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

:root {
  --bg: #080808;
  --surface: #111111;
  --surface-2: #1a1a1a;
  --border: #222222;
  --text: #f0f0f0;
  --text-muted: #888;
  --accent: #D4FF00;
  --accent-dim: rgba(212,255,0,0.12);
  --grade-s: #D4FF00;
  --grade-a: #00FF88;
  --grade-b: #00AAFF;
  --grade-c: #FF9900;
  --grade-d: #FF4466;
  --grade-f: #666;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Syne', system-ui, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.tm {
  font-size: 0.7em;
  vertical-align: super;
  opacity: 0.7;
}

/* === NAV === */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(8,8,8,0.85);
  backdrop-filter: blur(12px);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  font-family: 'DM Mono', monospace;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--accent);
}
.nav-version {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 40px 80px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 80% 30%, rgba(212,255,0,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(212,255,0,0.02) 0%, transparent 60%);
  pointer-events: none;
}
.hero-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 32px;
}
.hero-headline {
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
  color: var(--text);
}
.hero-headline br { display: block; }
.hero-sub {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 620px;
  margin-bottom: 72px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 640px;
}
.hero-stat .stat-value {
  font-family: 'DM Mono', monospace;
  font-size: 2.8rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.hero-stat .stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 160px;
}

/* === FORMULA === */
.formula {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
}
.formula-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.formula-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.formula-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 28px 32px;
  margin-bottom: 28px;
}
.formula-eq {
  font-family: 'DM Mono', monospace;
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.formula-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.formula-variants {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.variant {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 16px 20px;
}
.variant-name {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}
.variant-eq {
  font-family: 'DM Mono', monospace;
  font-size: 0.9rem;
  color: var(--text);
  display: block;
  margin-bottom: 6px;
}
.variant-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.inputs-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.inputs-list { display: flex; flex-direction: column; gap: 12px; }
.input-item {
  display: flex;
  gap: 16px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
}
.input-icon {
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
  width: 28px;
  text-align: center;
}
.input-text {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.input-text strong { color: var(--text); }

/* === GRADES === */
.grades {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.grades-header { max-width: 1200px; margin: 0 auto 48px; }
.grades-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.grades-context {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.grade-table {
  max-width: 1200px;
  margin: 0 auto;
  border: 1px solid var(--border);
}
.grade-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 80px;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  align-items: center;
  font-family: 'DM Mono', monospace;
  font-size: 0.85rem;
  transition: background 0.15s;
}
.grade-row:last-child { border-bottom: none; }
.grade-row:hover { background: var(--surface-2); }
.grade-header-row {
  background: var(--bg);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 12px 28px;
}
.col-hw strong { color: var(--text); }
.col-hw .sub { display: block; font-size: 0.72rem; color: var(--text-muted); font-weight: 300; }
.col-ceh { color: var(--text-muted); }
.col-cost { color: var(--accent); }

.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 2px;
}
.grade-s { background: rgba(212,255,0,0.15); color: var(--grade-s); }
.grade-a { background: rgba(0,255,136,0.12); color: var(--grade-a); }
.grade-b { background: rgba(0,170,255,0.12); color: var(--grade-b); }
.grade-c { background: rgba(255,153,0,0.12); color: var(--grade-c); }
.grade-d { background: rgba(255,68,102,0.12); color: var(--grade-d); }
.grade-f { background: rgba(255,255,255,0.06); color: var(--grade-f); }

.grade-scale {
  max-width: 1200px;
  margin: 32px auto 0;
  display: flex;
  gap: 0;
}
.scale-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  font-size: 0.72rem;
  font-family: 'DM Mono', monospace;
  color: var(--text-muted);
  border-right: 1px solid var(--border);
}
.scale-item:last-child { border-right: none; }

.grade-note {
  max-width: 1200px;
  margin: 28px auto 0;
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* === STAKEHOLDER SECTIONS === */
.stakeholder {
  padding: 100px 40px;
  border-top: 1px solid var(--border);
}
.stake-alt { background: var(--surface); }
.stakeholder-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}
.stakeholder-body {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.stakeholder-headline {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.stakeholder-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 28px;
}
.stakeholder-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* === VIZ BOX === */
.viz-box {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: 2px;
}
.viz-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.viz-metric {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 6px;
}
.metric-value {
  font-family: 'DM Mono', monospace;
  font-size: 3.5rem;
  font-weight: 400;
  color: var(--accent);
  line-height: 1;
}
.metric-unit {
  font-family: 'DM Mono', monospace;
  font-size: 1rem;
  color: var(--text-muted);
}
.viz-vs {
  font-family: 'DM Mono', monospace;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.viz-bar {
  height: 4px;
  background: var(--border);
  border-radius: 1px;
  margin-bottom: 16px;
}
.viz-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 1px;
  max-width: 100%;
}
.viz-conclusion {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* === INFRA GRID === */
.infra-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}
.infra-node {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 24px 20px;
  border-radius: 2px;
  text-align: center;
}
.node-label {
  font-family: 'DM Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.node-val {
  font-family: 'DM Mono', monospace;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 6px;
}
.node-sub {
  font-family: 'DM Mono', monospace;
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* === ROADMAP === */
.roadmap { display: flex; flex-direction: column; gap: 0; }
.road-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.road-item:last-child { border-bottom: none; }
.road-marker {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.road-done .road-marker { background: rgba(212,255,0,0.15); color: var(--accent); }
.road-active .road-marker { background: rgba(212,255,0,0.25); color: var(--accent); }
.road-item:not(.road-done):not(.road-active) .road-marker { background: var(--surface-2); color: var(--text-muted); }
.road-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.road-date {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* === CLOSING === */
.closing {
  padding: 120px 40px;
  border-top: 1px solid var(--border);
}
.closing-inner { max-width: 1200px; margin: 0 auto; }
.closing-eyebrow {
  font-family: 'DM Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 32px;
}
.closing-headline {
  font-size: clamp(2.5rem, 5vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 36px;
}
.closing-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 680px;
  margin-bottom: 48px;
}
.closing-traits {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.closing-traits span {
  font-family: 'DM Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  padding: 6px 16px;
  border: 1px solid rgba(212,255,0,0.25);
  border-radius: 2px;
}

/* === FOOTER === */
.footer {
  padding: 60px 40px;
  border-top: 1px solid var(--border);
}
.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 16px;
  font-family: 'DM Mono', monospace;
  font-size: 1.1rem;
  color: var(--accent);
}
.footer-tagline {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
}
.footer-meta {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  gap: 24px;
  margin-bottom: 20px;
}
.footer-cite {
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 600px;
}
.footer-cite em { font-style: italic; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .hero { padding: 120px 24px 60px; }
  .hero-stats { grid-template-columns: 1fr; gap: 24px; }
  .formula { padding: 60px 24px; }
  .formula-grid { grid-template-columns: 1fr; gap: 48px; }
  .grades { padding: 60px 24px; }
  .grade-row { grid-template-columns: 1fr 80px; gap: 8px; }
  .grade-row .col-ceh, .grade-row .col-cost { display: none; }
  .grade-scale { flex-direction: column; gap: 8px; }
  .scale-item { border-right: none; border-bottom: 1px solid var(--border); }
  .scale-item:last-child { border-bottom: none; }
  .stakeholder { padding: 60px 24px; }
  .stakeholder-body { grid-template-columns: 1fr; gap: 40px; }
  .infra-grid { grid-template-columns: 1fr; }
  .closing { padding: 80px 24px; }
  .footer { padding: 40px 24px; }
}