/* ===== NAVBAR OVIQA — WCAG 2.2 + Dark/Light + Priority+ ===== */

/* Compensación global del header fijo */
body {
  padding-top: calc(var(--nav-h) + 0.5rem);
}

/* Anclas (#diagnostico, etc.) con margen bajo el header */
.hero,
.section {
  scroll-margin-top: calc(var(--nav-h) + 0.5rem);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--c-bg);
  color: var(--c-text);
  border-bottom: 1px solid var(--c-divider);
  height: var(--nav-h);
  will-change: transform;
  transition: transform 0.24s ease, box-shadow 0.24s ease,
    background-color 0.24s ease;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.site-header:focus-within {
  transform: none !important;
}

.site-header.hide {
  transform: none;
}

/* Layout principal: IZQ (marca) — CENTRO (nav) — DER (CTAs) */
.nav {
  width: 100%;
  max-width: 100%;
  margin-inline: 0;
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--gap);
  padding: 0.45rem clamp(1rem, 3vw, 2.5rem);
  position: relative;
}

/* BLOQUE IZQUIERDA + CENTRO */
.nav-main {
  flex: 1 1 auto;
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  column-gap: var(--gap);
}

.brand {
  grid-column: 1;
  display: flex;
  align-items: center;
  line-height: 1;
  min-height: 48px;
  padding: 0.55rem 0.25rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.9rem;
  position: relative;
}

.brand::before {
  content: "";
  position: absolute;
  inset: auto 0 -0.05rem 0;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, #0a66ff, #22c55e);
  opacity: 0;
  transform: scaleX(0.4);
  transform-origin: left;
  transition: opacity 0.22s ease-out, transform 0.22s ease-out;
}

.brand:hover::before {
  opacity: 1;
  transform: scaleX(1);
}

/* Menú principal centrado */
.nav-list {
  grid-column: 2;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.5rem;
  padding: 0.55rem 0.95rem;
  border-radius: var(--radius-sm, 0.6rem);
  line-height: 1.1;
  white-space: nowrap;
  position: relative;
}

a[aria-current="page"] {
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

.nav-list a:hover {
  background: var(--c-primary-soft);
  color: var(--c-primary);
}

/* BLOQUE DERECHA */
.nav-cta {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

/* Botón del tema */
.theme-button {
  display: inline-grid;
  grid-auto-flow: column;
  align-items: center;
  gap: 0.5rem;
}
.theme-button .icon {
  inline-size: 1.1rem;
  display: inline-block;
}

/* Priority+ */
.more-btn {
  display: none;
}

.overflow-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  z-index: 1110;
  background: var(--menu-bg);
  color: var(--menu-text);
  border: 1px solid var(--menu-border);
  border-radius: 0.6rem;
  box-shadow: var(--menu-shadow);
  padding: 0.25rem;
  margin: 0;
  list-style: none;
  min-inline-size: 220px;
}

.overflow-menu[hidden] {
  display: none !important;
}

.overflow-menu a {
  display: block;
  padding: 0.55rem 0.95rem;
  border-radius: 0.5rem;
  white-space: nowrap;
}

.overflow-menu a:hover {
  background: var(--c-primary-soft);
  color: var(--c-primary);
}

/* Popup del tema (APG: menu) */
.menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  z-index: 1100;
  background: var(--menu-bg);
  color: var(--menu-text);
  border: 1px solid var(--menu-border);
  border-radius: 0.6rem;
  box-shadow: var(--menu-shadow);
  padding: 0.25rem;
  margin: 0;
  list-style: none;
  min-inline-size: 220px;
}

.menu[hidden] {
  display: none !important;
}

.menu [role="menuitemradio"] {
  width: 100%;
  text-align: left;
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
  border-radius: 0.5rem;
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 0.55rem 0.95rem;
}

.menu [role="menuitemradio"][aria-checked="true"] {
  background: rgba(10, 102, 255, 0.1);
}

.menu [role="menuitemradio"]:hover {
  background: var(--c-primary-soft);
  color: var(--c-primary);
}

/* MÓVIL */
.bottom-bar {
  display: none;
}

@media (max-width: 768px) {
  .site-header {
    position: static;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  body {
    padding-top: 0;
  }

  .hero,
  .section {
    scroll-margin-top: 0.75rem;
  }

  .nav-main {
    gap: 0.75rem;
  }

  .nav-list {
    justify-content: flex-start;
  }

  .nav-cta {
    display: flex;
    gap: 0.35rem;
    align-items: center;
  }

  .nav-cta .btn,
  .nav-cta a.btn {
    display: none;
  }

  #theme-button {
    display: inline-grid;
  }

  .bottom-bar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    gap: 0.5rem;
    padding: 0.5rem 0.5rem;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom, 0px));
    background: var(--c-bg);
    color: var(--c-text);
    border-top: 1px solid var(--c-divider);

    /* CLAVE: asegurar que la barra quede por ENCIMA del hero (stacking contexts) */
    z-index: 2000;
  }

  .bb-item {
    flex: 1;
    border: 1px solid var(--c-border);
    border-radius: 0.75rem;
    justify-content: center;
    min-height: 48px;
    display: flex;
    align-items: center;
    padding: 0.55rem 0.95rem;
  }

  .bb-primary {
    background: var(--c-primary);
    color: #fff;
    border-color: var(--c-primary);
  }

  body {
    padding-bottom: var(--bb-h);
  }
}

/* Tablet: scroll horizontal real solo en el menú */
@media (max-width: 960px) {
  .nav-list {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x proximity;
    gap: 0.35rem;
    padding-bottom: 0;
    flex-wrap: nowrap;
    touch-action: pan-x;
  }
  .nav-list > li {
    flex: 0 0 auto;
  }
  .nav-list a {
    scroll-snap-align: center;
  }
  .nav-list::-webkit-scrollbar {
    display: none;
  }
  .nav-list {
    scrollbar-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header {
    transition: none;
  }
}

/* Modo oscuro: hovers visibles en navbar/menus */
[data-theme="dark"] .nav-list a:hover {
  background: rgba(15, 23, 42, 0.9);
  color: #bfdbfe;
}

[data-theme="dark"] .overflow-menu a:hover,
[data-theme="dark"] .menu [role="menuitemradio"]:hover {
  background: rgba(15, 23, 42, 0.9);
  color: #e5e7eb;
}

@media (max-width: 768px) {
  [data-theme="dark"] .bottom-bar {
    background: rgba(15, 23, 42, 0.98);
    border-top-color: #111827;
  }

  [data-theme="dark"] .bb-item {
    border-color: #4b5563;
    background: #020617;
    color: #e5e7eb;
  }

  [data-theme="dark"] .bb-item:hover {
    background: #111827;
    border-color: #e5e7eb;
  }

  [data-theme="dark"] .bb-primary {
    background: #0a66ff;
    border-color: #1d4ed8;
    color: #f9fafb;
  }

  [data-theme="dark"] .bb-primary:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.5);
  }
}