/* ==========================================================================
   HEADER + MENU BURGER PLEIN ÉCRAN
   ========================================================================== */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-nav);
  display: flex;
  align-items: center;
  padding: var(--sp-4) var(--container-pad);
  pointer-events: none;
  mix-blend-mode: difference;
}
.site-header * { pointer-events: auto; }

.site-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: var(--ls-wide);
  color: var(--color-white);
}
.site-logo span { color: var(--color-text-faint); }

/* ---- Réseaux visibles dès le header (avant même d'ouvrir le menu) ---- */
.header-socials {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-left: auto;
  margin-right: var(--sp-6);
}
.header-socials a {
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-white);
  opacity: 0.75;
  transition: opacity var(--dur-fast) var(--ease-out);
}
.header-socials a:hover { opacity: 1; }

@media (max-width: 900px) {
  .header-socials { display: none; }
}

/* ---- Bouton burger ---- */
.burger {
  position: relative;
  z-index: var(--z-menu);
  width: 52px;
  height: 52px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: transparent;
  mix-blend-mode: normal;
}
.burger .bar {
  width: 26px;
  height: 1px;
  background: var(--color-white);
  transition: transform var(--dur-med) var(--ease-in-out), opacity var(--dur-fast) var(--ease-out);
}
.burger .label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-white);
  position: absolute;
  bottom: -18px;
}

.burger[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- Overlay plein écran ---- */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-menu) - 1);
  background: var(--color-black);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--sp-8) var(--container-pad);
  clip-path: circle(2% at calc(100% - 48px) 48px);
  transition: clip-path var(--dur-slow) var(--ease-in-out);
  visibility: hidden;
}
.nav-overlay.is-open {
  clip-path: circle(150% at calc(100% - 48px) 48px);
  visibility: visible;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.nav-list li {
  overflow: hidden;
}

.nav-list a {
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-4);
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text-faint);
  transform: translateY(110%);
  transition: transform var(--dur-med) var(--ease-out), color var(--dur-fast) var(--ease-out);
  padding-block: 0.08em;
}

.nav-overlay.is-open .nav-list a {
  transform: translateY(0);
}

.nav-list a .num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-faint);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: var(--color-white);
}

.nav-list a:hover .num { color: var(--color-white); }

.nav-foot {
  position: absolute;
  bottom: var(--sp-6);
  left: var(--container-pad);
  right: var(--container-pad);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-2xs);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-text-faint);
  opacity: 0;
  transition: opacity var(--dur-med) var(--ease-out) 300ms;
}
.nav-overlay.is-open .nav-foot { opacity: 1; }

.nav-foot a { transition: color var(--dur-fast); }
.nav-foot a:hover { color: var(--color-white); }

body.menu-open { overflow: hidden; }