/* ==========================================================================
   DEPUBAC — Navegación
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: saturate(1.5) blur(12px);
  -webkit-backdrop-filter: saturate(1.5) blur(12px);
  border-bottom: 1px solid var(--color-slate-200);
  z-index: 100;
  transition: box-shadow var(--t-base);
}

.site-header.is-scrolled { box-shadow: var(--shadow-sm); }

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-6);
  gap: var(--sp-6);
}

.site-nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-nav__logo img {
  height: 68px;
  width: auto;
}

.site-nav__menu-wrap {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
  margin-left: auto;
}

.site-nav__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: nowrap;
}

.site-nav__menu li { margin: 0; }

.site-nav__link {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: var(--fw-medium);
  color: var(--color-slate-700);
  text-decoration: none;
  padding: var(--sp-2) 0;
  position: relative;
  transition: color var(--t-fast);
  white-space: nowrap;
}

.site-nav__link:hover { color: var(--color-ink); }
.site-nav__link.is-active { color: var(--color-ink); }
.site-nav__link.is-active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--color-blue);
}

.site-nav__cta {
  display: inline-flex;
  align-items: center;
  padding: var(--sp-3) var(--sp-4);
  background: var(--color-ink);
  color: var(--color-white);
  font-size: 0.9375rem;
  font-weight: var(--fw-medium);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--t-base);
  white-space: nowrap;
  flex-shrink: 0;
}

.site-nav__cta:hover {
  background: var(--color-bio);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* Toggle móvil */
.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--sp-2);
  width: 44px;
  height: 44px;
}

.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-ink);
  margin: 5px auto;
  transition: transform var(--t-base), opacity var(--t-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Pantallas medianas → nav más compacto */
@media (max-width: 1180px) {
  .site-nav__menu { gap: var(--sp-5); }
  .site-nav__link { font-size: 0.875rem; }
  .site-nav__menu-wrap { gap: var(--sp-6); }
}

/* Móvil */
@media (max-width: 1024px) {
  .nav-toggle { display: block; }

  .site-nav__menu-wrap {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-slate-200);
    padding: var(--sp-6);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--t-base), opacity var(--t-base), visibility var(--t-base);
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__menu-wrap.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .site-nav__menu {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    width: 100%;
  }

  .site-nav__menu li {
    width: 100%;
    border-bottom: 1px solid var(--color-slate-200);
  }

  .site-nav__link {
    display: block;
    padding: var(--sp-4) 0;
    font-size: var(--fs-md);
    width: 100%;
  }

  .site-nav__link.is-active::after { display: none; }

  .site-nav__cta {
    display: block;
    text-align: center;
    margin-top: var(--sp-6);
    padding: var(--sp-4);
  }
}