:root {
  --bg: #0a0e1a;
  --bg-elevated: #111729;
  --bg-card: #161d30;
  --fg: #e8e6e1;
  --fg-dim: #9a978f;
  --fg-muted: #6b6860;
  --accent: #d4a853;
  --accent-copper: #c27d38;
  --accent-glow: rgba(212, 168, 83, 0.15);
  --accent-glow-strong: rgba(212, 168, 83, 0.3);
  --border: rgba(212, 168, 83, 0.12);
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --max-width: 1140px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;
}

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

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/* NAV */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent-copper));
  color: var(--bg);
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  border-radius: 8px;
}

.nav-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--fg);
  letter-spacing: 0.02em;
}

/* HERO */
.hero {
  position: relative;
  padding: calc(var(--space-2xl) + 2rem) 2rem var(--space-xl);
  overflow: hidden;
}

.hero-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 0.8fr;
  gap: var(--space-lg);
  align-items: center;
}

.hero-label {
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: var(--space-md);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-copper), #e8c46a);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-lede {
  font-size: 1.05rem;
  color: var(--fg-dim);
  max-width: 520px;
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--accent);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* HERO VISUAL - 3D Cube Stack */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 800px;
}

.cube-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.cube {
  width: 120px;
  height: 80px;
  position: relative;
  transform-style: preserve-3d;
  transform: rotateX(-15deg) rotateY(-30deg);
}

.cube-face {
  position: absolute;
}

.cube-top {
  width: 120px;
  height: 60px;
  background: linear-gradient(135deg, rgba(212, 168, 83, 0.2), rgba(212, 168, 83, 0.08));
  border: 1px solid rgba(212, 168, 83, 0.3);
  transform: rotateX(60deg) translateZ(30px);
  border-radius: 4px;
}

.cube-front {
  width: 120px;
  height: 80px;
  background: linear-gradient(180deg, rgba(212, 168, 83, 0.12), rgba(212, 168, 83, 0.04));
  border: 1px solid rgba(212, 168, 83, 0.2);
  border-radius: 4px;
}

.cube-right {
  width: 60px;
  height: 80px;
  background: rgba(212, 168, 83, 0.06);
  border: 1px solid rgba(212, 168, 83, 0.15);
  transform: rotateY(90deg) translateZ(90px);
  border-radius: 4px;
}

.cube-label {
  position: absolute;
  bottom: -1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.cube-1 .cube-top { background: linear-gradient(135deg, rgba(212, 168, 83, 0.25), rgba(212, 168, 83, 0.1)); }
.cube-2 .cube-top { background: linear-gradient(135deg, rgba(194, 125, 56, 0.25), rgba(194, 125, 56, 0.1)); }
.cube-3 .cube-top { background: linear-gradient(135deg, rgba(232, 196, 106, 0.25), rgba(232, 196, 106, 0.1)); }

.flow-line {
  width: 2px;
  height: 24px;
  background: linear-gradient(180deg, var(--accent), transparent);
  opacity: 0.4;
}

.hero-glow {
  position: absolute;
  top: 20%;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: -1;
}

/* SECTION TAG */
.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-md);
  padding: 0.4rem 1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
}

/* THESIS */
.thesis {
  padding: var(--space-xl) 2rem;
  border-top: 1px solid var(--border);
}

.thesis-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.thesis-headline {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 400;
  line-height: 1.3;
  color: var(--fg);
  max-width: 700px;
  margin-bottom: var(--space-lg);
}

.thesis-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.thesis-col {
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s;
}

.thesis-col:hover {
  border-color: rgba(212, 168, 83, 0.3);
}

.thesis-icon {
  margin-bottom: var(--space-sm);
}

.thesis-col h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  color: var(--fg);
}

.thesis-col p {
  font-size: 0.9rem;
  color: var(--fg-dim);
  line-height: 1.7;
}

/* MECHANICS */
.mechanics {
  padding: var(--space-xl) 2rem;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-elevated) 50%, var(--bg) 100%);
}

.mechanics-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.mechanics-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  margin-bottom: var(--space-lg);
  color: var(--fg);
}

.mech-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mech-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: var(--space-md);
  padding: var(--space-md) 0;
}

.mech-number {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--accent);
  opacity: 0.4;
  line-height: 1;
  padding-top: 0.2rem;
}

.mech-content h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--fg);
  margin-bottom: 0.5rem;
}

.mech-content p {
  font-size: 0.92rem;
  color: var(--fg-dim);
  max-width: 560px;
  line-height: 1.75;
}

.mech-connector {
  margin-left: 38px;
  width: 2px;
  height: 20px;
  background: linear-gradient(180deg, var(--accent), transparent);
  opacity: 0.25;
}

/* LEVERAGE MATH */
.leverage-math {
  padding: var(--space-xl) 2rem;
  border-top: 1px solid var(--border);
}

.leverage-math-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.leverage-math-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  margin-bottom: var(--space-lg);
  color: var(--fg);
}

.comparison {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-md);
  align-items: stretch;
}

.comparison-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.card-header {
  padding: var(--space-sm) var(--space-md);
  border-bottom: 1px solid var(--border);
}

.card-badge {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.card-badge.active {
  color: var(--accent);
}

.card-body {
  padding: var(--space-md);
}

.card-row {
  display: flex;
  justify-content: space-between;
  padding: 0.6rem 0;
  font-size: 0.88rem;
  color: var(--fg-dim);
}

.card-row span:last-child {
  font-weight: 500;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.card-divider {
  height: 1px;
  background: var(--border);
  margin: 0.5rem 0;
}

.card-row.result {
  padding-top: 0.75rem;
}

.card-row.result span:first-child {
  font-weight: 500;
  color: var(--fg);
}

.card-row.result span:last-child {
  font-family: var(--font-display);
  font-size: 1.3rem;
}

.highlight {
  color: var(--accent) !important;
}

.card-row.bonus {
  padding-top: 0.25rem;
}

.card-row.bonus span {
  font-size: 0.8rem;
  color: var(--accent) !important;
  font-weight: 400 !important;
  font-style: italic;
}

.comparison-vs {
  display: flex;
  align-items: center;
  justify-content: center;
}

.comparison-vs span {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--fg-muted);
  font-style: italic;
}

.leverage-card {
  border-color: rgba(212, 168, 83, 0.25);
  box-shadow: 0 0 60px -20px var(--accent-glow);
}

.comparison-note {
  max-width: 680px;
  margin: var(--space-md) auto 0;
  text-align: center;
  font-size: 0.9rem;
  color: var(--fg-dim);
  line-height: 1.7;
}

/* RISK */
.risk {
  padding: var(--space-xl) 2rem;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg) 0%, rgba(30, 15, 15, 0.3) 50%, var(--bg) 100%);
}

.risk-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.risk-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  margin-bottom: var(--space-sm);
  color: var(--fg);
}

.risk-lede {
  font-size: 0.95rem;
  color: var(--fg-dim);
  max-width: 640px;
  margin-bottom: var(--space-lg);
  line-height: 1.8;
}

.risk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.risk-item {
  padding: var(--space-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
}

.risk-indicator {
  width: 32px;
  height: 4px;
  border-radius: 2px;
  margin-bottom: var(--space-sm);
}

.risk-indicator.down { background: #c25038; }
.risk-indicator.balance { background: var(--accent); }
.risk-indicator.up { background: #4a9e6a; }

.risk-item h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  color: var(--fg);
}

.risk-item p {
  font-size: 0.88rem;
  color: var(--fg-dim);
  line-height: 1.7;
}

/* CLOSING */
.closing {
  position: relative;
  padding: var(--space-2xl) 2rem;
  text-align: center;
  overflow: hidden;
}

.closing-inner {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  line-height: 1.3;
  color: var(--fg);
  margin-bottom: var(--space-md);
}

.closing-text {
  font-size: 1rem;
  color: var(--fg-dim);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.8;
}

.closing-glow {
  position: absolute;
  bottom: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

/* FOOTER */
.footer {
  border-top: 1px solid var(--border);
  padding: var(--space-md) 2rem;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero { padding: calc(var(--space-xl) + 2rem) 1.25rem var(--space-lg); }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-md); }
  .hero-visual { display: none; }
  .hero-stats { flex-direction: column; gap: var(--space-sm); align-items: flex-start; }
  .stat-divider { width: 40px; height: 1px; }
  .thesis-columns { grid-template-columns: 1fr; }
  .comparison { grid-template-columns: 1fr; }
  .comparison-vs { padding: var(--space-xs) 0; }
  .risk-grid { grid-template-columns: 1fr; }
  .mech-step { grid-template-columns: 50px 1fr; gap: var(--space-sm); }
  .mech-connector { margin-left: 24px; }
  .mech-number { font-size: 1.5rem; }
  section { padding-left: 1.25rem; padding-right: 1.25rem; }
  .nav { padding: 1rem 1.25rem; }
  .footer-inner { flex-direction: column; gap: var(--space-sm); text-align: center; }
}