/* ============================================================
   TERYX — Shared Site Layout
   Navigation, footer, dark mode toggle, responsive mobile menu
   ============================================================ */

/* === Site Navigation === */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--tx-border, #e5e7eb);
  height: 56px;
}

.site-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  height: 56px;
  gap: 1.5rem;
}

.site-nav-brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--tx-text, #111827);
  text-decoration: none;
  margin-right: auto;
  letter-spacing: -0.02em;
}
.site-nav-brand:hover {
  color: var(--tx-primary, #3b82f6);
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav-link {
  font-size: 0.875rem;
  color: var(--tx-text-secondary, #6b7280);
  text-decoration: none;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: var(--tx-radius, 0.375rem);
  transition: color 150ms, background 150ms;
}
.site-nav-link:hover {
  color: var(--tx-text, #111827);
  background: var(--tx-bg-tertiary, #f3f4f6);
}
.site-nav-link.active {
  color: var(--tx-primary, #3b82f6);
  background: var(--tx-primary-light, #dbeafe);
}

.site-nav-gh {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4375rem 1rem;
  background: var(--tx-text, #111827);
  color: var(--tx-text-inverse, #fff) !important;
  border-radius: var(--tx-radius-lg, 0.5rem);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 150ms;
}
.site-nav-gh:hover {
  opacity: 0.85;
}
.site-nav-gh svg {
  flex-shrink: 0;
}

/* Dark mode toggle */
.site-nav-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--tx-border, #e5e7eb);
  border-radius: var(--tx-radius, 0.375rem);
  background: var(--tx-bg, #fff);
  color: var(--tx-text-secondary, #6b7280);
  cursor: pointer;
  transition: color 150ms, background 150ms, border-color 150ms;
}
.site-nav-theme-toggle:hover {
  color: var(--tx-text, #111827);
  background: var(--tx-bg-tertiary, #f3f4f6);
  border-color: var(--tx-border-strong, #d1d5db);
}
.site-nav-theme-toggle svg {
  width: 18px;
  height: 18px;
}
.site-nav-theme-toggle .icon-sun { display: none; }
.site-nav-theme-toggle .icon-moon { display: block; }

[data-theme='dark'] .site-nav-theme-toggle .icon-sun { display: block; }
[data-theme='dark'] .site-nav-theme-toggle .icon-moon { display: none; }

/* Mobile hamburger */
.site-nav-mobile-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--tx-border, #e5e7eb);
  border-radius: var(--tx-radius, 0.375rem);
  background: var(--tx-bg, #fff);
  color: var(--tx-text-secondary, #6b7280);
  cursor: pointer;
  transition: color 150ms, background 150ms;
}
.site-nav-mobile-btn:hover {
  color: var(--tx-text, #111827);
  background: var(--tx-bg-tertiary, #f3f4f6);
}
.site-nav-mobile-btn svg {
  width: 20px;
  height: 20px;
}
.site-nav-mobile-btn .icon-close { display: none; }
.site-nav-mobile-btn .icon-menu { display: block; }
.site-nav-mobile-btn.open .icon-close { display: block; }
.site-nav-mobile-btn.open .icon-menu { display: none; }

/* Mobile dropdown menu */
.site-nav-mobile-menu {
  display: none;
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--tx-bg, #fff);
  border-bottom: 1px solid var(--tx-border, #e5e7eb);
  box-shadow: var(--tx-shadow-lg, 0 10px 15px rgba(0,0,0,0.1));
  z-index: 999;
  padding: 0.5rem 0;
}
.site-nav-mobile-menu.open {
  display: block;
}
.site-nav-mobile-menu a {
  display: block;
  padding: 0.75rem 2rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--tx-text-secondary, #6b7280);
  text-decoration: none;
  transition: color 150ms, background 150ms;
}
.site-nav-mobile-menu a:hover {
  background: var(--tx-bg-tertiary, #f3f4f6);
  color: var(--tx-text, #111827);
}
.site-nav-mobile-menu a.active {
  color: var(--tx-primary, #3b82f6);
  background: var(--tx-primary-light, #dbeafe);
}

/* === Site Footer === */
.site-footer {
  border-top: 1px solid var(--tx-border, #e5e7eb);
  background: var(--tx-bg-secondary, #f9fafb);
  padding: 3rem 2rem 2rem;
  margin-top: 3rem;
}

.site-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
}

.site-footer-brand h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--tx-text, #111827);
}
.site-footer-brand p {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  color: var(--tx-text-secondary, #6b7280);
  line-height: 1.5;
}

.site-footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  background: var(--tx-bg-tertiary, #f3f4f6);
  border: 1px solid var(--tx-border, #e5e7eb);
  border-radius: var(--tx-radius-full, 9999px);
  font-size: 0.75rem;
  color: var(--tx-text-secondary, #6b7280);
  font-weight: 500;
}

.site-footer-col h4 {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--tx-text-muted, #9ca3af);
}

.site-footer-col a {
  display: block;
  padding: 0.25rem 0;
  font-size: 0.875rem;
  color: var(--tx-text-secondary, #6b7280);
  text-decoration: none;
  transition: color 150ms;
}
.site-footer-col a:hover {
  color: var(--tx-text, #111827);
}

.site-footer-bottom {
  max-width: 1200px;
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--tx-border, #e5e7eb);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--tx-text-muted, #9ca3af);
}

.site-footer-social {
  display: flex;
  gap: 1rem;
}
.site-footer-social a {
  color: var(--tx-text-muted, #9ca3af);
  transition: color 150ms;
}
.site-footer-social a:hover {
  color: var(--tx-text, #111827);
}

/* === Dark mode overrides for site chrome === */
[data-theme='dark'] .site-nav {
  background: rgba(15, 23, 42, 0.95);
}

[data-theme='dark'] .site-nav-gh {
  background: var(--tx-bg-tertiary, #334155);
}

/* === Body offset for fixed nav === */
body.has-site-nav {
  padding-top: 56px;
}

/* === Responsive === */
@media (max-width: 768px) {
  .site-nav-links {
    display: none;
  }
  .site-nav-gh {
    display: none;
  }
  .site-nav-mobile-btn {
    display: inline-flex;
  }

  .site-footer-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .site-footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }
}