/* Header + footer partagés — injectés par header-footer.js
   Source de vérité : header-footer-template.html
   Mobile-first responsive · WCAG 2.1 AA
*/

/* === HEADER === */
header {
  background-color: var(--white);
  color: var(--black);
  padding: var(--space-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-h);
  font-size: clamp(1.2rem, 4vw, 2.2rem);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--black);
  text-decoration: none;
}

.logo-img {
  height: clamp(2rem, 5vw, 3rem);
  width: auto;
  display: block;
  flex-shrink: 0;
}

/* Nav links (hidden on mobile, visible on desktop) */
.nav-links {
  display: none;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-family: var(--font-h);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  align-items: center;
}

.nav-links a {
  color: var(--black);
  padding: 0.25rem 0.1rem;
  position: relative;
  text-decoration: none;
}

.nav-links a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  transform: translateX(-50%) scale(0);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--blue);
  transition: transform 0.15s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: translateX(-50%) scale(1);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue);
}

/* WCAG 2.4.7 Focus Visible */
.nav-links a:focus-visible,
.logo:focus-visible,
.header-cta:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

/* Burger button (visible on mobile, hidden on desktop) */
.burger-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1002;
}

.burger-btn span {
  display: block;
  width: 28px;
  height: 3px;
  background-color: var(--black);
  transition: background-color 0.15s;
}

.burger-btn:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

/* Header actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  gap: 0;
}

.lang-btn {
  font-family: var(--font-h);
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 3px solid var(--black);
  background: transparent;
  color: var(--black);
  padding: 0.4rem 0.9rem;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.lang-btn + .lang-btn {
  border-left: none;
}

.lang-btn.active,
.lang-btn:hover {
  background: var(--blue);
  border-color: var(--blue);
  color: var(--white);
}

.lang-btn:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-h);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 3px solid var(--blue);
  background: var(--blue);
  color: var(--white);
  padding: 0.4rem 0.75rem;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.header-cta:hover {
  background: var(--white);
  color: var(--blue);
}

/* === MOBILE OVERLAY === */
.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100dvh;
  background-color: var(--black);
  color: var(--white);
  z-index: 2000;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: var(--space-md);
}

.mobile-overlay.is-active {
  display: flex;
}

.close-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: none;
  border: none;
  color: var(--white);
  font-size: 3rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  z-index: 2002;
}

.close-btn:hover {
  color: var(--blue);
}

.close-btn:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.mobile-nav-link {
  font-family: var(--font-h);
  font-size: 2rem;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--white);
  padding: 0.5rem 1rem;
}

.mobile-nav-link:hover {
  color: var(--blue);
}

.mobile-nav-link:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

/* === FOOTER === */
footer {
  background-color: var(--black);
  color: var(--white);
  padding: var(--space-xl) 0 var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  align-items: start;
}

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

.footer-links h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  color: var(--white);
}

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

.footer-links a {
  color: #CCC;
  font-size: 1.125rem;
  text-decoration: none;
}

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

.footer-links a:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 2px;
}

.footer-branding-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: flex-start;
}

.footer-logo-img {
  max-width: 180px;
  width: 100%;
  height: auto;
  display: block;
}

.footer-slogan {
  font-family: var(--font-b);
  font-size: 1.125rem;
  color: #CCC;
  line-height: 1.4;
  margin: 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.footer-copy {
  font-weight: 500;
  color: var(--white);
}

/* === DESKTOP (min-width: 768px) === */
@media (min-width: 768px) {
  header {
    padding: var(--space-md) 0;
  }

  .header-inner {
    gap: var(--space-sm);
  }

  .logo {
    gap: 0.75rem;
  }

  /* Show nav links on desktop */
  .nav-links {
    display: flex;
  }

  /* Hide burger on desktop */
  .burger-btn {
    display: none;
  }

  .header-cta {
    font-size: 1rem;
    padding: 0.4rem 0.9rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 2fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
  }

  .footer-links {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
  }

  .footer-logo-img {
    max-width: 220px;
  }

  .footer-slogan {
    font-size: 1.25rem;
  }
}