/* -------------------------------------------------------------------------- */
/* Navbar immersive                                                             */
/* -------------------------------------------------------------------------- */

.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  z-index: 1000;
  background: transparent;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.navbar::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(var(--abyss-rgb), 0.65) 0%, rgba(var(--abyss-rgb), 0) 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.navbar.scrolled {
  background: rgba(var(--abyss-rgb), 0.9);
  backdrop-filter: saturate(140%) blur(18px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 16px 40px rgba(var(--abyss-rgb), 0.55);
}

.navbar.scrolled::after {
  opacity: 0;
}

.nav-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(1100px, 92vw);
  margin: 0 auto;
  gap: clamp(1rem, 4vw, 2rem);
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.65rem, 2vw, 1.1rem);
}

.nav-menu-left {
  justify-self: start;
}

.nav-menu-right {
  justify-self: end;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: inherit;
}

.nav-link {
  position: relative;
  padding: 0.35rem 0.25rem;
  color: rgba(var(--silver-rgb), 0.9);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  white-space: nowrap;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  inset: auto 0 -0.35rem;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s ease;
  background: linear-gradient(90deg, rgba(var(--silver-rgb), 0), rgba(var(--pearl-rgb), 0.8), rgba(var(--silver-rgb), 0));
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--pearl);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.navbar.scrolled .nav-link {
  color: rgba(var(--silver-rgb), 0.9);
  text-shadow: none;
}

.nav-logo {
  justify-self: center;
  position: relative;
  z-index: 1;
}

.nav-logo img {
  height: clamp(126px, 18vw, 168px);
  filter: var(--logo-filter);
  transition: transform 0.3s ease;
}

.nav-logo:hover img {
  transform: scale(1.04);
}

.hamburger {
  display: none;
  position: relative;
  z-index: 1001;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.4rem;
  border-radius: 50%;
  border: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.hamburger:focus-visible {
  outline: 2px solid rgba(var(--silver-rgb), 0.7);
  outline-offset: 3px;
}

.bar {
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  color: var(--pearl);
}

.hamburger.active .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active .bar:nth-child(2) {
  opacity: 0;
}

.hamburger.active .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.navbar.mobile-open::after {
  opacity: 1;
  background: rgba(var(--abyss-rgb), 0.94);
}

.navbar.mobile-open .bar {
  color: var(--pearl);
}

.navbar.scrolled .bar,
.navbar.scrolled .hamburger {
  color: var(--pearl);
}

/* Écrans intermédiaires : liens un peu plus serrés pour tenir à 4 par côté */
@media (min-width: 961px) and (max-width: 1180px) {
  .nav-menu {
    gap: 0.85rem;
  }

  .nav-link {
    font-size: 0.78rem;
    letter-spacing: 0.1em;
  }
}

/* -------------------------------------------------------------------------- */
/* Menu mobile                                                                 */
/* -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .navbar::after {
    background: transparent;
  }

  .nav-container {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
    width: min(100%, 92vw);
  }

  .nav-logo {
    margin: 0;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }

  .nav-logo img {
    height: clamp(126px, 40vw, 168px);
    max-width: min(260px, 85vw);
  }

  .hamburger {
    display: flex;
    background: transparent;
    border: none;
    padding: 0.45rem;
  }

  .nav-menu {
    display: none;
    position: static;
    inset: auto;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    padding: 0;
    gap: 0;
    background: transparent;
    backdrop-filter: none;
    transition: none;
  }

  .navbar.mobile-open {
    height: 100vh;
    align-items: flex-start;
    background: rgba(var(--abyss-rgb), 0.97);
    backdrop-filter: blur(18px);
  }

  .navbar.mobile-open::after {
    opacity: 0;
    background: transparent;
  }

  .navbar.mobile-open .nav-container {
    position: fixed;
    inset: 0;
    width: 100%;
    max-width: none;
    margin: 0;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: calc(var(--nav-h) + 1.5rem) 1.5rem 3.5rem;
    gap: 2.4rem;
    background: transparent;
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .navbar.mobile-open .nav-logo {
    order: -1;
    margin: 0 0 1rem 0;
    position: static;
    transform: none;
  }

  .navbar.mobile-open .nav-logo img {
    height: clamp(126px, 40vw, 180px);
    max-width: min(280px, 85vw);
  }

  .navbar.mobile-open .hamburger {
    position: absolute;
    top: 1.1rem;
    right: 1.2rem;
    background: transparent;
  }

  .navbar.mobile-open .nav-menu {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: min(430px, 90vw);
    gap: 1.8rem;
  }

  .navbar.mobile-open .nav-menu-right {
    padding-top: 1.8rem;
    border-top: 1px solid var(--border);
  }

  .navbar.mobile-open .nav-list {
    width: 100%;
    flex-direction: column;
    align-items: center;
    gap: 1.4rem;
  }

  .navbar.mobile-open .nav-link {
    font-size: 1rem;
    letter-spacing: 0.22em;
  }
}

@media (max-width: 540px) {
  .navbar.mobile-open .nav-container {
    padding: calc(var(--nav-h) + 1.2rem) 1.25rem 3rem;
    gap: 2rem;
  }

  .navbar.mobile-open .nav-menu {
    width: min(360px, 92vw);
    gap: 1.6rem;
  }

  .navbar.mobile-open .nav-link {
    letter-spacing: 0.2em;
  }
}