/* ============================================================
   NAVBAR.CSS — Navigation principale + menu burger mobile
   ============================================================ */

/* ── Structure de base ──────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);

  /* Fond transparent au départ, opacifié au scroll (via JS) */
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background-color var(--transition-slow),
    border-color var(--transition-slow),
    backdrop-filter var(--transition-slow);
}

/* État "scrollé" — ajouté par JS quand window.scrollY > 50 */
.navbar.scrolled {
  background-color: rgba(10, 25, 47, 0.92);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom-color: var(--border-subtle);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* ── Contenu de la nav ──────────────────────────────────── */
.navbar .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

/* ── Logo ───────────────────────────────────────────────── */
.navbar-logo {
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-white);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
  flex-shrink: 0;

  /* Empêche le texte de casser */
  white-space: nowrap;
}

.navbar-logo .text-accent {
  color: var(--accent-cyan);
  transition: text-shadow var(--transition-base);
}

.navbar-logo:hover {
  color: var(--accent-cyan);
}

.navbar-logo:hover .text-accent {
  text-shadow: 0 0 12px rgba(100, 255, 218, 0.6);
}

/* ── Liens de navigation (desktop) ─────────────────────── */
.navbar-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar-links li {
  position: relative;
}

.navbar-links a {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);

  /* Numéro de section en pseudo-element */
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* Numéros de section générés en CSS (:nth-child) */
.navbar-links li:nth-child(1) a::before { content: "01. "; }
.navbar-links li:nth-child(2) a::before { content: "02. "; }
.navbar-links li:nth-child(3) a::before { content: "03. "; }
.navbar-links li:nth-child(4) a::before { content: "04. "; }

.navbar-links a::before {
  color: var(--accent-cyan);
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
}

.navbar-links a:hover {
  color: var(--text-white);
  background-color: rgba(100, 255, 218, 0.05);
}

/* Lien actif (section visible) */
.navbar-links a.active {
  color: var(--accent-cyan);
}

/* ── Bouton CV ──────────────────────────────────────────── */
.navbar .btn-sm {
  font-family: var(--font-mono);
  margin-left: var(--space-4);
  flex-shrink: 0;
}

/* ── Hamburger (mobile) ─────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 0;
  z-index: 1100;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-white);
  border-radius: var(--radius-full);
  transition:
    transform var(--transition-base),
    opacity var(--transition-base),
    background-color var(--transition-fast);
  transform-origin: center;
}

/* État ouvert du hamburger → croix "×" */
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

.hamburger[aria-expanded="true"] span {
  background-color: var(--accent-cyan);
}

/* ── Menu mobile overlay ────────────────────────────────── */
@media (max-width: 768px) {

  .hamburger {
    display: flex;
  }

  /* Le bouton CV se cache dans la nav desktop, réapparaît dans le menu mobile */
  .navbar > .container > .btn-sm {
    display: none;
  }

  .navbar-links {
    /* Overlay plein écran */
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    background-color: rgba(10, 25, 47, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);

    /* Caché par défaut */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition:
      opacity var(--transition-slow),
      visibility var(--transition-slow),
      transform var(--transition-slow);
    z-index: 1050;
  }

  /* État ouvert */
  .navbar-links.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateY(0);
  }

  .navbar-links li {
    text-align: center;
    opacity: 0;
    transform: translateY(12px);
    transition:
      opacity var(--transition-slow),
      transform var(--transition-slow);
  }

  /* Animation en cascade des liens */
  .navbar-links.is-open li:nth-child(1) { opacity: 1; transform: none; transition-delay: 60ms; }
  .navbar-links.is-open li:nth-child(2) { opacity: 1; transform: none; transition-delay: 120ms; }
  .navbar-links.is-open li:nth-child(3) { opacity: 1; transform: none; transition-delay: 180ms; }
  .navbar-links.is-open li:nth-child(4) { opacity: 1; transform: none; transition-delay: 240ms; }

  .navbar-links a {
    font-size: var(--fs-xl);
    padding: var(--space-4) var(--space-8);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
  }

  .navbar-links a::before {
    font-size: var(--fs-xs);
  }

  /* Bouton CV dans le menu mobile */
  .navbar-links::after {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background: var(--border-normal);
    margin-top: var(--space-4);
  }
}

/* ── Desktop large ──────────────────────────────────────── */
@media (min-width: 769px) {
  .hamburger {
    display: none !important;
  }

  .navbar-links {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: all !important;
    transform: none !important;
    position: static !important;
    flex-direction: row !important;
    background: transparent !important;
    backdrop-filter: none !important;
  }
}