/* ═══════════════════════════════════════════════════
   HEADER — Navegación principal y menú móvil
═══════════════════════════════════════════════════ */

/* ── Header ── */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  padding: 1.1rem 0;
  transition: background var(--tr), border-color var(--tr), padding var(--tr), backdrop-filter var(--tr);
  border-bottom: 1px solid transparent;
}
header.scrolled {
  background: rgba(6, 7, 10, .94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--c-border);
  padding: .75rem 0;
}

/* ── Nav layout ── */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* ── Logo imagen ── */
.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.logo-img {
  height: 58px;
  width: auto;
  max-width: 220px;
  display: block;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: .92;
  transition: opacity var(--tr), transform var(--tr);
}
.logo:hover .logo-img {
  opacity: 1;
  transform: scale(1.04);
}
/* Fallback (logo-mark + logo-text) — se oculta si la imagen carga */
.logo-mark { display: none; }
.logo-text { display: none; }

/* ── Desktop nav links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  font-size: .84rem;
  font-weight: 500;
  color: var(--c-muted2);
  letter-spacing: .04em;
  transition: color var(--tr);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -.3rem; left: 0; right: 0;
  height: 1px;
  background: var(--c-gold);
  transform: scaleX(0);
  transition: transform var(--tr);
}
.nav-links a:hover       { color: var(--c-white); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ── CTA desktop ── */
.nav-cta {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

/* ── Hamburger ── */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .35rem;
  flex-direction: column;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: all var(--tr);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile menu overlay ── */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  background: rgba(6, 7, 10, .98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--tr), visibility var(--tr);
}
.mobile-menu.open { opacity: 1; visibility: visible; }

.mobile-menu a {
  font-family: var(--f-serif);
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  font-weight: 300;
  color: var(--c-muted2);
  transition: color var(--tr);
}
.mobile-menu a:hover { color: var(--c-gold); }

.mobile-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  background: rgba(255, 255, 255, .07);
  border: 1px solid var(--c-border);
  color: var(--c-muted2);
  width: 44px; height: 44px;
  border-radius: 50%;
  font-size: 1.1rem;
  cursor: pointer;
  display: grid; place-items: center;
  transition: all var(--tr);
}
.mobile-close:hover { color: var(--c-white); border-color: var(--c-border-h); background: rgba(255,255,255,.12); }

.mobile-divider {
  width: 40px; height: 1px;
  background: var(--c-border);
}

.mobile-cta { margin-top: 1rem; }