/* ==========================================================================
   Layout — Header, footer, nav, shared page shell
   ========================================================================== */

/* --- Skip to Content (Accessibility) --- */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--color-accent);
  color: var(--color-white);
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body);
  font-size: var(--text-small);
  border-radius: var(--border-radius-button);
  z-index: 1000;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-xs);
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--duration-medium) ease,
              border-color var(--duration-medium) ease;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: var(--color-base);
  border-bottom-color: var(--color-divider);
}

.site-header .grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
}

/* Nav logo */
.nav-logo {
  display: flex;
  align-items: center;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-logo-svg {
  height: 40px;
  width: auto;
}

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

.nav-links a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-nav);
  letter-spacing: 0.02em;
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

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

.nav-links a.is-active {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 6px;
  text-decoration-thickness: 2px;
}

/* Nav CTA button */
.btn-nav {
  padding: 10px 24px;
  font-size: var(--text-nav);
}

/* Hamburger button */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  position: relative;
  width: 32px;
  height: 32px;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  position: absolute;
  left: 4px;
  transition: transform var(--duration-medium) ease,
              opacity var(--duration-medium) ease;
}

.nav-toggle-bar:nth-child(1) { top: 8px; }
.nav-toggle-bar:nth-child(2) { top: 15px; }
.nav-toggle-bar:nth-child(3) { top: 22px; }

.nav-toggle.is-open .nav-toggle-bar:nth-child(1) {
  transform: rotate(45deg);
  top: 15px;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open .nav-toggle-bar:nth-child(3) {
  transform: rotate(-45deg);
  top: 15px;
}

/* Mobile overlay */
.nav-overlay {
  display: none;
}

/* --- Mobile Navigation --- */

@media (max-width: 767px) {
  .nav-links,
  .btn-nav-desktop {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-base);
    z-index: 99;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-xl);
  }

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

  .nav-overlay a {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--color-primary);
    text-decoration: none;
  }

  .nav-overlay a.is-active {
    color: var(--color-accent);
  }

  .nav-overlay .btn-primary {
    margin-top: var(--space-md);
  }
}

/* --- Sections --- */

.section {
  padding: var(--section-padding-desktop) 0;
}

.section--alt {
  background: var(--color-section-alt);
}

.section--hero {
  display: flex;
  align-items: center;
  min-height: 100vh;
  padding-top: var(--space-4xl);
  padding-bottom: var(--space-3xl);
  position: relative;
}

.section--inner-hero {
  padding-top: var(--inner-hero-padding-top);
  padding-bottom: var(--space-3xl);
}

.section--cta {
  padding: var(--space-4xl) 0;
  text-align: center;
  background: var(--color-section-alt);
}

/* Shared CTA content (used across all pages) */
.cta-content {
  max-width: 540px;
  margin: 0 auto;
}

.cta-content h2 {
  margin-bottom: var(--space-md);
}

.cta-content .text-lead {
  margin: 0 auto var(--space-xl);
  max-width: 540px;
}

.cta-email {
  display: block;
  margin-top: var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--color-secondary);
}

.cta-email a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cta-email a:hover {
  text-decoration-color: transparent;
}

@media (max-width: 1199px) {
  .section {
    padding: var(--section-padding-tablet) 0;
  }

  .section--inner-hero {
    padding-top: 120px;
    padding-bottom: var(--space-xl);
  }

  .section--cta {
    padding: var(--section-padding-tablet) 0;
  }
}

@media (max-width: 767px) {
  .section {
    padding: var(--section-padding-mobile) 0;
  }

  .section--hero {
    min-height: auto;
    padding-top: 120px;
    padding-bottom: var(--section-padding-mobile);
  }

  .section--inner-hero {
    padding-top: 100px;
    padding-bottom: var(--space-lg);
  }

  .section--cta {
    padding: var(--section-padding-mobile) 0;
  }
}

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

.site-footer {
  border-top: 1px solid var(--color-divider);
}

/* Upper footer: logo + social */
.footer-upper {
  padding: var(--space-xl) 0;
}

.footer-upper .grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  color: var(--color-primary);
}

.footer-logo-svg {
  height: 56px;
  width: auto;
}

.footer-links {
  display: flex;
  gap: var(--space-sm);
}

.footer-links a {
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

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

.footer-links svg {
  width: 20px;
  height: 20px;
}

/* Footer legal links */
.footer-legal {
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--color-divider);
}

.footer-legal-links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.footer-legal-links a {
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--color-secondary);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

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

/* Lower footer: copyright */
.footer-lower {
  background: #0A1F1A;
  padding: var(--space-sm) 0;
}

.footer-lower .grid {
  display: flex;
  justify-content: center;
}

.footer-copy {
  font-family: var(--font-body);
  font-size: var(--text-small);
  color: var(--color-base);
  text-align: center;
}

.footer-copy a {
  color: var(--color-base);
  text-decoration: none;
  transition: opacity var(--duration-fast) ease;
}

.footer-copy a:hover {
  opacity: 0.7;
}