:root {
  --nav-h: 68px;
  --nav-bg: rgba(13, 63, 107, 0.96);
  --nav-border: rgba(255, 255, 255, 0.15);
  --navy-dark: #0D3F6B;
}

/* Overlay */
.nav-overlay {
  position: fixed;
  inset: 0;
  top: var(--nav-h);
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 998;
}
.nav-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--nav-border);
  transition: box-shadow 0.3s ease;
}
#navbar.scrolled {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.nav-inner {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo { display: inline-flex; align-items: center; text-decoration: none; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links li { position: relative; }

.nav-links > li > a,
.nav-dropdown-trigger {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  text-decoration: none;
  padding: 0.5rem 0;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color 0.2s ease;
}
.nav-links > li > a:hover,
.nav-links > li > a.active,
.nav-dropdown-trigger:hover {
  color: #fff;
}

/* soulignement discret desktop */
@media (min-width: 901px) {
  .nav-links > li:not(.dropdown) > a,
  .nav-dropdown-trigger {
    position: relative;
  }
  .nav-links > li:not(.dropdown) > a::after,
  .nav-dropdown-trigger::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--green, #00ffb2);
    transition: width 0.2s ease;
  }
  .nav-links > li:not(.dropdown) > a:hover::after,
  .nav-links > li:not(.dropdown) > a.active::after,
  .nav-dropdown-trigger:hover::after {
    width: 100%;
  }
}

/* Flèche Services */
.nav-dropdown-trigger::before {
  content: "\f107";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.65rem;
  margin-left: 0.25rem;
  order: 2;
  transition: transform 0.25s ease;
}

/* Supprimer toute autre flèche parasite */
.nav-dropdown-trigger::after {
  display: none !important;
}

@media (min-width: 901px) {
  .nav-links .dropdown:hover .nav-dropdown-trigger::before {
    transform: rotate(180deg);
  }
}
.nav-links.mobile-open .dropdown.dropdown-open .nav-dropdown-trigger::before {
  transform: rotate(180deg);
}

/* Dropdown desktop */
.nav-links .dropdown-menu {
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  min-width: 260px;
  background: rgba(13, 63, 107, 0.98);
  backdrop-filter: blur(12px);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  z-index: 1001;
}

@media (min-width: 901px) {
  .nav-links .dropdown:hover .dropdown-menu,
  .nav-links .dropdown.dropdown-open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(10px);
  }
}

.nav-links .dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 1.1rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.nav-links .dropdown-menu a i {
  width: 1.1rem;
  text-align: center;
  color: var(--cyan, #1a9fd6);
  opacity: 0.9;
}
.nav-links .dropdown-menu a:hover {
  background: rgba(26, 159, 214, 0.12);
  border-left-color: var(--cyan, #1a9fd6);
  color: #fff;
}

.dropdown-section-title {
  display: block;
  padding: 0.45rem 1.1rem 0.35rem;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan, #1a9fd6);
  font-weight: 700;
}

.nav-cta {
  flex-shrink: 0;
  background: #00b894;
  color: #ffffff;
  padding: 0.55rem 1.2rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 4px 14px rgba(0, 184, 148, 0.35);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 184, 148, 0.5);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: 8px;
  z-index: 1001;
}
.nav-hamburger:hover {
  background: rgba(255, 255, 255, 0.06);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 0 auto;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile / tablette */
@media (max-width: 900px) {
  .nav-links,
  .nav-cta {
    display: none;
  }
  .nav-hamburger {
    display: inline-flex !important;
  }

  .nav-links.mobile-open {
    display: flex !important;
    flex-direction: column;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--nav-h));
    overflow-y: auto;
    padding: 0.75rem 1.25rem 1.25rem;
    gap: 0;
    background: rgba(13, 63, 107, 0.98);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--nav-border);
    z-index: 999;
    -webkit-overflow-scrolling: touch;
  }

  .nav-links.mobile-open > li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .nav-links.mobile-open > li:last-child {
    border-bottom: none;
  }

  .nav-links.mobile-open > li > a,
  .nav-links.mobile-open .nav-dropdown-trigger {
    min-height: 48px;
    padding: 0.85rem 0.25rem;
    font-size: 1rem;
    font-weight: 500;
    width: 100%;
    justify-content: space-between;
  }

  .nav-links.mobile-open .dropdown-menu {
    display: none;
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    min-width: 0;
    margin: 0 0 0.5rem;
    padding: 0 0 0.35rem 0.5rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(26, 159, 214, 0.15);
    border-radius: 10px;
    box-shadow: none;
  }

  /* IMPORTANT : afficher le sous-menu au clic */
  .nav-links.mobile-open .dropdown.dropdown-open .dropdown-menu {
    display: block;
  }

  .nav-links.mobile-open .dropdown-menu a {
    min-height: 44px;
    padding: 0.65rem 0.75rem;
    font-size: 0.92rem;
    border-left: none;
    border-radius: 8px;
  }
  .nav-links.mobile-open .dropdown-menu a:hover {
    background: rgba(26, 159, 214, 0.15);
  }

  .nav-links.mobile-open .dropdown-section-title {
    padding: 0.5rem 0.75rem 0.25rem;
    margin-bottom: 0;
    border: none;
  }
}