/* ============================================================
   GTAC — shared design system
   Loaded by index.html and every services/*.html page.
   Page-specific styles live in a <style> block on each page.
   ============================================================ */

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

:root {
  --black:     #1B1B1B;
  --navy:      #0A1E3F;
  --navy-deep: #061429;
  --blue:      #005EA2;   /* USWDS primary */
  --blue-dark: #00477E;
  --blue-vivid:#2491FF;   /* CIA cobalt accent */
  --gold:      #C9A84C;
  --body-text: #1B1B1B;
  --muted:     #565C65;
  --light-bg:  #F0F0F0;
  --gray-warm: #F9F9F7;
  --border:    #DFE1E2;
  --white:     #FFFFFF;
}

html { scroll-behavior: smooth; }

body {
  background: var(--white);
  color: var(--body-text);
  font-family: 'Public Sans', system-ui, -apple-system, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.nav-accent { height: 4px; background: linear-gradient(90deg, var(--navy) 0%, var(--blue) 50%, var(--gold) 100%); }
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 16px; height: 80px;
}
.nav-brand {
  display: flex; align-items: center; gap: 14px;
  text-decoration: none;
}
.nav-brand img { height: 52px; width: 52px; object-fit: contain; }
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.nav-brand-text span:first-child {
  font-size: 22px; font-weight: 900;
  color: var(--navy); letter-spacing: 1px;
}
.nav-brand-text span:last-child {
  font-size: 10.5px; letter-spacing: 1.6px;
  color: var(--blue); font-weight: 700; text-transform: uppercase;
}
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; }
.nav-links a {
  text-decoration: none;
  font-size: 14px; font-weight: 700; letter-spacing: 0.4px;
  color: var(--black); text-transform: uppercase;
  transition: color 0.2s; padding: 6px 0;
  border-bottom: 3px solid transparent;
}
.nav-links a:hover { color: var(--blue); border-bottom-color: var(--blue); }
.nav-cta {
  background: var(--blue); color: var(--white) !important;
  padding: 11px 24px; border-bottom: none !important;
  font-size: 13px !important; letter-spacing: 0.6px !important;
  transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--blue-dark) !important; }

/* ── BUTTONS ── */
.btn {
  display: inline-block;
  padding: 14px 30px;
  font-family: inherit;
  font-size: 14px; letter-spacing: 0.6px;
  font-weight: 800; text-transform: uppercase;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer; border: 2px solid transparent;
}
.btn-primary {
  background: var(--blue-vivid); color: var(--navy-deep);
  border-color: var(--blue-vivid);
}
.btn-primary:hover { background: #4aa6ff; border-color: #4aa6ff; }
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.55); color: var(--white);
}
.btn-outline:hover { background: var(--white); color: var(--navy); border-color: var(--white); }
/* On-light variants */
.btn-primary-solid { background: var(--blue); color: var(--white); border-color: var(--blue); }
.btn-primary-solid:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn-outline-dark {
  background: transparent; border-color: var(--navy); color: var(--navy);
}
.btn-outline-dark:hover { background: var(--navy); color: var(--white); border-color: var(--navy); }

/* ── SECTIONS ── */
section { padding: 92px 16px; }
section.alt-bg { background: var(--gray-warm); }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-eyebrow {
  font-size: 11px; letter-spacing: 3px; font-weight: 800;
  color: var(--blue); text-transform: uppercase;
  margin-bottom: 14px;
  display: flex; align-items: center; gap: 10px;
}
.section-eyebrow::before {
  content: ''; display: block;
  width: 28px; height: 3px; background: var(--gold);
}
.section-title {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 900; color: var(--navy);
  margin-bottom: 16px; line-height: 1.12;
  letter-spacing: -0.3px;
}
.section-desc {
  font-size: 17px; color: var(--muted);
  max-width: 600px; line-height: 1.7;
}

/* ── FOOTER ── */
footer {
  background: var(--navy-deep);
  padding: 0;
}
.footer-accent { height: 4px; background: linear-gradient(90deg, var(--gold) 0%, var(--blue) 50%, var(--navy) 100%); }
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 44px 16px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 24px;
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-brand img { height: 44px; width: 44px; object-fit: contain; }
.footer-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.footer-brand-text strong { color: var(--white); font-size: 15px; letter-spacing: 0.5px; font-weight: 800; }
.footer-brand-text span {
  font-size: 11px; letter-spacing: 1.2px;
  color: rgba(255,255,255,0.55); font-weight: 600;
  text-transform: uppercase;
}
.footer-links { display: flex; gap: 28px; }
.footer-links a {
  font-size: 12px; letter-spacing: 0.6px;
  color: rgba(255,255,255,0.7); text-decoration: none;
  text-transform: uppercase; font-weight: 600; transition: color 0.2s;
}
.footer-links a:hover { color: var(--white); }
.footer-bar {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 18px 16px;
}
.footer-bar-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.footer-copy { font-size: 12px; color: rgba(255,255,255,0.45); }

/* ── RESPONSIVE (shared) ── */
@media (max-width: 900px) {
  .nav-links { display: none; }
}
@media (max-width: 640px) {
  .footer-inner { flex-direction: column; text-align: center; align-items: flex-start; }
}