:root {
  --bg: #F5F0E8;
  --fg: #1C1C1A;
  --accent: #D4621A;
  --accent-light: #F0E5D8;
  --muted: #7A7067;
  --border: #E0D9CE;
  --white: #FFFFFF;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.site-header {
  padding: 20px 40px;
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1.4rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.tagline {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ── Hero ── */
.hero {
  padding: 80px 40px 0;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 20px;
}
.hero-text h1 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: clamp(2.6rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 28px;
  font-weight: 400;
}
.lede {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 420px;
  font-weight: 300;
}

/* Step cards */
.step-cards {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.step-card {
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
}
.step-card:first-child { border-top: 1px solid var(--border); }
.step-num {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 2.2rem;
  color: var(--accent);
  opacity: 0.5;
  line-height: 1;
  min-width: 44px;
  padding-top: 4px;
}
.step-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.step-content p {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}

.hero-rule {
  height: 1px;
  background: var(--border);
  margin: 60px 0 0;
}

/* ── Problem/Solution ── */
.problem-solution {
  padding: 80px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.ps-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 60px;
  align-items: start;
}
.ps-divider {
  width: 1px;
  background: var(--border);
  align-self: stretch;
}
.ps-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 16px;
}
.ps-col h2 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1.75rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  font-weight: 400;
}
.ps-col p {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.ps-col p:last-child { margin-bottom: 0; }

/* ── How It Works ── */
.how-it-works {
  padding: 80px 40px;
  background: var(--fg);
  color: var(--bg);
}
.hiw-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.hiw-inner .section-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 16px;
}
.hiw-inner h2 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 2.2rem;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 60px;
  font-weight: 400;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.hiw-step {
  border-top: 1px solid rgba(245,240,232,0.2);
  padding-top: 28px;
}
.hiw-num {
  display: block;
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 2.5rem;
  color: var(--accent);
  opacity: 0.6;
  line-height: 1;
  margin-bottom: 20px;
}
.hiw-step h3 {
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.hiw-step p {
  font-size: 0.88rem;
  color: rgba(245,240,232,0.55);
  line-height: 1.6;
}

/* ── Library ── */
.library {
  padding: 80px 40px;
  max-width: 1200px;
  margin: 0 auto;
}
.lib-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
}
.lib-header .section-label {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 16px;
}
.lib-header h2 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 2.2rem;
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 400;
}
.lib-subhead {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 480px;
  margin-top: 12px;
}
.category-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-bottom: 32px;
}
.category-card {
  background: var(--bg);
  padding: 32px 28px;
}
.category-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.category-card p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 16px;
}
.category-count {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.03em;
}
.lib-note {
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

/* ── Closing ── */
.closing {
  padding: 100px 40px;
  text-align: center;
  border-top: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}
.closing-inner h2 {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 24px;
  font-weight: 400;
}
.closing-inner p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 40px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
.footer-logo {
  font-family: 'Instrument Serif', Georgia, serif;
  font-size: 1.2rem;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.footer-copy {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}
.footer-tagline {
  font-size: 0.78rem;
  color: var(--border);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .site-header { padding: 16px 24px; }
  .hero { padding: 56px 24px 0; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .ps-inner { grid-template-columns: 1fr; gap: 40px; }
  .ps-divider { display: none; }
  .steps-grid { grid-template-columns: 1fr; gap: 32px; }
  .category-grid { grid-template-columns: 1fr 1fr; }
  .how-it-works { padding: 60px 24px; }
  .library { padding: 60px 24px; }
  .problem-solution { padding: 60px 24px; }
  .closing { padding: 60px 24px; }
  .site-footer { padding: 40px 24px; }
}
@media (max-width: 600px) {
  .category-grid { grid-template-columns: 1fr; }
}