:root {
  --bg: #f8f5f0;
  --bg-dark: #0d1b2a;
  --fg: #1a1a1a;
  --fg-light: #f8f5f0;
  --accent: #d4a017;
  --accent-dark: #a07810;
  --text-muted: #6b6b6b;
  --border: #e0dcd5;
  --card-bg: #ffffff;
  --ai-bg: #f0eff9;
  --human-bg: #fef9ec;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'Source Sans 3', sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: 'Playfair Display', serif; }

/* Hero */
.hero {
  background: var(--bg-dark);
  color: var(--fg-light);
  padding: 80px 60px 100px;
  overflow: hidden;
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 700;
}

.hero-headline {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  color: #f8f5f0;
}

.hero-sub {
  font-size: 18px;
  color: #b0aaa0;
  max-width: 480px;
  line-height: 1.7;
}

.hero-sub em {
  color: var(--accent);
  font-style: normal;
}

/* Newsletter Card */
.newsletter-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,0.4);
  font-size: 13px;
}

.card-header {
  background: var(--bg-dark);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-date {
  color: #b0aaa0;
  font-size: 11px;
  letter-spacing: 0.05em;
}

.card-tag {
  background: var(--accent);
  color: var(--bg-dark);
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.05em;
}

.card-items { padding: 0; }

.card-item {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}

.card-item:last-child { border-bottom: none; }

.item-source {
  display: block;
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-dark);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.item-headline {
  display: block;
  font-weight: 600;
  color: var(--fg);
  margin-bottom: 6px;
  font-size: 12.5px;
  line-height: 1.4;
}

.item-alpha {
  display: block;
  color: #4a6fa5;
  font-size: 12px;
  line-height: 1.5;
  font-style: italic;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

.card-footer {
  background: #f5f3ee;
  padding: 10px 18px;
  text-align: center;
}

.curator-badge {
  font-size: 11px;
  color: var(--text-muted);
  font-style: italic;
}

/* Demonstration */
.demonstration {
  padding: 80px 60px;
  background: #ffffff;
}

.demo-inner { max-width: 1000px; margin: 0 auto; }

.demo-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 16px;
}

.demo-headline {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 48px;
  line-height: 1.2;
}

.demo-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.demo-column { padding: 32px; }
.demo-column--ai { background: var(--ai-bg); }
.demo-column--human { background: var(--human-bg); }

.col-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.ai-label { color: #6b6b9f; }
.human-label { color: var(--accent-dark); }

.signal-block {}

.signal-title {
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 6px;
  line-height: 1.4;
}

.signal-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.alpha-block .signal-title { color: var(--fg); }

.alpha-text {
  font-size: 14px;
  color: #2a4a6a;
  line-height: 1.6;
  font-style: italic;
  margin-top: 8px;
}

/* Manifesto */
.manifesto {
  padding: 90px 60px;
  background: var(--bg);
}

.manifesto-inner { max-width: 720px; margin: 0 auto; }

.manifesto-headline {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 32px;
  line-height: 1.2;
}

.manifesto-body p {
  font-size: 17px;
  color: #3a3a3a;
  line-height: 1.8;
  margin-bottom: 20px;
}

.manifesto-body em {
  font-style: italic;
  color: var(--fg);
}

/* Structure */
.structure {
  padding: 90px 60px;
  background: #ffffff;
}

.structure-inner { max-width: 1100px; margin: 0 auto; }

.structure-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 16px;
}

.structure-headline { display: none; }

.structure-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
}

.structure-item {
  padding: 32px 28px 32px 0;
  border-right: 1px solid var(--border);
  padding-right: 28px;
}

.structure-item:last-child { border-right: none; }

.structure-num {
  font-size: 40px;
  font-weight: 900;
  font-family: 'Playfair Display', serif;
  color: var(--accent);
  margin-bottom: 16px;
  line-height: 1;
}

.structure-title {
  font-size: 16px;
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  margin-bottom: 10px;
}

.structure-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Pricing */
.pricing {
  padding: 90px 60px;
  background: var(--bg);
}

.pricing-inner { max-width: 600px; margin: 0 auto; text-align: center; }

.pricing-label {
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-dark);
  font-weight: 700;
  margin-bottom: 16px;
}

.pricing-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  text-align: left;
}

.pricing-tier {
  padding: 48px;
}

.tier-name {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 12px;
}

.tier-price {
  margin-bottom: 16px;
}

.price-amount {
  font-family: 'Playfair Display', serif;
  font-size: 52px;
  font-weight: 900;
  color: var(--fg);
}

.price-period {
  font-size: 18px;
  color: var(--text-muted);
  margin-left: 4px;
}

.tier-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.6;
}

.tier-features {
  list-style: none;
  margin-bottom: 32px;
}

.tier-features li {
  font-size: 15px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  color: var(--fg);
  display: flex;
  align-items: center;
  gap: 10px;
}

.tier-features li::before {
  content: '';
  display: inline-block;
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}

.tier-revenue {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 2px solid var(--bg-dark);
}

.revenue-label {
  font-family: 'Playfair Display', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--bg-dark);
}

/* Closing */
.closing {
  padding: 100px 60px;
  background: var(--bg-dark);
  color: var(--fg-light);
  text-align: center;
}

.closing-inner { max-width: 800px; margin: 0 auto; }

.closing-headline {
  font-size: clamp(28px, 4.5vw, 46px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 24px;
  color: #f8f5f0;
}

.closing-sub {
  font-size: 17px;
  color: #b0aaa0;
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto;
}

/* Footer */
.footer {
  background: #0a1620;
  padding: 40px 60px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {}

.footer-name {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 16px;
  color: #f8f5f0;
  display: block;
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 13px;
  color: #6b7068;
}

.footer-meta {
  font-size: 13px;
  color: #4a4f47;
}

/* Mobile */
@media (max-width: 768px) {
  .hero { padding: 60px 24px 80px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-sub { font-size: 16px; }
  .demonstration, .manifesto, .structure, .pricing, .closing { padding: 60px 24px; }
  .demo-comparison { grid-template-columns: 1fr; }
  .demo-column--ai { border-bottom: 1px solid var(--border); }
  .structure-grid { grid-template-columns: 1fr 1fr; gap: 0; }
  .structure-item { border-right: 1px solid var(--border); padding: 24px 16px; }
  .structure-item:nth-child(2n) { border-right: none; }
  .structure-item:nth-child(3), .structure-item:nth-child(4) { border-top: 1px solid var(--border); }
  .pricing-tier { padding: 32px 24px; }
  .footer-inner { flex-direction: column; gap: 16px; align-items: flex-start; }
  .footer { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .structure-grid { grid-template-columns: 1fr; }
  .structure-item { border-right: none; border-bottom: 1px solid var(--border); padding: 20px 0; }
  .structure-item:nth-child(3), .structure-item:nth-child(4) { border-top: none; }
}