/* ==========================================================================
   Resilience Group — Layout
   Version 1.0

   Header, footer, nav, page grid, section spacing, responsive.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Site Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  gap: var(--space-6);
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.site-logo img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: var(--tracking-tight);
  line-height: 1.1;
}

.logo-strapline {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: var(--tracking-wide);
}

/* Desktop Nav */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-link {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: all var(--transition-interactive);
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-surface-offset);
  text-decoration: none;
}

/* Nav CTA (Contact button in header) */
.nav-cta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  text-decoration: none;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  margin-left: var(--space-2);
  transition: background var(--transition-interactive);
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
  text-decoration: none;
}

/* Theme toggle in header */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition-interactive);
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--color-text);
}

/* Mobile nav overlay */
.mobile-nav {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--color-bg);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  overflow-y: auto;
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--color-text);
}

.mobile-nav-link {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  transition: color var(--transition-interactive);
}

.mobile-nav-link:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.mobile-nav-cta {
  display: block;
  text-align: center;
  margin-top: var(--space-6);
}

/* --------------------------------------------------------------------------
   Responsive: Mobile Header
   -------------------------------------------------------------------------- */

@media (max-width: 1023px) {
  .site-nav {
    display: none;
  }

  .nav-cta-desktop {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }
}

@media (min-width: 1024px) {
  .mobile-nav {
    display: none !important;
  }
}

/* --------------------------------------------------------------------------
   Page Layout
   -------------------------------------------------------------------------- */

.page-main {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Content-width sections */
.section-narrow {
  max-width: var(--content-narrow);
  margin-left: auto;
  margin-right: auto;
}

.section-default {
  max-width: var(--content-default);
  margin-left: auto;
  margin-right: auto;
}

/* Section vertical spacing */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

.section + .section {
  padding-top: 0;
}

/* Full-bleed section (breaks out of page-main) */
.section-bleed {
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* --------------------------------------------------------------------------
   Grids
   -------------------------------------------------------------------------- */

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

@media (max-width: 1023px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */

.hero {
  padding-top: var(--space-20);
  padding-bottom: var(--space-16);
  text-align: center;
}

.hero h1 {
  max-width: 18ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: var(--leading-body);
  max-width: 56ch;
  margin: var(--space-5) auto 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-8);
}

@media (max-width: 767px) {
  .hero {
    padding-top: var(--space-12);
    padding-bottom: var(--space-10);
    text-align: left;
  }

  .hero h1,
  .hero-subtitle {
    margin-left: 0;
    margin-right: 0;
  }

  .hero-actions {
    justify-content: flex-start;
  }
}

/* --------------------------------------------------------------------------
   Site Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
  margin-top: var(--space-24);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6) var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
}

.footer-brand {
  padding-right: var(--space-8);
}

.footer-brand .logo-text {
  font-size: var(--text-base);
}

.footer-brand-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-body);
  margin-top: var(--space-3);
}

.footer-heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-uppercase);
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li + li {
  margin-top: var(--space-2);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

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

.footer-bottom {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.footer-legal {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: var(--leading-body);
  max-width: 80ch;
}

.footer-legal p + p {
  margin-top: var(--space-2);
}

@media (max-width: 1023px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }

  .footer-brand {
    grid-column: span 2;
    padding-right: 0;
  }
}

@media (max-width: 767px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-brand {
    grid-column: span 1;
  }
}