/* ===== RESET & ROOT ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0B0F14;
  --bg-2: #111520;
  --bg-3: #161B26;
  --fg: #F5F0E8;
  --fg-muted: #8A8A7A;
  --accent: #E8A838;
  --accent-dim: rgba(232, 168, 56, 0.12);
  --border: rgba(232, 168, 56, 0.15);
  --font-sans: 'IBM Plex Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --radius: 4px;
}

html { scroll-behavior: smooth; }

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

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.nav-logo-accent { color: var(--accent); }
.nav-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 40px 60px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.stat-tile {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.2s;
}
.stat-tile:hover { border-color: var(--accent); }
.stat-value {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 11px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: var(--font-mono);
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.hero-headline {
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 420px;
  margin-bottom: 32px;
}
.hero-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.cat-chip {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--border);
  padding: 6px 12px;
  border-radius: 2px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.5;
}
.scroll-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ===== MANIFESTO ===== */
.manifesto {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 100px 40px;
}
.manifesto-inner {
  max-width: 800px;
  margin: 0 auto;
}
.manifesto-overline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 32px;
}
.manifesto-quote {
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--fg);
  border-left: 3px solid var(--accent);
  padding-left: 28px;
  margin-bottom: 32px;
}
.manifesto-body {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.8;
  padding-left: 31px;
}

/* ===== SECTION SHARED ===== */
.section-overline {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 16px;
}
.section-heading {
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 56px;
}

/* ===== VERTICALS ===== */
.verticals {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.vertical-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.vertical-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s, transform 0.2s;
}
.vertical-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.vertical-icon { margin-bottom: 20px; opacity: 0.9; }
.vertical-name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 12px;
}
.vertical-desc {
  font-size: 13px;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}
.vertical-metric {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.metric-val {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
}
.metric-label {
  font-size: 11px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}

/* ===== PROCESS ===== */
.process {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 100px 40px;
}
.process-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.process-steps {
  display: flex;
  align-items: flex-start;
  gap: 0;
  margin-bottom: 64px;
}
.process-step { flex: 1; padding: 0 40px 0 0; }
.process-step:first-child { padding-left: 0; }
.process-connector { padding-top: 20px; flex-shrink: 0; }
.step-number {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.step-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 12px;
  line-height: 1.3;
}
.step-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.7;
}

.process-math {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 32px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.math-block {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  padding: 0 20px;
}
.math-block:first-child { padding-left: 0; }
.math-formula {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-muted);
}
.math-equals {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent);
}
.math-result {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--fg);
}

/* ===== MODEL ===== */
.model {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.model-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.model-body {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.model-highlight {
  color: var(--fg);
  font-weight: 500;
  font-size: 16px;
}

.comparison {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.comparison-header {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  gap: 8px;
}
.comp-col-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.comp-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  padding: 14px 20px;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}
.comp-row:last-child { border-bottom: none; }
.comp-row:hover { background: var(--bg-2); }
.comp-item {
  font-size: 12px;
  color: var(--fg-muted);
  font-family: var(--font-mono);
}
.comp-val {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
}
.comp-bad { color: #E84040; }
.comp-good { color: #3DBB6A; }

/* ===== CLOSING ===== */
.closing {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 120px 40px;
  text-align: center;
}
.closing-inner {
  max-width: 700px;
  margin: 0 auto;
}
.closing-headline {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 28px;
}
.closing-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 48px;
}
.closing-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.closing-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 2px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ===== FOOTER ===== */
.footer {
  padding: 60px 40px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}
.footer-logo {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--fg);
}
.footer-logo-accent { color: var(--accent); }
.footer-tagline { font-size: 13px; color: var(--fg-muted); }
.footer-note {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(138, 138, 122, 0.5);
  letter-spacing: 0.04em;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
  .vertical-grid { grid-template-columns: repeat(2, 1fr); }
  .model-split { grid-template-columns: 1fr; gap: 48px; }
  .process-steps { flex-direction: column; gap: 32px; }
  .process-connector { display: none; }
  .process-step { padding: 0; }
  .process-math { flex-direction: column; gap: 24px; }
  .math-block { padding: 0; width: 100%; }
}

@media (max-width: 768px) {
  .nav-inner { padding: 16px 24px; }
  .hero { padding: 60px 24px 40px; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .manifesto, .process, .verticals, .model { padding: 72px 24px; }
  .closing { padding: 80px 24px; }
  .footer { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .stat-tile { padding: 16px 14px; }
  .stat-value { font-size: 18px; }
}