/* Header (nav) — voir nafabeat-spec/algos/IHM/page_acceuil/IHM_PAGE_ACCUEIL_ORCHESTRATOR_algo.md
   (section Header) et mockups/hero_mockup.html (source de vérité visuelle). */

nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 18px 48px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(26,26,46,0.94);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(10px);
  transition: border-color 0.4s, padding 0.3s;
}
nav.scrolled { border-color: rgba(202,138,4,0.25); padding: 12px 48px; }

.nav-brand { display: flex; align-items: center; gap: 10px; }
.nav-mark { flex-shrink: 0; }
.nav-logo { font-family: var(--font-display); font-size: 21px; color: var(--text-cream); letter-spacing: -0.3px; }
.nav-logo span { color: var(--gold); }

.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 13px; color: var(--text-sec-dark); text-decoration: none; transition: color 0.2s; white-space: nowrap; }
.nav-links a:hover { color: var(--gold-light); }

.nav-right { display: flex; align-items: center; gap: 18px; }
.nav-login {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-sec-dark); white-space: nowrap;
  text-decoration: none; background: transparent;
  border: 1px solid rgba(248,244,239,0.22); border-radius: 4px; padding: 6px 12px;
  transition: color 0.2s, border-color 0.2s;
}
.nav-login:hover { color: var(--gold-light); border-color: rgba(226,168,50,0.5); }
.nav-login-icon { width: 14px; height: 14px; flex-shrink: 0; }

.lang-switch { display: flex; background: rgba(248,244,239,0.06); border: 1px solid var(--border-dark); border-radius: 20px; padding: 3px; }
.lang-btn {
  background: transparent; border: none; color: var(--text-sec-dark);
  font-size: 11.5px; font-weight: 700; letter-spacing: 0.4px;
  padding: 5px 12px; border-radius: 16px; cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.lang-btn.active { background: var(--gold); color: var(--marine); }
.lang-btn:not(.active):hover { color: var(--text-cream); }

.nav-cta {
  background: var(--gold); color: var(--marine); border: none; border-radius: 4px;
  padding: 10px 20px; font-size: 13px; font-weight: 700; cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.nav-cta:hover { background: var(--gold-light); }
.nav-cta:active { transform: scale(0.97); }

/* ---------- Navigation mobile (< 900px) — hamburger + panneau ---------- */
.nav-hamburger {
  display: none;
  background: transparent; border: none; cursor: pointer;
  width: 32px; height: 32px; padding: 0; flex-shrink: 0;
  position: relative;
}
.nav-hamburger span {
  position: absolute; left: 5px; right: 5px; height: 2px;
  background: var(--text-cream); border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.2s ease, top 0.25s ease;
}
.nav-hamburger span:nth-child(1) { top: 10px; }
.nav-hamburger span:nth-child(2) { top: 15px; }
.nav-hamburger span:nth-child(3) { top: 20px; }
.nav-hamburger.open span:nth-child(1) { top: 15px; transform: rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { top: 15px; transform: rotate(-45deg); }

.nav-mobile-panel {
  display: none;
  position: fixed; left: 0; right: 0; z-index: 99;
  background: rgba(26,26,46,0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(202,138,4,0.25);
  flex-direction: column;
  padding: 8px 20px 20px;
  opacity: 0; transform: translateY(-8px);
  transition: opacity 0.22s ease, transform 0.22s ease;
}
.nav-mobile-panel.open { display: flex; opacity: 1; transform: translateY(0); }
.nav-mobile-panel a.nav-mobile-link {
  display: flex; align-items: center;
  min-height: 44px; padding: 0 4px;
  font-size: 15px; color: var(--text-cream);
  text-decoration: none;
  border-bottom: 1px solid rgba(248,244,239,0.08);
}
.nav-mobile-panel a.nav-mobile-link:active { color: var(--gold-light); }
.nav-mobile-panel .lang-switch { margin: 14px 4px; align-self: flex-start; }
.nav-mobile-panel .nav-login { margin: 4px 4px 6px; justify-content: center; min-height: 44px; }

@media (max-width: 1300px) {
  .nav-links { display: none; }
  .nav-right .nav-login, .nav-right .lang-switch { display: none; }
  .nav-hamburger { display: block; }
}

@media (max-width: 460px) {
  nav { padding: 14px 20px; }
  .nav-right .nav-cta { display: none; }
}
nav .nav-mobile-panel .nav-cta {
  display: none;
  margin: 14px 4px 4px; width: calc(100% - 8px);
}
@media (max-width: 460px) {
  nav .nav-mobile-panel .nav-cta { display: block; }
}