/* ===========================
   CADENCE — Design System
   =========================== */

:root {
  --bg: #0A0A0F;
  --bg-surface: #111118;
  --bg-elevated: #18181F;
  --amber: #F59E0B;
  --amber-dim: rgba(245, 158, 11, 0.12);
  --amber-border: rgba(245, 158, 11, 0.25);
  --green: #22C55E;
  --green-dim: rgba(34, 197, 94, 0.1);
  --red: #EF4444;
  --slate: #64748B;
  --slate-dim: rgba(100, 116, 139, 0.15);
  --text: #F1F5F9;
  --text-muted: #94A3B8;
  --text-faint: #475569;
  --border: rgba(255,255,255,0.06);
}

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

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', 'Courier New', monospace;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: baseline;
  gap: 20px;
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--amber);
}
.nav-tagline {
  font-size: 0.75rem;
  color: var(--slate);
  letter-spacing: 0.02em;
}

/* ===== SECTION BASE ===== */
section {
  padding: 100px 32px;
}
.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 48px;
  font-family: 'DM Mono', monospace;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--border);
  padding-top: 80px;
  padding-bottom: 80px;
  background: var(--bg);
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: radial-gradient(ellipse 60% 50% at 20% 60%, rgba(245,158,11,0.04) 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: start;
}
.hero-label {
  font-size: 0.75rem;
  color: var(--slate);
  letter-spacing: 0.05em;
  margin-bottom: 32px;
}
.hero-headline {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--text);
}
.hero-headline br { display: block; }
.hero-right { padding-top: 8px; }
.hero-sub {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 420px;
}
.hero-mono {
  font-size: 0.8rem;
  color: var(--text-faint);
  line-height: 1.8;
}
.mono-comment { color: var(--text-faint); }

/* Terminal */
.hero-terminal {
  max-width: 1200px;
  margin: 60px auto 0;
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(245,158,11,0.06), 0 24px 48px rgba(0,0,0,0.4);
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #FF5F57; }
.dot.amber { background: #FEBC2E; }
.dot.green { background: #28C840; }
.terminal-title { font-size: 0.72rem; color: var(--slate); margin-left: 8px; letter-spacing: 0.02em; }
.terminal-body { padding: 20px 24px; display: flex; flex-direction: column; gap: 8px; }
.t-line { font-size: 0.8rem; line-height: 1.5; color: var(--text-muted); }
.t-ts { color: var(--text-faint); margin-right: 8px; font-size: 0.75rem; }
.t-grn { color: var(--green); }
.t-amb { color: var(--amber); }
.t-dim { color: var(--slate); }
.t-pulse { opacity: 0.6; }

/* ===== PROBLEM ===== */
.problem {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.problem-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 80px;
  align-items: start;
}
.stat-number {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 5rem;
  letter-spacing: -0.05em;
  color: var(--amber);
  line-height: 1;
  margin-bottom: 16px;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--slate);
  line-height: 1.5;
  max-width: 200px;
}
.problem-copy p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ===== HOW IT WORKS ===== */
.how-it-works {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.hiw-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.hiw-step {
  padding: 48px 40px;
  background: var(--bg);
  border: 1px solid var(--border);
}
.hiw-num {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 2.5rem;
  letter-spacing: -0.05em;
  color: var(--amber-dim);
  border: 1px solid var(--amber-border);
  display: inline-block;
  width: 56px;
  height: 56px;
  line-height: 56px;
  text-align: center;
  border-radius: 8px;
  margin-bottom: 24px;
}
.hiw-step h3 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.hiw-step p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ===== FEATURES ===== */
.features {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.feat-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
}
.feat-card {
  padding: 40px 36px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  transition: border-color 0.2s;
}
.feat-card:hover { border-color: var(--amber-border); }
.feat-icon {
  color: var(--amber);
  margin-bottom: 20px;
}
.feat-card h4 {
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.feat-card p {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--slate);
}

/* ===== MANIFESTO ===== */
.manifesto {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
blockquote {
  max-width: 1200px;
  margin: 0 auto 48px;
  font-family: 'Syne', sans-serif;
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--text);
  border-left: 3px solid var(--amber);
  padding-left: 32px;
}
.manifesto-body {
  max-width: 640px;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.manifesto-code {
  max-width: 1200px;
  margin-top: 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 28px 32px;
  font-size: 0.85rem;
  line-height: 1.8;
}
.c-keyword { color: #C792EA; }
.c-fn { color: var(--amber); }
.c-var { color: #82AAFF; }
.c-str { color: var(--green); }

/* ===== CLOSING ===== */
.closing {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}
.closing-inner {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.closing-inner h2 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 28px;
}
.closing-inner p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ===== FOOTER ===== */
.footer {
  padding: 48px 32px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--amber);
}
.footer-sub { font-size: 0.75rem; color: var(--slate); }
.footer-note { font-size: 0.8rem; color: var(--text-faint); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-headline { font-size: 3.5rem; }
  .problem-grid { grid-template-columns: 1fr; gap: 48px; }
  .stat-number { font-size: 4rem; }
  .hiw-grid { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 24px; align-items: flex-start; }
  section { padding: 72px 24px; }
}
@media (max-width: 600px) {
  .hero-headline { font-size: 2.75rem; }
  .hero-terminal { margin-top: 40px; }
  .terminal-body { padding: 14px 16px; }
  blockquote { padding-left: 20px; font-size: 1.35rem; }
  .manifesto-code { font-size: 0.75rem; padding: 20px; }
}