/* ===========================================================
   Systems Before Spaces / Intelligent by Design — stylesheet
   =========================================================== */

:root {
  --navy: #0d2436;
  --navy-deep: #081722;
  --teal: #1c8c82;
  --teal-light: #2fb3a6;
  --sand: #f6f3ec;
  --sand-dark: #ece6d8;
  --ink: #1c2530;
  --ink-soft: #4b5763;
  --line: #dcd6c8;
  --white: #ffffff;
  --radius: 4px;
  --maxw: 1120px;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--sand);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

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

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--navy-deep);
}

p { margin: 0 0 1em; }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 0.9em;
  display: block;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 243, 236, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--navy-deep);
  letter-spacing: 0.01em;
}

.brand small {
  display: block;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--teal);
  margin-top: 2px;
}

nav.main-nav {
  display: flex;
  gap: 2.2rem;
  align-items: center;
}

nav.main-nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--navy-deep);
}

nav.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 2px;
  background: var(--teal);
}

nav.main-nav a.btn { padding: 10px 18px; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy-deep);
  margin: 5px 0;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--navy-deep);
  color: var(--white);
}
.btn-primary:hover { background: var(--teal); }

.btn-outline {
  border-color: var(--navy-deep);
  color: var(--navy-deep);
  background: transparent;
}
.btn-outline:hover {
  background: var(--navy-deep);
  color: var(--white);
}

.btn-ghost {
  color: var(--navy-deep);
  border-color: var(--line);
}

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

.hero {
  padding: 96px 0 84px;
  background:
    radial-gradient(circle at 82% 18%, rgba(28,140,130,0.14), transparent 55%),
    var(--sand);
  border-bottom: 1px solid var(--line);
}

.hero .wrap {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.4rem, 4.2vw, 3.6rem);
  margin-bottom: 0.35em;
}

.hero .lede {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 1.8em;
}

.hero .cta-row { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-panel {
  background: var(--navy-deep);
  border-radius: 6px;
  padding: 34px;
  color: var(--sand);
}
.hero-panel .stat {
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.hero-panel .stat:last-child { border-bottom: none; }
.hero-panel .stat .num {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--teal-light);
  display: block;
}
.hero-panel .stat .lbl {
  font-size: 0.82rem;
  color: rgba(246,243,236,0.75);
}
.hero-panel .foot-note {
  font-size: 0.72rem;
  color: rgba(246,243,236,0.55);
  margin-top: 18px;
  margin-bottom: 0;
  line-height: 1.5;
}

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

section { padding: 84px 0; }
section.tight { padding: 60px 0; }
section.alt { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
section.navy { background: var(--navy-deep); color: var(--sand); }
section.navy h2, section.navy h3 { color: var(--white); }
section.navy .eyebrow { color: var(--teal-light); }

.section-head {
  max-width: 640px;
  margin: 0 0 48px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.grid {
  display: grid;
  gap: 28px;
}
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 30px;
}
section.navy .card {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.14);
}

.block-card .index {
  font-family: var(--serif);
  font-size: 0.85rem;
  color: var(--teal);
  border: 1px solid var(--teal);
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.block-card h3 { font-size: 1.05rem; margin-bottom: 0.4em; }
.block-card p { font-size: 0.92rem; color: var(--ink-soft); margin-bottom: 0; }

.layer-row {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.layer-row:last-child { border-bottom: none; }
.layer-row .tag {
  flex: 0 0 190px;
  font-weight: 600;
  color: var(--navy-deep);
  font-size: 0.92rem;
}
.layer-row p { margin: 0; color: var(--ink-soft); font-size: 0.92rem; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}

.pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border: 1px solid var(--teal);
  color: var(--teal);
  border-radius: 999px;
  margin-bottom: 14px;
}

ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li {
  padding-left: 26px;
  position: relative;
  margin-bottom: 12px;
  color: var(--ink-soft);
}
ul.plain li::before {
  content: "";
  position: absolute;
  left: 0; top: 10px;
  width: 8px; height: 8px;
  background: var(--teal);
  border-radius: 50%;
}

.quote-block {
  border-left: 3px solid var(--teal);
  padding-left: 24px;
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--navy-deep);
  margin: 0;
}

table.compat {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table.compat th, table.compat td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
table.compat th { color: var(--ink-soft); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; }

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

footer.site-footer {
  background: var(--navy-deep);
  color: rgba(246,243,236,0.7);
  padding: 56px 0 28px;
}
footer .wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}
footer h4 {
  color: var(--white);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--sans);
  margin-bottom: 1em;
}
footer .brand { color: var(--white); margin-bottom: 12px; }
footer p { font-size: 0.88rem; color: rgba(246,243,236,0.6); }
footer ul { list-style: none; padding: 0; margin: 0; }
footer li { margin-bottom: 10px; font-size: 0.9rem; }
footer a:hover { color: var(--teal-light); }
.footer-bottom {
  margin-top: 44px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.78rem;
  color: rgba(246,243,236,0.45);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

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

.contact-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 40px;
}
.contact-row {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.contact-row:last-child { border-bottom: none; }
.contact-row .lbl {
  flex: 0 0 140px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  padding-top: 3px;
}
.contact-row .val { font-weight: 500; color: var(--navy-deep); }

/* ---------- page hero (inner pages) ---------- */

.page-hero {
  padding: 64px 0 48px;
  border-bottom: 1px solid var(--line);
  background: var(--sand);
}
.page-hero .lede {
  max-width: 62ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .two-col { grid-template-columns: 1fr; }
  .hero .wrap { grid-template-columns: 1fr; }
  footer .wrap { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  nav.main-nav { position: fixed; top: 76px; left: 0; right: 0; background: var(--sand); flex-direction: column; align-items: flex-start; padding: 20px 32px; gap: 1rem; border-bottom: 1px solid var(--line); display: none; }
  nav.main-nav.open { display: flex; }
  .menu-toggle { display: block; }
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
  .layer-row { flex-direction: column; gap: 6px; }
  .layer-row .tag { flex-basis: auto; }
  .contact-row { flex-direction: column; gap: 4px; }
}