/* --------------------------------------------------------------------------
   Barra de navegación (cabecera, topbar, offcanvas móvil y buscador)
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.25s ease;
}

.site-header.is-scrolled { box-shadow: 0 1px 0 var(--ink-900); }

/* Franja superior: logo institucional + etiqueta de la facultad */
.topbar {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.topbar-logo { display: inline-flex; }

.topbar-logo img {
  display: block;
  height: 40px;
  width: auto;
}

@media (max-width: 575.98px) {
  .topbar-logo img { height: 32px; }
}

.topbar-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Utility nav del topbar (estructura del theme dependency) */
.utility-nav {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.utility-nav a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color 0.2s ease;
}

.utility-nav a:hover, .utility-nav a:focus-visible { color: var(--color-text); }

.utility-nav svg { flex: 0 0 auto; }

.utility-nav-mobile { flex-wrap: wrap; gap: 0.5rem 1.25rem; }

.utility-nav-mobile a { font-size: 0.9rem; padding: 0.55rem 0; }

/* Botón de la lupa */
.search-toggle {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.search-toggle:hover { opacity: 0.6; }

.search-toggle svg { width: 20px; height: 20px; }

/* Panel de búsqueda (offcanvas superior) */
.search-panel {
  --bs-offcanvas-height: auto;
  border-bottom: 2px solid var(--ink-900);
}

.search-panel .offcanvas-header { border-bottom: 1px solid var(--color-border); }

.search-panel .offcanvas-body { padding-block: 1.75rem 2.25rem; }

.search-inner {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 2px solid var(--ink-900);
}

.search-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  font-family: var(--font-body);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--color-text);
  padding: 0.5rem 0;
}

.search-input:focus { outline: none; }

/* Foco de teclado visible para el campo de búsqueda */
.search-input:focus-visible {
  outline: 3px solid var(--ink-900);
  outline-offset: 2px;
}

.search-input::placeholder { color: var(--ink-300); }

.search-submit {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.search-submit:hover { opacity: 0.6; }

.search-submit svg { width: 24px; height: 24px; }

.search-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  margin-top: 1.1rem;
}

.search-radio { display: flex; align-items: center; gap: 0.5rem; }

.search-radio input[type="radio"] {
  appearance: none;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border: 2px solid var(--ink-900);
  border-radius: 50%;
  background: var(--color-bg);
  cursor: pointer;
  display: grid;
  place-items: center;
}

.search-radio input[type="radio"]::after {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ink-900);
  transform: scale(0);
  transition: transform 0.15s ease;
}

.search-radio input[type="radio"]:checked::after { transform: scale(1); }

/* Radios personalizados: el appearance:none elimina el foco nativo */
.search-radio input[type="radio"]:focus-visible {
  outline: 3px solid var(--ink-900);
  outline-offset: 2px;
}

.search-radio label {
  font-size: 0.88rem;
  color: var(--color-text);
  cursor: pointer;
}

/* Buscador de Google CSE en la página de resultados (/search/google).
   Google inyecta su propio buscador (tabla con clases .gsc-*) con estilo
   por defecto; aquí lo acercamos al .search-input del tema. Requiere
   !important porque cse.js aplica estilos inline/propios muy específicos.
   Las clases .gsc-* solo aparecen en esta página, así que no hace falta
   acotarlas con un ancestro. */
.gsc-input-box {
  border: 0 !important;
  border-bottom: 2px solid var(--ink-900) !important;
  background: transparent !important;
  box-shadow: none !important;
  padding: 0 !important;
}

input.gsc-input,
.gsc-input-box input.gsc-input {
  font-family: var(--font-body) !important;
  font-size: 1.1rem !important;
  color: var(--color-text) !important;
  /* "none" quita el watermark que Google aplica como background inline */
  background: transparent none !important;
  border: 0 !important;
  padding: 0.4rem 0 !important;
  text-indent: 0 !important;
}

/* Fila del menú: solo enlaces, centrados */
.navbar { padding-block: 0; }

.navbar .nav-link {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--color-text);
  padding-inline: 0.85rem;
  padding-block: 1rem;
  position: relative;
}

.navbar .nav-link::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.55rem;
  height: 2px;
  background: var(--ink-900);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.navbar .nav-link:hover::after,
.navbar .nav-link:focus-visible::after,
.navbar .nav-link.active::after { transform: scaleX(1); }

.navbar .nav-link.active { font-weight: 700; }

.dropdown-menu {
  border-radius: 0;
  border: 1px solid var(--ink-900);
  box-shadow: 6px 6px 0 rgba(10, 10, 10, 0.08);
  padding: 0.4rem 0;
}

.dropdown-item {
  font-size: 0.86rem;
  padding: 0.55rem 1.1rem;
}

.dropdown-item:hover, .dropdown-item:focus {
  background: var(--ink-900);
  color: var(--ink-000);
}

.dropdown-header {
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.navbar-toggler {
  border: 1px solid var(--ink-900);
  border-radius: 0;
  padding: 0.45rem 0.6rem;
}

.navbar-toggler:focus { box-shadow: none; outline: 3px solid var(--ink-900); outline-offset: 2px; }

/* Offcanvas móvil */
.offcanvas {
  --bs-offcanvas-width: min(86vw, 360px);
  border-left: 1px solid var(--ink-900);
}

.offcanvas .nav-link {
  font-size: 1rem;
  font-weight: 600;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--color-border);
}

.offcanvas .list-unstyled a {
  display: block;
  padding: 0.45rem 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-decoration: none;
}

.offcanvas .list-unstyled a:hover { color: var(--color-text); }