:root {
  --bg: #09090b;
  --surface: #111113;
  --border: #222225;
  --fg: #fafafa;
  --fg-2: #a1a1aa;
  --fg-3: #52525b;
  --accent: #4ade80;
  --accent-dim: #166534;
  --accent-glow: rgba(74, 222, 128, 0.08);
}

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

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── Header ── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 clamp(1.5rem, 4vw, 4rem);
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.header-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-tag {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px clamp(1.5rem, 4vw, 4rem) 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center, rgba(74, 222, 128, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-label {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  border: 1px solid var(--accent-dim);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
}
.hero-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(3.5rem, 8vw, 7rem);
  line-height: 1.0;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: 2rem;
  max-width: 700px;
}
.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  color: var(--fg-2);
  max-width: 540px;
  line-height: 1.65;
  margin-bottom: 3.5rem;
  font-weight: 300;
}
.hero-proof {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.proof-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.proof-num {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.75rem;
  color: var(--accent);
  letter-spacing: -0.03em;
}
.proof-label {
  font-size: 0.72rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.proof-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ── Manifesto ── */
.manifesto {
  padding: clamp(4rem, 8vw, 8rem) clamp(1.5rem, 4vw, 4rem);
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.manifesto-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: start;
}
.manifesto-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  padding-top: 0.5rem;
}
.manifesto-body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.manifesto-body p {
  font-size: 1.05rem;
  color: var(--fg-2);
  line-height: 1.75;
  font-weight: 300;
}

/* ── Features ── */
.features {
  padding: clamp(4rem, 8vw, 8rem) clamp(1.5rem, 4vw, 4rem);
}
.features-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.features-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 3rem;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5px;
  background: var(--border);
  border: 1px solid var(--border);
}
.feature-card {
  background: var(--bg);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: background 0.2s;
}
.feature-card:hover {
  background: var(--surface);
}
.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
}
.feature-title {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.feature-desc {
  font-size: 0.9rem;
  color: var(--fg-2);
  line-height: 1.65;
  font-weight: 300;
}

/* ── Closing ── */
.closing {
  padding: clamp(5rem, 10vw, 10rem) clamp(1.5rem, 4vw, 4rem);
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.closing-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.closing-eyebrow {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-3);
  margin-bottom: 2rem;
}
.closing-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2.5rem, 5.5vw, 5rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: 2.5rem;
  max-width: 700px;
}
.closing-body {
  font-size: 1.05rem;
  color: var(--fg-2);
  line-height: 1.75;
  font-weight: 300;
  max-width: 640px;
  margin-bottom: 3rem;
}
.closing-tag {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.tag-pill {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--fg-2);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.4rem 1rem;
  border-radius: 999px;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem clamp(1.5rem, 4vw, 4rem);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}
.footer-wordmark {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.footer-tagline {
  font-size: 0.7rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.footer-meta {
  font-size: 0.8rem;
  color: var(--fg-3);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.footer-dot { color: var(--border); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .manifesto-inner { grid-template-columns: 1fr; gap: 1.5rem; }
  .hero-proof { gap: 1.5rem; }
  .proof-divider { display: none; }
  .hero { padding-top: 100px; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .hero-headline { font-size: 3rem; }
  .closing-headline { font-size: 2rem; }
}