/* css/nav.css — header/nav/footer, responsive, glass + pill nav */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(248, 250, 252, 0.82);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid rgba(203, 213, 225, 0.6);
}
.site-header .container {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: var(--space-4);
}
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-heading); font-weight: 700; font-size: 1.2rem;
  color: var(--color-fg); text-decoration: none;
}
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #FFFFFF; font-family: var(--font-heading); font-weight: 700; font-size: 0.85rem;
}
.brand span { color: var(--color-accent); }

.site-nav { display: flex; }
.site-nav ul {
  list-style: none; display: flex; gap: var(--space-2);
  margin: 0; padding: 0;
}
.site-nav a {
  display: inline-block;
  white-space: nowrap;
  color: var(--color-fg); text-decoration: none; font-weight: 600; font-size: 0.86rem;
  padding: 7px 11px; border-radius: 999px;
}
.site-nav a:hover {
  background: rgba(30, 58, 138, 0.07);
  color: var(--color-primary);
}
.site-nav a[aria-current="page"] {
  background: rgba(30, 58, 138, 0.10);
  color: var(--color-primary);
}

.nav-actions { display: flex; align-items: center; gap: var(--space-3); }
.nav-cta { padding: 10px 20px; font-size: 0.88rem; white-space: nowrap; }

.nav-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 44px; height: 44px; padding: 10px;
}
.nav-toggle span {
  display: block; width: 100%; height: 2px; background: var(--color-fg);
  border-radius: 2px; margin: 6px 0; transform-origin: center;
  transition: transform 250ms ease, opacity 200ms ease;
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (min-width: 768px) and (max-width: 1279px) {
  .nav-cta { display: none; }
}

@media (max-width: 1279px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    background: rgba(248, 250, 252, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
    max-height: 0; overflow: hidden; opacity: 0;
    transition: max-height 300ms ease, opacity 200ms ease;
  }
  .site-nav.is-open { max-height: 480px; opacity: 1; }
  .site-nav ul { flex-direction: column; gap: 4px; padding: var(--space-3) var(--space-5) var(--space-5); }
  .site-nav a { display: block; white-space: normal; border-radius: var(--radius-sm); padding: 12px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .nav-toggle span { transition: none; }
  .site-nav { transition: none; }
}

.site-footer {
  background: var(--color-fg); color: #CBD5E1;
  padding: var(--space-7) 0 var(--space-5);
  margin-top: var(--space-8);
}
.site-footer a { color: #FFFFFF; text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-grid {
  display: grid; gap: var(--space-5);
  grid-template-columns: 1fr;
}
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer-grid h4 { color: #FFFFFF; font-size: 1rem; margin-bottom: var(--space-3); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: var(--space-2); }
.footer-bottom {
  margin-top: var(--space-6); padding-top: var(--space-4);
  border-top: 1px solid #334155; font-size: 0.875rem; color: var(--color-muted-fg);
}