/* Header y navegación — Siderum */

:root {
  --header-height: 76px;
}

@media (min-width: 1200px) {
  :root {
    --header-height: 96px;
  }
}

html {
  scroll-padding-top: var(--header-height);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  /* Mobile/Tablet: fondo sólido siempre (navegacion.txt §2, responsive.txt §4) */
  background-color: var(--color-gray-dark);
}

@media (min-width: 1200px) {
  .site-header {
    /* Desktop: transparente para integrarse con el Hero en la parte superior */
    background-color: transparent;
  }

  .site-header.is-scrolled {
    background-color: var(--color-gray-dark);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-height);
}

.logo {
  display: inline-flex;
  flex-shrink: 0;
}

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

@media (min-width: 1200px) {
  .logo img {
    height: 52px;
  }
}

/* Navegación Desktop */

.main-nav {
  display: none;
}

@media (min-width: 1200px) {
  .main-nav {
    display: block;
  }

  .main-nav > ul {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .main-nav > ul > li {
    position: relative;
    display: flex;
    align-items: center;
  }

  .main-nav > ul > li:not(:last-child)::after {
    content: "";
    width: clamp(1.25rem, 2vw, 2rem);
    height: 3px;
    flex-shrink: 0;
    background-color: var(--color-white);
  }
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  border: 2px solid var(--color-white);
  border-radius: 999px;
  padding: 0.65em 1.5em;
  background-color: transparent;
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: 0.95rem;
  line-height: 1.2;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
}

.nav-pill.is-current,
a.nav-pill:hover,
button.nav-pill:hover,
.nav-pill:focus-visible {
  background-color: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-turquoise-dark);
  text-decoration: none;
}

.nav-pill.nav-pill-cta {
  background-color: var(--color-turquoise);
  border-color: var(--color-white);
  color: var(--color-white);
}

.nav-caret {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid currentColor;
  flex-shrink: 0;
}

.nav-dropdown-toggle[aria-expanded="true"] .nav-caret,
.mobile-dropdown-toggle[aria-expanded="true"] .nav-caret {
  transform: rotate(180deg);
}

/* Submenú Aplicaciones (Desktop) */

.nav-dropdown {
  position: relative;
}

.submenu {
  display: block;
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  z-index: 20;
  min-width: 240px;
  list-style: none;
  margin: 0;
  padding: 1.1rem 1.4rem;
  border: 1.5px solid var(--color-white);
  border-radius: 20px;
  background-color: rgba(27, 54, 66, 0.94);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}

.nav-dropdown:hover .submenu,
.nav-dropdown:focus-within .submenu,
.nav-dropdown.is-open .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.submenu li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.25);
}

.submenu li:last-child {
  border-bottom: none;
}

.submenu a {
  display: block;
  padding: 0.6rem 0;
  color: var(--color-white);
  font-size: 0.95rem;
}

/* Botón hamburguesa y navegación Mobile/Tablet */

.menu-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

@media (min-width: 1200px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle-bar {
  display: block;
  width: 26px;
  height: 3px;
  border-radius: 999px;
  background-color: var(--color-white);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav {
  max-height: 0;
  overflow: hidden;
  visibility: hidden;
  background-color: var(--color-gray-dark);
  transition: max-height 0.25s ease;
}

@media (min-width: 1200px) {
  .mobile-nav {
    display: none;
  }
}

.mobile-nav.is-open {
  max-height: 640px;
  visibility: visible;
}

.mobile-nav > ul {
  list-style: none;
  margin: 0;
  padding: 0.25rem var(--container-padding) 1.5rem;
  display: flex;
  flex-direction: column;
}

.mobile-nav > ul > li {
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.mobile-nav > ul > li:last-child {
  border-bottom: none;
}

.mobile-nav a,
.mobile-dropdown-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  background: none;
  padding: 0.9rem 0;
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: var(--fw-regular);
  font-size: 1rem;
  text-align: left;
  cursor: pointer;
}

.mobile-nav > ul > li > a,
.mobile-dropdown-toggle {
  text-transform: uppercase;
}

.mobile-submenu {
  list-style: none;
  margin: 0;
  padding: 0 0 0.25rem 1rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
}

.mobile-nav-dropdown.is-open .mobile-submenu {
  max-height: 300px;
}

.mobile-submenu a {
  padding: 0.6rem 0;
  font-size: 0.95rem;
  text-transform: none;
}