/* ===================================================================
   Capitalys — Header centralisé
   Une seule source de vérité pour le header sur toutes les pages.
   Convention BEM : .site-header (block), __ (element), -- (modifier)
   =================================================================== */

/* ── Block : le conteneur header ──────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--hdr-h);
  padding: 0 32px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Modifier : header fixed (pour pages qui ont besoin de superposition) */
.site-header--fixed {
  position: fixed;
}

/* ── Element : zone logo (clickable wrapper) ──────────────────────── */
.site-header__logo-link {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 100%;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity 0.15s ease;
}
.site-header__logo-link:hover {
  opacity: 0.7;
  text-decoration: none;
}
.site-header__logo-link:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
  border-radius: 2px;
}

/* ── Element : marque (texte CAPITALYS) ───────────────────────────── */
.site-header__brand {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text);
}

/* ── Element : sous-titre (Capitalys Academy) ─────────────────────── */
.site-header__brand-sub {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0;
  text-transform: none;
}

/* ── Element : zone droite (nav, boutons, etc.) ───────────────────── */
.site-header__nav {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* ── Element : liens de navigation ────────────────────────────────── */
.site-header__link {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.site-header__link:hover {
  color: var(--text);
}

/* ── Element : lien retour (← Retour à l'accueil) ─────────────────── */
.site-header__back {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s ease;
}
.site-header__back:hover {
  color: var(--text);
}

/* ── Modifier : header version minimale (auth, privées) ───────────── */
.site-header--minimal .site-header__nav {
  gap: 18px;
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .site-header {
    padding: 0 18px;
  }
  .site-header__nav {
    gap: 14px;
  }
  .site-header__brand-sub {
    display: none;
  }
}


/* ── Lang toggle button (FR/EN) — canonical from landing.css ─────── */
.lang-toggle-btn,
.lang-toggle-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  transition: border-color 0.15s ease, background 0.15s ease;
  letter-spacing: 0.5px;
}
.lang-toggle-btn:hover,
.lang-toggle-link:hover {
  background: var(--dark-d);
  border-color: var(--dark);
}
.lang-toggle-btn .lang-fr,
.lang-toggle-link .lang-fr,
.lang-toggle-btn .lang-en,
.lang-toggle-link .lang-en {
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.15s ease, background 0.15s ease;
}
.lang-toggle-btn .active,
.lang-toggle-link .active {
  color: var(--text);
  background: var(--dark-d);
}
.lang-toggle-btn .lang-sep,
.lang-toggle-link .lang-sep {
  color: var(--dim);
  opacity: 0.5;
}

/* Reset des styles <a> par défaut pour le toggle de langue */
.lang-toggle-link {
  text-decoration: none;
}
.lang-toggle-link:hover {
  text-decoration: none;
}

/* ── CTA group: "Sign in" link + "Create account" button (mirrors course.html style) ── */
.hdr-cta-group {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.hdr-cta-group .hdr-link {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: background 0.12s;
}
.hdr-cta-group .hdr-link:hover {
  background: rgba(0, 0, 0, 0.05);
}
.hdr-cta-group .btn-primary.btn-sm {
  font-family: var(--sans);
  font-size: 13.5px;
  font-weight: 500;
  padding: 9px 18px;
  border-radius: 8px;
}
@media (max-width: 600px) {
  .hdr-cta-group .hdr-link {
    display: none;
  }
}

/* ── Anti-FOUC: hide user areas until Auth state is confirmed ── */
#hdr-user-slot:not(.ready),
#hdr-cta-signup:not(.ready) {
  visibility: hidden;
}