:root {
  --navy: #0B2340;
  --navy-700: #173358;
  --gold: #B8860B;
  --gold-hv: #9E7409;
  --slate: #4A5568;
  --ink: #1A202C;
  --paper: #F8FAFC;
  --line: #E5E7EB;
  --max: 1120px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--ink);
  line-height: 1.6;
  background: #fff;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Source Serif Pro', Georgia, 'Times New Roman', serif;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: -0.01em;
  line-height: 1.25;
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.3; }
h3 { font-size: 1.125rem; }

p { color: var(--slate); line-height: 1.7; }

a { color: inherit; text-decoration: none; }

img, svg { max-width: 100%; height: auto; display: block; }

.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }

.credbar {
  background: var(--navy);
  color: #fff;
  padding: 10px 24px;
  font-size: 12px;
  letter-spacing: 0.03em;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.credbar span { opacity: 0.8; }
.credbar a { opacity: 0.8; transition: opacity 150ms ease; }
.credbar a:hover { opacity: 1; color: var(--gold); }

.header {
  background: #fff;
  padding: 18px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  gap: 1rem;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'Source Serif Pro', serif;
  font-size: 15px;
  color: var(--navy);
  font-weight: 500;
}
.logo-mark {
  height: 40px;
  width: auto;
  display: block;
}
.logo picture { display: flex; align-items: center; }
.nav {
  display: flex;
  gap: 28px;
  font-size: 14px;
  color: var(--slate);
}
.nav a { transition: color 150ms ease; }
.nav a:hover, .nav a.active { color: var(--navy); }

.hero {
  background: var(--navy);
  color: #fff;
  padding: 5rem 1.5rem 4rem;
}
.hero .wrap { max-width: 680px; margin: 0 auto; padding: 0; }
.hero .container-wrap { max-width: var(--max); margin: 0 auto; }
.hero h1 {
  color: #fff;
  margin-bottom: 1.25rem;
  max-width: 620px;
}
.hero p {
  color: rgba(255,255,255,0.85);
  font-size: 1.0625rem;
  max-width: 580px;
  margin-bottom: 2rem;
}
.hero-sm {
  padding: 3rem 1.5rem 2.5rem;
}
.hero-sm h1 { font-size: clamp(1.75rem, 3.5vw, 2.25rem); }

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 150ms ease;
  border: 1px solid transparent;
  font-family: inherit;
}
.btn-primary { background: var(--gold); color: var(--navy); }
.btn-primary:hover { background: var(--gold-hv); color: var(--navy); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}
.btn-ghost:hover { border-color: #fff; }
.btn-secondary {
  background: var(--navy);
  color: #fff;
}
.btn-secondary:hover { background: var(--navy-700); }

.section { padding: 4rem 1.5rem; }
.section-paper { background: var(--paper); }
.section-white { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { text-align: center; margin-bottom: 2.5rem; }

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.service {
  background: var(--paper);
  border-top: 2px solid var(--navy);
  padding: 1.75rem 1.5rem;
}
.service h3 { margin-bottom: 0.75rem; }
.service p { font-size: 0.9375rem; margin-bottom: 1rem; }
.service .more {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--navy);
  font-weight: 500;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 1px;
}

.patent-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}
.patent-grid h2 { margin-bottom: 1rem; }
.patent-grid p { margin-bottom: 1rem; font-size: 0.9375rem; }
.patent-cite {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: 0.03em;
}
.patent-diagram {
  background: #fff;
  border: 1px solid var(--line);
  padding: 1.5rem;
}

.cred-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  max-width: 900px;
  margin: 0 auto;
}
.cred {
  text-align: center;
  padding: 1.25rem 0.75rem;
  background: var(--paper);
  border: 1px solid var(--line);
}
.cred-title {
  font-family: 'Source Serif Pro', serif;
  font-weight: 500;
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 0.375rem;
}
.cred-sub {
  font-size: 0.75rem;
  color: var(--slate);
  line-height: 1.4;
}

.prose { max-width: 720px; margin: 0 auto; }
.prose h2 { margin: 2rem 0 0.75rem; }
.prose h3 { margin: 1.5rem 0 0.5rem; color: var(--navy); font-family: 'Source Serif Pro', serif; font-size: 1.0625rem; }
.prose p { margin-bottom: 1rem; }
.prose ul { margin: 0 0 1rem 1.25rem; }
.prose ul li { color: var(--slate); line-height: 1.7; margin-bottom: 0.25rem; }
.prose strong { color: var(--ink); font-weight: 500; }
.prose .lead { font-size: 1.0625rem; color: var(--slate); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }

.contact-block {
  background: var(--paper);
  border-left: 3px solid var(--gold);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}
.contact-block a {
  color: var(--navy);
  font-weight: 500;
  border-bottom: 1px solid var(--gold);
}

.footer {
  background: var(--navy);
  color: rgba(255,255,255,0.85);
  padding: 3rem 1.5rem 1.5rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto 2rem;
}
.footer h4 {
  color: #fff;
  font-family: 'Source Serif Pro', serif;
  font-size: 0.9375rem;
  margin-bottom: 0.75rem;
  font-weight: 500;
}
.footer p, .footer a {
  color: rgba(255,255,255,0.75);
  font-size: 0.875rem;
  line-height: 1.9;
  transition: color 150ms ease;
}
.footer a:hover { color: var(--gold); }
.footer .addr { line-height: 1.7; }
.footer-legal {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.75rem;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .credbar { font-size: 11px; padding: 8px 16px; flex-direction: column; text-align: center; gap: 4px; }
  .header { padding: 14px 16px; flex-direction: column; gap: 12px; }
  .nav { flex-wrap: wrap; justify-content: center; gap: 16px; }
  .hero { padding: 3rem 1.25rem; }
  .hero-sm { padding: 2.5rem 1.25rem 2rem; }
  .section { padding: 2.5rem 1.25rem; }
  .patent-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-legal { flex-direction: column; }
}

@media print {
  .credbar, .header, .footer, .buttons { display: none; }
  body { color: #000; }
  .hero { background: #fff; color: #000; padding: 2rem 0; }
  .hero h1, .hero p { color: #000; }
  a { color: #000; text-decoration: none; }
  .section { padding: 1rem 0; }
}