/* Base */
:root {
  --bg: #F7F4EF;
  --bg-alt: #F0ECE3;
  --fg: #0F1C2E;
  --fg-muted: #4A5568;
  --accent: #E8A838;
  --accent-dark: #C4922E;
  --border: #DDD8CE;
  --card-bg: #FFFFFF;
}

* { 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;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  font-weight: 600;
  line-height: 1.2;
}

/* Navigation */
.nav {
  padding: 24px 48px;
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-logo {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--fg);
}
.nav-tagline {
  font-size: 13px;
  color: var(--fg-muted);
  letter-spacing: 0.03em;
}

/* Hero */
.hero {
  padding: 80px 48px 64px;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-inner {
  max-width: 680px;
}
.hero-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 20px;
}
.hero-headline {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 24px;
  line-height: 1.1;
}
.hero-lede {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  max-width: 540px;
}

/* Stats bar */
.stats-bar {
  background: var(--fg);
  color: #fff;
  padding: 32px 48px;
}
.stats-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

/* Section label */
.section-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: 16px;
}

/* Problem */
.problem {
  padding: 80px 48px;
  background: var(--bg-alt);
}
.problem-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}
.problem-item {
  padding: 32px;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border);
}
.problem-stat {
  font-family: 'Playfair Display', serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--fg);
  display: block;
  margin-bottom: 12px;
}
.problem-text {
  font-size: 15px;
  color: var(--fg-muted);
  margin-bottom: 8px;
}
.problem-src {
  font-size: 12px;
  color: var(--accent-dark);
  font-weight: 600;
}
.problem-callout {
  background: var(--fg);
  color: #fff;
  padding: 28px 36px;
  border-radius: 12px;
  font-size: 17px;
  line-height: 1.55;
}

/* How */
.how {
  padding: 80px 48px;
}
.how-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.how-intro {
  font-size: 20px;
  color: var(--fg-muted);
  max-width: 640px;
  margin-bottom: 56px;
  line-height: 1.65;
}
.how-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}
.step {
  position: relative;
}
.step-num {
  font-family: 'Playfair Display', serif;
  font-size: 48px;
  font-weight: 700;
  color: var(--border);
  display: block;
  margin-bottom: 16px;
  line-height: 1;
}
.step-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}
.step-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* Cases */
.cases {
  padding: 80px 48px;
  background: var(--bg-alt);
}
.cases-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 36px;
  border: 1px solid var(--border);
}
.case-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  display: block;
  margin-bottom: 16px;
}
.case-title {
  font-size: 20px;
  margin-bottom: 12px;
  line-height: 1.3;
}
.case-insight {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* Validation */
.validation {
  padding: 80px 48px;
}
.validation-inner {
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}
.validation-sub {
  font-size: 17px;
  color: var(--fg-muted);
  margin-bottom: 48px;
}
.val-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}
.val-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 32px;
}
.val-metric {
  font-family: 'Playfair Display', serif;
  font-size: 42px;
  font-weight: 700;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}
.val-label {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}
.val-desc {
  font-size: 13px;
  color: var(--fg-muted);
}
.val-callout {
  font-size: 14px;
  color: var(--fg-muted);
  font-style: italic;
  border-top: 1px solid var(--border);
  padding-top: 32px;
  max-width: 560px;
  margin: 0 auto;
}

/* Personas */
.personas {
  padding: 80px 48px;
  background: var(--bg-alt);
}
.personas-inner {
  max-width: 1200px;
  margin: 0 auto;
}
.personas-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.persona {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.persona-avatar {
  width: 100%;
}
.persona-name {
  font-size: 14px;
  font-weight: 600;
}
.persona-meta {
  font-size: 11px;
  color: var(--fg-muted);
  line-height: 1.4;
}
.persona-quote {
  font-size: 12px;
  color: var(--fg-muted);
  font-style: italic;
  line-height: 1.4;
}

/* Closing */
.closing {
  padding: 96px 48px;
  background: var(--fg);
  color: #fff;
  text-align: center;
}
.closing-headline {
  font-size: clamp(32px, 4vw, 52px);
  color: #fff;
  margin-bottom: 20px;
}
.closing-body {
  font-size: 18px;
  color: rgba(255,255,255,0.65);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Footer */
.footer {
  padding: 40px 48px;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-logo {
  font-family: 'Playfair Display', serif;
  font-size: 18px;
  font-weight: 700;
}
.footer-desc {
  font-size: 13px;
  color: var(--fg-muted);
  margin-top: 4px;
}
.footer-links {
  display: flex;
  gap: 24px;
}
.footer-link {
  font-size: 14px;
  color: var(--fg-muted);
  text-decoration: none;
}
.footer-link:hover { color: var(--fg); }

/* Responsive */
@media (max-width: 900px) {
  .problem-grid, .how-steps, .cases-grid, .val-grid { grid-template-columns: 1fr; }
  .personas-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-inner { flex-wrap: wrap; gap: 16px; }
  .stat-divider { display: none; }
  .footer-inner { flex-direction: column; gap: 24px; text-align: center; }
}
@media (max-width: 600px) {
  .nav, .hero, .problem, .how, .cases, .validation, .personas, .footer { padding-left: 24px; padding-right: 24px; }
  .stats-bar { padding: 24px; }
  .closing { padding: 64px 24px; }
  .hero-headline { font-size: 32px; }
  .personas-grid { grid-template-columns: repeat(2, 1fr); }
}