/* ========================================
   NAVIGATION
   ======================================== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: var(--space-4) 0;
  transition: padding var(--duration-normal) var(--ease-out),
              background var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.nav--scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  box-shadow: 0 1px 0 rgba(10, 15, 13, 0.06);
  padding: var(--space-3) 0;
}

/* Remove backdrop-filter when mobile menu is open to avoid containing block issues */
.nav--menu-open.nav--scrolled {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  background: var(--color-white);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- Brand --- */
.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: opacity var(--duration-fast) var(--ease-out);
}

.nav__brand:hover {
  opacity: 0.8;
}

.nav__logo {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
}

.nav__logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav__brand-text {
  display: flex;
  flex-direction: column;
}

.nav__name {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.2;
  transition: color var(--duration-normal) var(--ease-out);
}

.nav__subtitle {
  font-size: var(--text-xs);
  color: var(--color-gold-300);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  transition: color var(--duration-normal) var(--ease-out);
}

.nav--scrolled .nav__name {
  color: var(--color-neutral-900);
}

.nav--scrolled .nav__subtitle {
  color: var(--color-primary-600);
}

/* --- Links --- */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-gold-400);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  transform: translateX(-50%);
}

.nav__link:hover {
  color: var(--color-white);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 20px;
}

.nav__link--active {
  color: var(--color-white);
  font-weight: 600;
}

/* Quand scrollé : texte foncé sur fond blanc */
.nav--scrolled .nav__link {
  color: var(--color-neutral-600);
}

.nav--scrolled .nav__link:hover {
  color: var(--color-neutral-900);
}

.nav--scrolled .nav__link--active {
  color: var(--color-primary-700);
}

.nav--scrolled .nav__link::after {
  background: var(--color-primary-500);
}

/* --- Mobile Toggle --- */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  z-index: calc(var(--z-nav) + 20);
}

.nav__toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

.nav--scrolled .nav__toggle-line {
  background: var(--color-neutral-800);
}

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

.nav__toggle--active .nav__toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* --- Mobile Drawer Menu --- */

/* Backdrop overlay — hidden on desktop */
.nav__backdrop {
  display: none;
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  /* Semi-transparent backdrop — outside nav, below nav z-index but above page content */
  .nav__backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-nav) - 1);
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-normal) var(--ease-out);
  }

  .nav__backdrop--visible {
    opacity: 1;
    visibility: visible;
  }

  /* Drawer panel — outside nav, slides from right */
  .nav__links {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    width: 75%;
    max-width: 320px;
    z-index: calc(var(--z-nav) + 2);
    background: var(--color-white);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: 0;
    padding: calc(var(--space-6) * 3) var(--space-6) var(--space-6);
    transform: translateX(100%);
    transition: transform var(--duration-normal) var(--ease-out);
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
    list-style: none;
    margin: 0;
  }

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

  .nav__links li {
    overflow: hidden;
  }

  .nav__link {
    display: block;
    font-size: var(--text-lg);
    font-family: var(--font-heading);
    padding: var(--space-3) var(--space-4);
    color: var(--color-neutral-700);
    border-radius: 0;
    transition: all var(--duration-fast) var(--ease-out);
    transform: translateX(20px);
    opacity: 0;
  }

  /* Hide desktop underline in mobile drawer */
  .nav__link::after {
    display: none;
  }

  .nav__link:hover {
    background: var(--color-primary-50);
    color: var(--color-primary-700);
  }

  .nav__link--active {
    color: var(--color-primary-700);
    font-weight: 600;
  }

  .nav__links--open .nav__link {
    transform: translateX(0);
    opacity: 1;
  }

  .nav__links--open li:nth-child(1) .nav__link { transition-delay: 80ms; }
  .nav__links--open li:nth-child(2) .nav__link { transition-delay: 140ms; }
  .nav__links--open li:nth-child(3) .nav__link { transition-delay: 200ms; }
  .nav__links--open li:nth-child(4) .nav__link { transition-delay: 260ms; }

  /* Separator between links */
  .nav__links li + li {
    border-top: 1px solid var(--color-neutral-100);
  }

  .nav__container {
    padding: 0 var(--space-4);
  }
}