:root {
  --bg: #faf8f4;
  --ink: #1a1a1a;
  --ink-2: #555555;
  --ink-3: #888888;
  --accent: #c97d2a;
  --accent-dim: #e8c49a;
  --code-bg: #f0ede6;
  --code-border: #d4cfc5;
  --surface: #ffffff;
  --section-bg: #f2efe9;
}

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

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

/* HERO */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 100px 80px 80px;
  border-bottom: 1px solid var(--code-border);
  min-height: 600px;
}

.hero-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.hero-headline {
  font-family: 'Fraunces', serif;
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--ink);
  margin-bottom: 28px;
  letter-spacing: -0.02em;
}

.hero-lede {
  font-size: 18px;
  color: var(--ink-2);
  max-width: 420px;
  margin-bottom: 32px;
  line-height: 1.65;
}

.hero-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 4px 10px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 4px;
  font-weight: 500;
}

/* RECEIPT BLOCK */
.receipt-block {
  background: var(--ink);
  border-radius: 12px;
  padding: 28px;
  color: #e8e4da;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  position: relative;
}

.receipt-label {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  font-family: 'JetBrains Mono', monospace;
}

.receipt-code {
  white-space: pre;
  overflow-x: auto;
}

.r-key { color: #9ecfff; }
.r-str { color: #a8e6a3; }

.receipt-chain {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #333;
}

.chain-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #444;
}

.chain-dot.active {
  background: var(--accent);
}

.chain-line {
  width: 20px;
  height: 1px;
  background: #444;
}

.chain-label {
  font-size: 11px;
  color: #888;
  margin-left: 8px;
  font-family: 'JetBrains Mono', monospace;
}

/* SECTION LABEL */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 40px;
}

/* PRIMITIVES */
.primitives {
  padding: 80px;
  background: var(--bg);
  border-bottom: 1px solid var(--code-border);
}

.primitives-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.primitive-card {
  background: var(--surface);
  padding: 40px 36px;
  border: 1px solid var(--code-border);
  border-radius: 8px;
}

.primitive-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.primitive-title {
  font-family: 'Fraunces', serif;
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.primitive-desc {
  font-size: 15px;
  color: var(--ink-2);
  line-height: 1.65;
  margin-bottom: 24px;
}

.primitive-rfcs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.primitive-rfcs span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-3);
  padding: 2px 6px;
  background: var(--section-bg);
  border-radius: 3px;
}

/* PROBLEM */
.problem {
  background: var(--ink);
  padding: 100px 80px;
}

.problem-inner { max-width: 900px; }

.problem-headline {
  font-family: 'Fraunces', serif;
  font-size: clamp(36px, 4.5vw, 58px);
  font-weight: 700;
  color: var(--bg);
  margin-bottom: 32px;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.problem-body {
  font-size: 17px;
  color: #b0aa9e;
  max-width: 680px;
  line-height: 1.75;
  margin-bottom: 56px;
}

.problem-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 48px;
  margin-bottom: 56px;
  border-top: 1px solid #333;
  padding-top: 48px;
  width: fit-content;
}

.stat-number {
  font-family: 'Fraunces', serif;
  font-size: 52px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 14px;
  color: #888;
}

.problem-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: #b0aa9e;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
}

/* OPENNESS */
.openness {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  padding: 100px 80px;
  background: var(--bg);
  border-bottom: 1px solid var(--code-border);
  align-items: center;
}

.openness-headline {
  font-family: 'Fraunces', serif;
  font-size: clamp(30px, 3.5vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.openness-sub {
  font-size: 15px;
  color: var(--ink-2);
  margin-bottom: 40px;
  line-height: 1.65;
}

.fw-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.fw-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.fw-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 4px 10px;
  background: var(--section-bg);
  border: 1px solid var(--code-border);
  border-radius: 4px;
  color: var(--ink-2);
}

/* INSTALL BLOCK */
.install-block {
  background: var(--ink);
  border-radius: 10px;
  padding: 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
}

.install-step {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #e8e4da;
  padding: 4px 0;
}

.install-prompt {
  color: var(--accent);
  font-weight: 500;
  user-select: none;
}

.install-result {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid #333;
  color: #a8e6a3;
}

.install-out { color: #a8e6a3; }

.protocol-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-3);
  margin-top: 16px;
  text-align: right;
}

/* CLOSING */
.closing {
  background: var(--section-bg);
  padding: 80px;
  text-align: center;
}

.closing-statement {
  font-family: 'Fraunces', serif;
  font-size: clamp(20px, 2.5vw, 30px);
  font-weight: 400;
  font-style: italic;
  color: var(--ink);
  max-width: 700px;
  margin: 0 auto 56px;
  line-height: 1.5;
}

.closing-builds {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.builds-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.builds-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.builds-list span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--ink-2);
}

/* FOOTER */
.footer {
  background: var(--ink);
  padding: 40px 80px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-name {
  font-family: 'Fraunces', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--bg);
  display: block;
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 13px;
  color: #666;
}

.footer-right {
  display: flex;
  gap: 24px;
}

.footer-link {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: #888;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover { color: var(--bg); }

/* RESPONSIVE */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 60px 40px;
    gap: 48px;
  }

  .primitives {
    padding: 60px 40px;
  }

  .primitives-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .problem { padding: 60px 40px; }

  .problem-stats {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .openness {
    grid-template-columns: 1fr;
    padding: 60px 40px;
    gap: 48px;
  }

  .closing { padding: 60px 40px; }

  .footer { padding: 40px; }
}

@media (max-width: 600px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }
}