border-color: rgba(201,125,46,0.25); animation: spin-slow 20s linear infinite; }
.brain-ring-2 { width: 280px; height: 280px; border-color: rgba(201,125,46,0.15); animation: spin-slow 30s linear infinite reverse; }
.brain-ring-3 { width: 360px; height: 360px; border-color: rgba(201,125,46,0.08); }
@keyframes spin-slow { from { transform: translate(-50%,-50%) rotate(0deg); } to { transform: translate(-50%,-50%) rotate(360deg); } }
.brain-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 96px; height: 96px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  box-shadow: 0 0 0 8px rgba(201,125,46,0.05);
}
.brain-nodes { position: absolute; inset: 0; }
.brain-node {
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 500;
  color: var(--fg-muted);
  white-space: nowrap;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  animation: float 6s ease-in-out infinite;
}
.brain-node::before {
  content: '';
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.node-1 { top: 60px; left: 20px; animation-delay: 0s; }
.node-1::before { right: -18px; top: 50%; transform: translateY(-50%); }
.node-2 { top: 60px; right: 20px; animation-delay: 1s; }
.node-2::before { left: -18px; top: 50%; transform: translateY(-50%); }
.node-3 { bottom: 70px; left: 50%; transform: translateX(-50%); animation-delay: 2s; }
.node-3::before { top: -18px; left: 50%; transform: translateX(-50%); }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--fg-faint);
}

/* ── Proof ── */
.proof {
  background: var(--fg);
  color: var(--bg);
  padding: 64px 40px;
}
.proof-inner { max-width: 1200px; margin: 0 auto; }
.proof-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.stat { padding: 0 64px; text-align: center; }
.stat-value {
  font-family: 'Syne', sans-serif;
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--bg);
  display: block;
  line-height: 1;
  margin-bottom: 12px;
}
.stat-label {
  font-size: 13px;
  color: var(--fg-faint);
  max-width: 200px;
  line-height: 1.5;
}
.proof-divider {
  width: 1px;
  height: 80px;
  background: rgba(255,255,255,0.1);
}

/* ── How ── */
.how {
  padding: 120px 40px;
  background: var(--bg);
}
.how-inner { max-width: 1200px; margin: 0 auto; }
.section-header {
  text-align: center;
  margin-bottom: 80px;
}
.section-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 20px;
}
.section-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}
.how-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.step {
  flex: 1;
  padding: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.step-connector {
  width: 48px;
  height: 1px;
  background: var(--border);
  margin-top: 60px;
  flex-shrink: 0;
}
.step-num {
  font-family: 'Syne', sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 20px;
}
.step-title {
  font-family: 'Syne', sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 12px;
}
.step-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ── Features ── */
.features {
  padding: 100px 40px;
  background: var(--bg-alt);
}
.features-inner { max-width: 1200px; margin: 0 auto; }
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
}
.feature-card {
  background: var(--bg-alt);
  padding: 48px;
}
.feature-card.feature-right { background: var(--surface); }
.feature-icon {
  width: 44px; height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 24px;
}
.feature-title {
  font-family: 'Syne', sans-serif;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 12px;
}
.feature-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ── Manifesto ── */
.manifesto {
  padding: 120px 40px;
  background: var(--fg);
}
.manifesto-inner { max-width: 900px; margin: 0 auto; }
.manifesto-quote blockquote p {
  font-family: 'Syne', sans-serif;
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 500;
  line-height: 1.5;
  color: var(--bg);
  letter-spacing: -0.02em;
}

/* ── Closing ── */
.closing {
  padding: 140px 40px;
  background: var(--bg);
  text-align: center;
}
.closing-inner { max-width: 700px; margin: 0 auto; }
.closing-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--fg);
  line-height: 1.1;
  margin-bottom: 20px;
}
.closing-sub {
  font-size: 20px;
  color: var(--fg-muted);
  margin-bottom: 60px;
}
.closing-product {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}
.product-name {
  font-family: 'Syne', sans-serif;
  font-size: 28px;
  font-weight: 800;
  color: var(--fg);
  letter-spacing: -0.03em;
}
.product-status {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(201,125,46,0.1);
  border: 1px solid rgba(201,125,46,0.3);
  padding: 5px 12px;
  border-radius: 100px;
}

/* ── Footer ── */
.footer {
  padding: 40px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 15px;
  color: var(--fg);
}
.footer-brand svg { color: var(--accent); }
.footer-tagline {
  font-size: 13px;
  color: var(--fg-faint);
}
.footer-copy {
  font-size: 12px;
  color: var(--fg-faint);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 60px; }
  .hero-right { display: none; }
  .proof-stats { flex-direction: column; gap: 40px; }
  .proof-divider { width: 60px; height: 1px; }
  .how-steps { flex-direction: column; gap: 20px; }
  .step-connector { width: 40px; height: 1px; margin-top: 0; }
  .features-grid { grid-template-columns: 1fr; }
  .nav-inner { padding: 0 20px; }
  .nav-tag { display: none; }
  .hero { padding: calc(var(--nav-h) + 40px) 20px 80px; }
  .proof { padding: 60px 20px; }
  .how { padding: 80px 20px; }
  .features { padding: 80px 20px; }
  .manifesto { padding: 80px 20px; }
  .closing { padding: 80px 20px; }
  .stat { padding: 0; }
  .footer-inner { flex-direction: column; gap: 16px; text-align: center; }
  .feature-card { padding: 32px; }
}
@media (max-width: 480px) {
  .hero-headline { font-size: 40px; }
  .hero-tags { gap: 6px; }
  .closing-title { font-size: 32px; }
}