/* ============================================================
   Navigation & Header
   ============================================================ */

.site-header {
  position: fixed;
  top: var(--banner-height);
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-5) 0;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), padding var(--transition);
}

.site-header.scrolled {
  background: oklch(from var(--color-bg) l c h / 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--color-border);
  padding: var(--space-3) 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.nav-logo-mark {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 2rem;
  line-height: 1;
  color: var(--color-primary);
  font-weight: 400;
  transition: color var(--transition);
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-logo-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: 0.01em;
  line-height: 1.1;
  transition: color var(--transition);
}

.nav-logo-tagline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  line-height: 1;
}

.nav-logo:hover .nav-logo-mark,
.nav-logo:hover .nav-logo-name {
  color: var(--color-primary-hover);
}

/* Desktop Nav */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-menu a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: color var(--transition), background var(--transition);
}

.nav-menu a:hover {
  color: var(--color-primary);
  background: var(--color-primary-faint);
}

.nav-menu a.active {
  color: var(--color-primary);
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-cta {
  background: var(--color-primary);
  color: var(--color-text-inverse) !important;
  padding: var(--space-2) var(--space-5) !important;
  border-radius: var(--radius-full) !important;
  font-weight: 500 !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  font-size: calc(var(--text-xs) * 1.05) !important;
}

.nav-cta:hover {
  background: var(--color-primary-hover) !important;
  color: var(--color-text-inverse) !important;
}

.theme-toggle {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}

.theme-toggle:hover {
  color: var(--color-primary);
  background: var(--color-primary-faint);
}

/* Mobile Toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  color: var(--color-text);
}

.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: currentColor;
  transition: all var(--transition);
  border-radius: 1px;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  background: var(--color-surface-teal);
  border-top: 1px solid var(--color-primary-light);
  padding-block: var(--space-16) var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  font-weight: 400;
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  max-width: 32ch;
  line-height: 1.6;
}

.footer-col-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-legal {
  display: flex;
  gap: var(--space-6);
}

.footer-legal a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-legal a:hover {
  color: var(--color-text-muted);
}

/* ── Responsive ─────────────────────────────────────────────*/
@media (max-width: 900px) {
  .nav-menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    background: var(--color-bg);
    padding: 6rem var(--space-8) var(--space-8);
    transform: translateX(100%);
    transition: transform 400ms var(--ease-out);
    z-index: 90;
    gap: var(--space-2);
    align-items: flex-start;
    overflow-y: auto;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-menu a {
    font-size: var(--text-lg);
    font-family: var(--font-display);
    padding: var(--space-3) 0;
  }

  .nav-toggle {
    display: flex;
    z-index: 101;
  }

  /* Ensure logo and CTA never overlap */
  .nav-inner {
    gap: var(--space-3);
  }

  .nav-logo-tagline {
    display: none;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}