:root {
  --navy: #1a3a5c;
  --navy-deep: #12283f;
  --navy-soft: #2d5f8f;
  --ground: #fbf9f6;
  --surface: #ffffff;
  --surface-alt: #f4f0ea;
  --ink: #1c2733;
  --ink-muted: #5a6672;
  --rule: #ddd6cb;
  --rule-soft: #e9e3da;

  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;

  --contact-bg: #1a3a5c;
  --contact-ink: #fbf9f6;
  --contact-ink-dim: #b7c8da;

  --measure: 1120px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --navy: #8fb6dc;
    --navy-deep: #b9d3ee;
    --navy-soft: #6f9dc9;
    --ground: #10171f;
    --surface: #10171f;
    --surface-alt: #16202b;
    --ink: #e6eaee;
    --ink-muted: #97a3b0;
    --rule: #2a3846;
    --rule-soft: #222e3a;
    --contact-bg: #16283c;
    --contact-ink: #eef3f8;
    --contact-ink-dim: #9db2c8;
  }
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
}

a { color: var(--navy); }

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.wrap-narrow { max-width: 720px; }

.skip {
  position: absolute;
  left: -9999px;
  background: var(--navy);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

:focus-visible {
  outline: 2px solid var(--navy-soft);
  outline-offset: 3px;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--navy);
  text-decoration: none;
}

.brand-mark { width: 34px; height: 34px; overflow: visible; }
.brand-lc {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 4px;
  fill: currentColor;
}
.brand-mark line { stroke: currentColor; stroke-width: 1.6; }

.brand-text {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.brand-thin { font-weight: 400; }

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2.5vw, 2rem);
  font-size: 0.9375rem;
}
.site-nav a {
  color: var(--ink-muted);
  text-decoration: none;
  padding-block: 0.25rem;
  border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--navy); border-bottom-color: var(--navy); }
.nav-cta { color: var(--navy) !important; font-weight: 600; }

@media (max-width: 640px) {
  .brand-text { display: none; }
  .site-nav { font-size: 0.875rem; }
}

/* ---------- hero ---------- */

.hero {
  padding-block: clamp(4rem, 12vw, 8.5rem) clamp(3rem, 8vw, 6rem);
  border-bottom: 1px solid var(--rule-soft);
}

.eyebrow {
  margin: 0 0 1.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.eyebrow::after {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin-top: 1rem;
  background: var(--navy);
}

.hero h1 {
  font-size: clamp(2.1rem, 5.6vw, 3.6rem);
  max-width: 17ch;
  margin-bottom: 1.5rem;
  color: var(--navy-deep);
}

.lede {
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  color: var(--ink-muted);
  max-width: 60ch;
  margin: 0 0 2.5rem;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; }

.btn {
  display: inline-block;
  background: var(--navy);
  color: var(--ground);
  border: 1px solid var(--navy);
  border-radius: 2px;
  padding: 0.8rem 1.6rem;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}
.btn:hover { background: var(--navy-deep); border-color: var(--navy-deep); }

.btn-ghost {
  background: transparent;
  color: var(--navy);
}
.btn-ghost:hover { background: var(--navy); color: var(--ground); }

/* ---------- sections ---------- */

.section { padding-block: clamp(3.5rem, 9vw, 6.5rem); }
.section-alt {
  background: var(--surface-alt);
  border-block: 1px solid var(--rule-soft);
}

.section-title {
  font-size: 0.8125rem;
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--navy);
  padding-bottom: 1rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--rule);
}

.section-intro {
  margin: -1.5rem 0 2.5rem;
  color: var(--ink-muted);
  max-width: 62ch;
}

/* ---------- about ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items: start;
}

.prose p {
  margin: 0 0 1.35em;
  max-width: 66ch;
}
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--navy-deep); }

.stats {
  display: grid;
  gap: 1.75rem;
  padding-left: clamp(1.25rem, 3vw, 2rem);
  border-left: 2px solid var(--navy);
}

.stat-num {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--navy-deep);
}
.stat-unit {
  display: block;
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--navy);
  margin-top: 0.5rem;
}
.stat-label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--ink-muted);
}

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; }
  .stats {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1.5rem;
    padding-left: 0;
    padding-top: 1.75rem;
    border-left: 0;
    border-top: 2px solid var(--navy);
  }
}

/* ---------- services ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.card {
  background: var(--surface);
  padding: clamp(1.5rem, 3vw, 2.15rem);
}

.card h3 {
  font-size: 1.1875rem;
  color: var(--navy-deep);
  margin-bottom: 0.7rem;
}
.card h3::after {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  margin-top: 0.85rem;
  background: var(--navy);
  opacity: 0.5;
}
.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-muted);
}

/* ---------- technical ---------- */

.tech { margin: 0; }

.tech-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: 1.1rem;
  border-bottom: 1px solid var(--rule-soft);
}
.tech-row:first-child { border-top: 1px solid var(--rule-soft); }

.tech dt {
  font-family: var(--serif);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--navy-deep);
}

.tech dd {
  margin: 0;
  color: var(--ink-muted);
}

@media (max-width: 700px) {
  .tech-row { grid-template-columns: 1fr; gap: 0.85rem; }
}

/* ---------- contact ---------- */

.contact {
  background: var(--contact-bg);
  color: var(--contact-ink);
  border-block: 1px solid var(--contact-bg);
  padding-block: clamp(5rem, 14vw, 9rem);
}

.contact-inner { text-align: center; }

.contact-title {
  color: var(--contact-ink-dim);
  border-bottom-color: color-mix(in srgb, var(--contact-ink) 25%, transparent);
  text-align: left;
}

.contact-head {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 auto 1.25rem;
  font-size: clamp(2.1rem, 6vw, 3.9rem);
  color: var(--contact-ink);
  max-width: 16ch;
}

.contact-lede {
  margin: 0 auto 3rem;
  font-size: clamp(1.0625rem, 1.7vw, 1.25rem);
  color: var(--contact-ink-dim);
  max-width: 44ch;
}

.contact-email {
  display: inline-block;
  font-family: var(--serif);
  font-size: clamp(1.25rem, 3.4vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--contact-ink);
  text-decoration: none;
  padding-bottom: 0.35rem;
  border-bottom: 2px solid color-mix(in srgb, var(--contact-ink) 40%, transparent);
  overflow-wrap: anywhere;
  transition: border-color 0.18s ease;
}
.contact-email:hover { border-bottom-color: var(--contact-ink); }
.contact-email:focus-visible { outline-color: var(--contact-ink); }

/* ---------- footer ---------- */

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--rule-soft);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
}

.footer-brand {
  margin: 0;
  font-family: var(--serif);
  color: var(--navy-deep);
}

.footer-links { display: flex; flex-wrap: wrap; gap: 1.5rem; }
.footer-links a { color: var(--ink-muted); text-decoration: none; }
.footer-links a:hover { color: var(--navy); text-decoration: underline; }

.prose s {
  color: var(--ink-muted);
  opacity: 0.65;
  text-decoration-thickness: 1px;
}