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

:root {
  --bg: #0f1114;
  --bg-2: #161a1f;
  --bg-3: #1c2127;
  --fg: #e8edf2;
  --fg-muted: #8a949e;
  --accent: #f5a623;
  --accent-dim: rgba(245, 166, 35, 0.15);
  --steel: #3a7fc1;
  --steel-dim: rgba(58, 127, 193, 0.12);
  --border: rgba(255,255,255,0.07);
  --font-display: 'Russo One', sans-serif;
  --font-body: 'IBM Plex Sans', sans-serif;
}

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;
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 40px;
  background: rgba(15, 17, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 60px;
  display: flex;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 0.05em;
  color: var(--fg);
}

.logo-ai {
  color: var(--accent);
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--bg);
  position: relative;
  overflow: hidden;
  padding: 120px 40px 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(58,127,193,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-label::before {
  content: '';
  display: block;
  width: 32px;
  height: 2px;
  background: var(--accent);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(52px, 7vw, 96px);
  line-height: 1.0;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin-bottom: 28px;
  max-width: 700px;
}

.hero-sub {
  font-size: 18px;
  color: var(--fg-muted);
  max-width: 540px;
  line-height: 1.7;
  margin-bottom: 48px;
  font-weight: 300;
}

.hero-tracks {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.track-line {
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--steel));
  border-radius: 2px;
}

.track-spike {
  width: 3px;
  height: 14px;
  background: var(--accent);
  border-radius: 1px;
}

/* === PROBLEM === */
.problem {
  background: var(--bg-2);
  padding: 100px 40px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.problem-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.problem-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.problem-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 44px);
  line-height: 1.2;
  color: var(--fg);
}

.problem-right {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.problem-stat {
  border-left: 2px solid var(--accent);
  padding-left: 24px;
}

.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 40px;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.5;
  font-weight: 300;
}

/* === FEATURES === */
.features {
  background: var(--bg);
  padding: 100px 40px;
}

.features-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 60px;
}

.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 16px;
}

.section-headline {
  font-family: var(--font-display);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.2;
  color: var(--fg);
  max-width: 600px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.feature-card {
  background: var(--bg-2);
  padding: 40px;
}

.feature-icon {
  margin-bottom: 20px;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--fg);
  letter-spacing: 0.03em;
}

.feature-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
  font-weight: 300;
}

/* === DIFFERENTIATORS === */
.differentiators {
  background: var(--bg-3);
  padding: 80px 40px;
}

.diff-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
}

.diff-item {}

.diff-num {
  font-family: var(--font-display);
  font-size: 48px;
  color: var(--accent-dim);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.diff-item h3 {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--fg);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.diff-item p {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.7;
  font-weight: 300;
}

/* === MANIFESTO === */
.manifesto {
  background: var(--bg);
  padding: 100px 40px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.manifesto-inner {
  max-width: 900px;
  margin: 0 auto;
}

.manifesto-quote {
  font-family: var(--font-display);
  font-size: clamp(22px, 2.8vw, 34px);
  line-height: 1.35;
  color: var(--fg);
  margin-bottom: 36px;
  letter-spacing: 0.01em;
}

.manifesto-body {
  font-size: 16px;
  color: var(--fg-muted);
  line-height: 1.8;
  font-weight: 300;
  margin-bottom: 20px;
}

/* === CLOSING === */
.closing {
  background: linear-gradient(135deg, #0f1114 0%, #131820 100%);
  padding: 120px 40px;
}

.closing-inner {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.1;
  color: var(--fg);
  margin-bottom: 28px;
  letter-spacing: -0.01em;
}

.closing-sub {
  font-size: 17px;
  color: var(--fg-muted);
  line-height: 1.7;
  font-weight: 300;
  max-width: 600px;
  margin: 0 auto;
}

/* === FOOTER === */
.footer {
  background: var(--bg-2);
  padding: 48px 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-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.05em;
  color: var(--fg);
}

.footer-ai { color: var(--accent); }

.footer-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  font-weight: 300;
}

.footer-copy {
  font-size: 12px;
  color: rgba(138,148,158,0.5);
  margin-top: 8px;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav { padding: 0 20px; }
  .hero { padding: 100px 20px 60px; }
  .problem { padding: 60px 20px; }
  .problem-inner { grid-template-columns: 1fr; gap: 48px; }
  .features { padding: 60px 20px; }
  .feature-grid { grid-template-columns: 1fr; }
  .differentiators { padding: 60px 20px; }
  .diff-grid { grid-template-columns: 1fr; gap: 36px; }
  .manifesto { padding: 60px 20px; }
  .closing { padding: 80px 20px; }
  .footer { padding: 40px 20px; }
}