:root {
  --bg: #faf8f4;
  --fg: #1a2b2b;
  --accent: #0A5F5F;
  --accent-light: #0d7a7a;
  --surface: #ffffff;
  --muted: #6b7c7c;
  --border: #e2e8e8;
  --tag-bg: #e8f3f3;
  --tag-fg: #0A5F5F;
  --equation-bg: #f0f5f5;
  --font-display: 'Lora', Georgia, serif;
  --font-body: 'Source Sans 3', 'Helvetica Neue', sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 244, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--accent);
  letter-spacing: -0.5px;
}
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--fg); }

/* Hero */
.hero {
  background: var(--bg);
  padding: 80px 32px 72px;
}
.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 64px;
  align-items: center;
}
.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}
.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--fg);
  margin-bottom: 20px;
}
.hero-lede {
  font-size: 18px;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
}
.hero-founder {
  text-align: center;
}
.founder-portrait {
  width: 200px;
  height: 240px;
  object-fit: cover;
  border-radius: 4px;
  filter: grayscale(15%);
  border: 1px solid var(--border);
}
.founder-caption {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.founder-caption strong {
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--fg);
}
.founder-caption span {
  font-size: 13px;
  color: var(--muted);
}

/* Mission quote */
.mission {
  background: var(--accent);
  padding: 72px 32px;
}
.mission-inner { max-width: 860px; margin: 0 auto; }
.mission-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(22px, 3vw, 34px);
  color: rgba(255,255,255,0.95);
  line-height: 1.45;
  text-align: center;
}

/* Solutions */
.solutions {
  padding: 88px 32px;
  background: var(--surface);
}
.solutions-inner { max-width: 1100px; margin: 0 auto; }
.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 52px;
  line-height: 1.2;
}
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.solution-card {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 36px;
  background: var(--bg);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.solution-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(10, 95, 95, 0.08);
}
.solution-tag {
  display: inline-block;
  background: var(--tag-bg);
  color: var(--tag-fg);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 14px;
}
.solution-card h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 4px;
}
.solution-sub {
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 14px;
}
.solution-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 18px;
}
.solution-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.solution-features span {
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
  padding: 4px 10px;
  border-radius: 20px;
}

/* Research */
.research {
  padding: 88px 32px;
  background: var(--bg);
}
.research-inner { max-width: 1100px; margin: 0 auto; }
.research-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-top: 48px;
}
.paper-badge {
  display: inline-block;
  background: var(--accent);
  color: white;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 5px 12px;
  border-radius: 3px;
  margin-bottom: 16px;
}
.paper-title {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 14px;
}
.paper-desc {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.65;
  margin-bottom: 20px;
}
.paper-equation {
  font-family: 'Courier New', monospace;
  background: var(--equation-bg);
  color: var(--accent);
  font-size: 16px;
  padding: 14px 20px;
  border-radius: 4px;
  margin-bottom: 18px;
  letter-spacing: 0.03em;
}
.paper-link {
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
}
.paper-link:hover { color: var(--accent-light); }

.insight-item {
  border-left: 3px solid var(--accent);
  padding-left: 18px;
  margin-bottom: 28px;
}
.insight-domain {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}
.insight-item strong {
  font-size: 15px;
  color: var(--fg);
  display: block;
  margin-bottom: 6px;
}
.insight-item p {
  font-size: 14px;
  color: var(--muted);
}

/* Closing / Principles */
.closing {
  padding: 88px 32px;
  background: var(--surface);
}
.closing-inner { max-width: 1100px; margin: 0 auto; }
.closing-headline {
  font-family: var(--font-display);
  font-size: clamp(26px, 3vw, 40px);
  font-weight: 700;
  color: var(--fg);
  margin-bottom: 48px;
}
.principles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}
.principle h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.principle p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.65;
}

/* Footer */
.footer {
  background: var(--fg);
  color: rgba(255,255,255,0.6);
  padding: 56px 32px 40px;
}
.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 48px;
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: white;
  display: block;
  margin-bottom: 10px;
}
.footer-brand p {
  font-size: 14px;
  max-width: 320px;
  line-height: 1.6;
}
.footer-meta { text-align: right; }
.footer-meta p { font-size: 13px; margin-bottom: 4px; }
.footer-copy { margin-top: 20px; font-size: 12px; }

/* Responsive */
@media (max-width: 768px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-founder { display: none; }
  .solutions-grid { grid-template-columns: 1fr; }
  .research-block { grid-template-columns: 1fr; }
  .principles-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-inner { flex-direction: column; }
  .footer-meta { text-align: left; }
  .nav-links { display: none; }
}