/* ═══════════════════════════════════════════════════════════
   NAV.CSS — Navigation principale & mobile
═══════════════════════════════════════════════════════════ */

/* ── Barre principale ── */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition-med), backdrop-filter var(--transition-med);
}

#nav.scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
}

/* ── Logo ── */
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  color: var(--c-primary);
  letter-spacing: 0.05em;
  line-height: 1;
}

.nav-logo span {
  color: var(--c-accent);
}

/* ── Liens desktop ── */
.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-primary);
  transition: width 0.3s var(--ease-out-expo);
}

.nav-links a:hover {
  color: var(--c-text);
}

.nav-links a:hover::after {
  width: 100%;
}

/* ── CTA nav ── */
.nav-cta {
  background: var(--c-primary) !important;
  color: white !important;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav-cta:hover {
  background: var(--c-accent2) !important;
  transform: scale(1.05);
}

.nav-cta::after {
  display: none !important;
}

/* ── Hamburger ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

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

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

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

/* ── Menu mobile overlay ── */
.nav-mobile-menu {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.97);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.nav-mobile-menu.open {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
}

.nav-mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 4rem);
  color: var(--c-text);
  letter-spacing: 0.05em;
  transition: color var(--transition-fast);
}

.nav-mobile-menu a:hover {
  color: var(--c-primary);
}

.nav-mobile-close {
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 2rem;
  color: var(--c-muted);
  background: none;
  border: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links      { display: none; }
  .nav-hamburger  { display: flex; }
}