/* ── Navigation / Header ── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-slow);
}

/* Transparent state (over hero) */
.site-header.transparent {
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Scrolled / solid state */
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(10, 31, 68, 0.08);
  box-shadow: 0 4px 24px rgba(10, 31, 68, 0.06);
}

.nav-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-8);
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

/* Logo image – header */
.nav-logo-img {
  height: 44px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity var(--transition-fast), filter var(--transition-fast);
  /* Aísla el logo del color de fondo para evitar tinte azulado */
  isolation: isolate;
  mix-blend-mode: normal;
}

.nav-logo-img:hover {
  opacity: 0.85;
}

/* Sobre el hero oscuro: resalta el logo con brillo limpio */
.site-header.transparent .nav-logo-img {
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.25));
}

/* Logo in mobile drawer */
.nav-logo-img--drawer {
  height: 40px;
}

/* Logo in footer (fondo navy oscuro) */
.nav-logo-img--footer {
  height: 48px;
  opacity: 0.9;
}

/* ── Nav Links ── */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  list-style: none;
}

.nav-menu li a {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-2) var(--sp-3);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--text-medium);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav-menu li a:hover,
.nav-menu li a.active {
  color: var(--color-primary);
  background: var(--bg-light);
}

.site-header.transparent .nav-menu li a {
  color: rgba(255, 255, 255, 0.8);
}

.site-header.transparent .nav-menu li a:hover,
.site-header.transparent .nav-menu li a.active {
  color: white;
  background: rgba(255, 255, 255, 0.12);
}

/* ── Nav CTA Button ── */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-2) var(--sp-5);
  background: var(--color-accent);
  color: white !important;
  font-size: var(--text-sm);
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  transition: background var(--transition-fast), transform var(--transition-spring), box-shadow var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  box-shadow: var(--shadow-accent);
}

.nav-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.45);
}

.nav-cta svg {
  width: 16px;
  height: 16px;
}

/* ── Mobile Hamburger ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-md);
  background: transparent;
  border: none;
  transition: background var(--transition-fast);
}

.nav-toggle:hover {
  background: var(--bg-subtle);
}

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

.site-header.transparent .nav-toggle span {
  background: white;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Mobile Nav Drawer ── */
.nav-mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 31, 68, 0.5);
  backdrop-filter: blur(4px);
  z-index: calc(var(--z-nav) - 1);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.nav-mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.nav-mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100%;
  background: white;
  z-index: var(--z-nav);
  box-shadow: var(--shadow-2xl);
  transition: right var(--transition-slow);
  overflow-y: auto;
  padding: var(--sp-6);
}

.nav-mobile-drawer.open {
  right: 0;
}

.nav-mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-8);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--bg-subtle);
}

.nav-mobile-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light);
  cursor: pointer;
  border: none;
  font-size: 1.25rem;
  color: var(--text-medium);
  transition: background var(--transition-fast);
}

.nav-mobile-close:hover {
  background: var(--bg-subtle);
}

.nav-mobile-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
}

.nav-mobile-menu li a {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--text-base);
  font-weight: var(--fw-medium);
  color: var(--text-dark);
  border-radius: var(--radius-lg);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-mobile-menu li a:hover,
.nav-mobile-menu li a.active {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.nav-mobile-cta {
  margin-top: var(--sp-8);
  display: block;
  text-align: center;
  padding: var(--sp-4) var(--sp-6);
  background: var(--gradient-accent);
  color: white;
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-xl);
  transition: opacity var(--transition-fast);
}

.nav-mobile-cta:hover {
  opacity: 0.9;
}