:root {
  --bg: #0a0a12;
  --surface: #11111f;
  --surface-2: #181830;
  --fg: #f0ece0;
  --fg-muted: #8a8778;
  --accent: #f59e0b;
  --accent-dim: rgba(245, 158, 11, 0.12);
  --border: rgba(240, 236, 224, 0.08);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── HEADER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 18, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.wordmark {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--fg);
  letter-spacing: -0.02em;
}
.site-header nav { display: flex; gap: 32px; }
.site-header nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.site-header nav a:hover { color: var(--fg); }

/* ── HERO ── */
.hero {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px 96px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 5vw, 4.2rem);
  font-weight: 900;
  line-height: 1.05;
  color: var(--fg);
  margin-bottom: 28px;
}
.hero-accent { color: var(--accent); }
.hero-sub {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}
.hero-stat-row {
  display: flex;
  gap: 40px;
}
.hero-stat { display: flex; flex-direction: column; gap: 4px; }
.stat-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label { font-size: 0.78rem; color: var(--fg-muted); line-height: 1.4; }

/* Path Visual */
.path-visual {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.path-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: border-color 0.2s;
}
.path-node:hover { border-color: var(--accent); }
.node-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.node-label {
  flex: 1;
  font-weight: 600;
  font-size: 0.95rem;
}
.node-rev {
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-weight: 500;
  background: var(--surface-2);
  padding: 4px 10px;
  border-radius: 20px;
}

/* ── SECTION SHARED ── */
.section-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.section-heading {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
}
.section-sub {
  color: var(--fg-muted);
  font-size: 1rem;
  max-width: 560px;
  line-height: 1.7;
}

/* ── MODELS ── */
.models {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px 96px;
}
.models-grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.model-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.25s;
}
.model-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.25s;
}
.model-card:hover { border-color: rgba(245, 158, 11, 0.35); }
.model-card:hover::before { opacity: 1; }
.model-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.model-icon { color: var(--accent); margin-bottom: 20px; }
.model-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--fg);
}
.model-desc {
  color: var(--fg-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 28px;
}
.model-stats {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  padding: 20px;
  background: var(--surface-2);
  border-radius: 12px;
}
.model-stat { display: flex; gap: 12px; align-items: baseline; }
.ms-val {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--accent);
  min-width: 90px;
}
.ms-key { font-size: 0.8rem; color: var(--fg-muted); }
.model-verdict {
  font-size: 0.85rem;
  color: var(--fg-muted);
  font-style: italic;
  border-left: 2px solid var(--accent);
  padding-left: 14px;
}

/* ── WHY ── */
.why {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.why-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.why-heading { margin-bottom: 24px; }
.why-body { color: var(--fg-muted); font-size: 0.98rem; line-height: 1.75; margin-bottom: 20px; }
.why-data { display: flex; flex-direction: column; gap: 0; }
.data-block {
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}
.data-block:first-child { padding-top: 0; }
.data-block:last-child { border-bottom: none; }
.data-big {
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 6px;
}
.data-note { font-size: 0.85rem; color: var(--fg-muted); }

/* ── MANIFESTO ── */
.manifesto {
  max-width: 1100px;
  margin: 0 auto;
  padding: 96px 32px;
}
.manifesto-inner { max-width: 740px; }
.manifesto-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
  font-weight: 400;
  font-style: italic;
  line-height: 1.35;
  color: var(--fg);
  border-left: 3px solid var(--accent);
  padding-left: 32px;
  margin-bottom: 36px;
}
.manifesto-body { color: var(--fg-muted); font-size: 1rem; line-height: 1.75; margin-bottom: 20px; }

/* ── CLOSING ── */
.closing {
  background: linear-gradient(135deg, var(--surface) 0%, #1a1535 100%);
  border-top: 1px solid var(--border);
}
.closing-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 100px 32px;
  text-align: center;
}
.closing-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
}
.closing-sub {
  color: var(--fg-muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── SIGNUP FORM ── */
.signup-wrapper {
  max-width: 480px;
  margin: 36px auto 0;
}
.signup-row {
  display: flex;
  gap: 10px;
}
.signup-input {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}
.signup-input::placeholder { color: var(--fg-muted); }
.signup-input:focus { border-color: var(--accent); }
.signup-btn {
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 14px 28px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
  transition: opacity 0.2s;
}
.signup-btn:hover { opacity: 0.9; }
.signup-btn:disabled { opacity: 0.6; cursor: not-allowed; }
.signup-error {
  margin-top: 12px;
  color: #ef4444;
  font-size: 0.88rem;
}
.signup-success {
  margin-top: 16px;
  padding: 16px 20px;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 10px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  text-align: center;
}
.signup-note {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--fg-muted);
}

/* ── FOOTER ── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 32px 48px;
  display: flex;
  justify-content: space-between;
  gap: 48px;
}
.footer-brand .wordmark { font-size: 1.2rem; }
.footer-tagline { color: var(--fg-muted); font-size: 0.85rem; margin-top: 8px; }
.footer-links { display: flex; gap: 64px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col-head {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.footer-col a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--fg); }
.footer-bottom {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 32px;
  border-top: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--fg-muted);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding: 60px 24px 72px; }
  .hero-visual { order: -1; }
  .hero-stat-row { gap: 24px; }
  .why-inner { grid-template-columns: 1fr; gap: 48px; }
  .models-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 40px; }
}
@media (max-width: 480px) {
  .site-header nav { display: none; }
  .hero-stat-row { flex-wrap: wrap; }
  .hero-headline { font-size: 2.4rem; }
  .signup-row { flex-direction: column; }
  .signup-btn { width: 100%; }
}