/* ═══════════════════════════════════════════════════════════════
   ObjectifCyber — nav.css
   Header fixe · Footer · Hamburger · Dropdowns · Mobile menu
   ═══════════════════════════════════════════════════════════════ */

/* ═══ HEADER ═══ */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(12,27,51,.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  height: var(--header-h);
  transition: box-shadow var(--dur) var(--ease);
}

#site-header.scrolled {
  box-shadow: 0 4px 24px rgba(0,0,0,.25);
}

.nav-container {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
  gap: var(--sp-4);
}

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

.logo-mark {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-mark svg {
  width: 36px;
  height: 36px;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.3px;
}

.logo-text span {
  color: var(--teal-light);
}

/* ═══ NAV DESKTOP ═══ */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  margin-left: var(--sp-6);
  flex: 1;
}

.nav-links > a,
.nav-dropdown > a {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 6px 12px;
  border-radius: var(--r-sm);
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.nav-links > a:hover,
.nav-dropdown > a:hover,
.nav-links > a.active {
  color: var(--white);
  background: rgba(255,255,255,.1);
}

/* ═══ DROPDOWN ═══ */
.nav-dropdown {
  position: relative;
}

.nav-dropdown > a {
  cursor: pointer;
}

.dropdown-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  border-radius: var(--r);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-100);
  min-width: 220px;
  padding: var(--sp-2);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), visibility var(--dur-fast);
  z-index: 100;
}

.nav-dropdown:hover .dropdown-panel,
.nav-dropdown:focus-within .dropdown-panel {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-panel a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  color: var(--text);
  border-radius: var(--r-sm);
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast);
}

.dropdown-panel a:hover {
  background: var(--gray-50);
  color: var(--blue);
}

.dropdown-panel.wide {
  min-width: 620px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-1);
  left: 0;
  transform: translateY(-8px);
}

.nav-dropdown:hover .dropdown-panel.wide,
.nav-dropdown:focus-within .dropdown-panel.wide {
  transform: translateY(0);
}

.dropdown-section-title {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 8px 14px 4px;
}

/* ═══ NAV ACTIONS ═══ */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-left: auto;
  flex-shrink: 0;
}

/* ═══ FONT SIZE TOGGLE ═══ */
.font-size-toggle {
  display: inline-flex;
  align-items: center;
  padding: 5px 9px;
  border: 1.5px solid rgba(255,255,255,.3);
  border-radius: var(--r-sm);
  background: none;
  color: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  line-height: 1;
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.font-size-toggle:hover,
.font-size-toggle[aria-pressed="true"] {
  border-color: var(--teal-light);
  background: rgba(18,168,152,.15);
  color: var(--teal-light);
}
body.font-large { font-size: 1.2rem; }
body.font-large p, body.font-large li, body.font-large td { font-size: 1.05rem; }
body.font-large .nav-link, body.font-large .mobile-menu a { font-size: 1rem; }

.btn-nav-ghost {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: var(--r-sm);
  font-size: 0.85rem;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  border: 1.5px solid rgba(255,255,255,.25);
  transition: all var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.btn-nav-ghost:hover {
  color: var(--white);
  border-color: rgba(255,255,255,.6);
  background: rgba(255,255,255,.08);
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--r-sm);
  font-size: 0.88rem;
  font-weight: 700;
  background: var(--orange);
  color: var(--white);
  transition: all var(--dur-fast) var(--ease);
  white-space: nowrap;
}

.btn-nav-cta:hover {
  background: var(--orange-lt);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(229,91,4,.4);
}

/* ═══ HAMBURGER ═══ */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--r-sm);
  transition: background var(--dur-fast);
}

.hamburger:hover { background: rgba(255,255,255,.1); }

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur-fast);
  transform-origin: center;
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ═══ MOBILE MENU ═══ */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  bottom: 0;
  /* solid opaque background — distinct from any page bg */
  background: #0c1b33;
  border-top: 2px solid var(--teal);
  box-shadow: 0 8px 32px rgba(0,0,0,.6);
  overflow-y: auto;
  padding: var(--sp-5) var(--sp-6) var(--sp-10);
  /* z-index above everything including the header (1000) */
  z-index: 1100;
  transform: translateX(100%);
  transition: transform .28s cubic-bezier(.4,0,.2,1);
}

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

.mobile-menu a {
  display: block;
  padding: 13px 0;
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255,255,255,.9);
  border-bottom: 1px solid rgba(255,255,255,.1);
  text-decoration: none;
  transition: color var(--dur-fast), padding-left var(--dur-fast);
}

.mobile-menu a:hover,
.mobile-menu a:focus {
  color: var(--teal-light);
  padding-left: 6px;
}

.mobile-menu .mobile-section {
  margin-bottom: var(--sp-2);
}

.mobile-menu .mobile-section-title {
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.8px;
  color: var(--teal-light);
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-1);
  padding-bottom: var(--sp-1);
  border-bottom: 1px solid rgba(13,138,126,.3);
}

.mobile-menu .mobile-section a {
  padding: 10px 0 10px var(--sp-4);
  font-size: 0.92rem;
  color: rgba(255,255,255,.78);
  border-bottom-color: rgba(255,255,255,.06);
}

.mobile-menu .mobile-section a:hover,
.mobile-menu .mobile-section a:focus {
  color: var(--white);
}

.mobile-actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: var(--sp-8);
  padding-top: var(--sp-6);
  border-top: 1px solid rgba(255,255,255,.12);
}

/* ═══ BODY OFFSET ═══ */
body { padding-top: var(--header-h); }

/* ═══ FOOTER ═══ */
footer {
  background: var(--navy);
  color: rgba(255,255,255,.8);
  padding-block: var(--sp-12) var(--sp-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: var(--sp-6);
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
  margin-bottom: var(--sp-10);
}

.footer-brand .footer-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: var(--sp-3);
  letter-spacing: -0.3px;
}

.footer-brand .footer-logo span { color: var(--teal-light); }

.footer-brand p {
  font-size: 0.88rem;
  color: rgba(255,255,255,.6);
  line-height: 1.6;
  margin-bottom: var(--sp-2);
}

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--white);
  margin-bottom: var(--sp-4);
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  color: rgba(255,255,255,.6);
  margin-bottom: var(--sp-2);
  text-decoration: none;
  transition: color var(--dur-fast);
}

.footer-col a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
  padding-top: var(--sp-6);
  border-top: 1px solid rgba(255,255,255,.08);
  font-size: 0.8rem;
  color: rgba(255,255,255,.4);
}

.footer-bottom a {
  color: rgba(255,255,255,.4);
  text-decoration: none;
  transition: color var(--dur-fast);
}

.footer-bottom a:hover { color: rgba(255,255,255,.8); }

.footer-privacy {
  margin-top: var(--sp-3);
  font-size: 0.78rem;
  color: rgba(255,255,255,.3);
  text-align: center;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

/* ═══ BREADCRUMB ═══ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}

.breadcrumb a { color: var(--blue); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--gray-400); }
.breadcrumb .current { color: var(--text); }

/* ═══ SKIP LINK (accessibilité) ═══ */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--sp-4);
  background: var(--blue);
  color: var(--white);
  padding: var(--sp-3) var(--sp-5);
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  font-weight: 600;
  z-index: 9999;
  transition: top var(--dur-fast);
}

.skip-link:focus { top: 0; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1023px) {
  .nav-links { display: none; }
  .btn-nav-ghost { display: none; }
  .hamburger { display: flex; }
  .mobile-menu { display: block; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 1280px) and (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--sp-4);
  }
}

@media (max-width: 767px) {
  .nav-container { padding-inline: var(--sp-4); }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-6);
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 479px) {
  .btn-nav-cta { display: none; }
}