/* ============================================================
   Nav component: fixed header, desktop menu, mobile drawer.
   Behavior lives in js/components/nav.js.
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem var(--pad-x);
  background: transparent;
  transition: background 0.35s var(--ease), padding 0.35s var(--ease);
}
.nav.is-scrolled {
  background: rgba(20, 20, 20, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  padding: 0.75rem var(--pad-x);
}

.nav__logo {
  display: flex;
  align-items: center;
  color: var(--white);
  transition: opacity 0.2s var(--ease);
}
.nav__logo:hover {
  opacity: 0.85;
}
.nav__logo img {
  height: 1.625rem;
  width: auto;
  display: block;
  transition: height 0.35s var(--ease);
}
.nav.is-scrolled .nav__logo img {
  height: 1.375rem;
}

.nav__menu {
  display: flex;
  gap: 2.25rem;
  align-items: center;
}
.nav__link {
  color: var(--white);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color 0.2s var(--ease);
  position: relative;
}
.nav__link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.375rem;
  height: 2px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav__link:hover {
  color: var(--green);
}
.nav__link:hover::after {
  transform: scaleX(1);
}
.nav__link.is-active {
  color: var(--green);
}
.nav__link.is-active::after {
  transform: scaleX(1);
}

.nav__side {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav__lang {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  color: #888;
  font-size: 0.8125rem;
  font-weight: 500;
}
.nav__lang .is-active {
  color: var(--green);
}
/* Language switcher hidden until the English version is ready.
   Remove this rule to enable it. */
.nav__lang,
.nav__drawer-lang {
  display: none !important;
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--white);
  border: 1.5px solid var(--green);
  padding: 0.625rem 1.125rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.875rem;
  transition: all 0.25s var(--ease);
}
.nav__cta:hover {
  background: var(--green);
  color: var(--black);
}
.nav__cta::after {
  content: '\2192';
  transition: transform 0.25s var(--ease);
}
.nav__cta:hover::after {
  transform: translateX(3px);
}

/* Light variant (empresa): editorial off-white page, dark text/logo
   instead of white, blue accent instead of green links. Set via
   $headerClass = 'nav--light' before including header.php. Uses the
   compound .nav.nav--light selector throughout so it reliably overrides
   the base rules regardless of source order. */
.nav.nav--light.is-scrolled {
  background: rgba(251, 251, 247, 0.92);
  border-bottom: 1px solid rgba(20, 20, 20, 0.08);
}
.nav.nav--light .nav__logo img {
  filter: invert(1);
}
.nav.nav--light .nav__link {
  color: var(--black);
}
.nav.nav--light .nav__link::after {
  background: var(--blue);
}
.nav.nav--light .nav__link:hover {
  color: var(--blue);
}
.nav.nav--light .nav__link.is-active {
  color: var(--blue);
}
.nav.nav--light .nav__lang .is-active {
  color: var(--blue);
}
.nav.nav--light .nav__cta {
  color: var(--black);
  border-color: var(--black);
}
.nav.nav--light .nav__cta:hover {
  background: var(--black);
  color: var(--green);
}
.nav.nav--light .nav__burger span {
  background: var(--black);
}

/* ===== Mobile drawer ===== */
.nav__burger {
  display: none;
  position: relative;
  width: 2rem;
  height: 1.5rem;
  padding: 0;
  background: 0;
  border: 0;
  cursor: pointer;
  z-index: 120;
  -webkit-tap-highlight-color: transparent;
}
.nav__burger span {
  position: absolute;
  left: 0.25rem;
  width: 1.5rem;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.5s cubic-bezier(0.66, 0, 0.2, 1);
}
.nav__burger span:nth-child(1) {
  top: 0.3125rem;
}
.nav__burger span:nth-child(2) {
  top: 0.6875rem;
}
.nav__burger span:nth-child(3) {
  top: 1.0625rem;
}
.nav.is-open .nav__burger span:nth-child(1) {
  top: 0.375rem;
  left: 0.125rem;
  width: 0.8125rem;
  transform: rotate(-45deg);
}
.nav.is-open .nav__burger span:nth-child(3) {
  top: 1rem;
  left: 0.125rem;
  width: 0.8125rem;
  transform: rotate(45deg);
}
.nav__menu-links {
  display: contents;
}
.nav__scrim,
.nav__drawer-lang,
.nav__drawer-cta {
  display: none;
}

@media (max-width: 820px) {
  /* Nav bar stays solid on mobile, no transparent state. */
  .nav {
    background: var(--black);
    padding: 0.875rem var(--pad-x);
  }
  .nav.is-scrolled {
    background: var(--black);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    padding: 0.875rem var(--pad-x);
  }
  .nav__logo img,
  .nav.is-scrolled .nav__logo img {
    height: 1.5rem;
  }
  .nav__burger {
    display: block;
  }
  .nav__side .nav__lang,
  .nav__side .nav__cta {
    display: none;
  }
  .nav__scrim {
    display: block;
    position: fixed;
    top: 3.1875rem;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--ease);
    z-index: 80;
  }
  .nav.is-open .nav__scrim {
    opacity: 1;
    pointer-events: auto;
  }
  .nav__menu {
    display: flex;
    flex-direction: column;
    gap: 0;
    align-items: stretch;
    position: fixed;
    top: 3.1875rem;
    right: 0;
    bottom: 0;
    left: auto;
    width: min(86vw, 23.75rem);
    padding: 1.5rem 1.875rem 1.75rem;
    background: var(--black);
    transform: translateX(100%);
    transition: transform 0.5s cubic-bezier(0.66, 0, 0.2, 1), visibility 0s 0.5s;
    visibility: hidden;
    z-index: 90;
  }
  .nav.is-open .nav__menu {
    transform: translateX(0);
    visibility: visible;
    transition: transform 0.5s cubic-bezier(0.66, 0, 0.2, 1), visibility 0s 0s;
    box-shadow: -1.5rem 0 3.75rem rgba(0, 0, 0, 0.35);
  }
  .nav__logo,
  .nav__side {
    position: relative;
    z-index: 100;
  }
  .nav__menu-links {
    display: flex;
    flex-direction: column;
    flex: 1;
    justify-content: center;
    align-items: center;
    gap: 1.375rem;
  }
  .nav__menu .nav__link {
    font-size: 1.25rem;
    font-weight: 500;
    padding: 0;
    width: auto;
    text-align: center;
    opacity: 0;
    transform: translateY(0.625rem);
    transition: opacity 0.4s var(--ease), transform 0.45s cubic-bezier(0.66, 0, 0.2, 1), color 0.2s var(--ease);
  }
  .nav__menu .nav__link::after {
    display: none;
  }
  .nav__menu .nav__link.is-active {
    color: var(--green);
  }
  .nav.is-open .nav__menu-links .nav__link {
    opacity: 1;
    transform: translateY(0);
  }
  .nav.is-open .nav__menu-links .nav__link:nth-child(1) { transition-delay: 0.08s; }
  .nav.is-open .nav__menu-links .nav__link:nth-child(2) { transition-delay: 0.14s; }
  .nav.is-open .nav__menu-links .nav__link:nth-child(3) { transition-delay: 0.2s; }
  .nav.is-open .nav__menu-links .nav__link:nth-child(4) { transition-delay: 0.26s; }
  .nav.is-open .nav__menu-links .nav__link:nth-child(5) { transition-delay: 0.32s; }
  .nav__drawer-lang {
    display: block;
    text-align: center;
    color: #8a8a84;
    font-size: 0.875rem;
    font-weight: 500;
    padding-bottom: 1rem;
    opacity: 0;
    transition: opacity 0.4s var(--ease) 0.34s;
  }
  .nav__drawer-lang .is-active {
    color: var(--green);
  }
  .nav.is-open .nav__drawer-lang {
    opacity: 1;
  }
  .nav__drawer-cta {
    display: block;
    text-align: center;
    text-decoration: none;
    background: var(--green);
    color: var(--black);
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: 999px;
    padding: 0.875rem 0;
    opacity: 0;
    transition: opacity 0.4s var(--ease) 0.4s;
  }
  .nav.is-open .nav__drawer-cta {
    opacity: 1;
  }

  /* Light variant (empresa): always solid paper background on mobile,
     never transparent (matches the dated request already applied to
     the dark variant's own always-solid-on-mobile rule above). */
  .nav.nav--light,
  .nav.nav--light.is-scrolled {
    background: var(--paper);
    border-bottom: 1px solid rgba(20, 20, 20, 0.08);
  }
  .nav.nav--light .nav__menu {
    background: var(--paper);
  }
  .nav.nav--light .nav__menu .nav__link.is-active {
    color: var(--blue);
  }
  .nav.nav--light .nav__drawer-lang .is-active {
    color: var(--blue);
  }
  .nav.nav--light .nav__drawer-cta {
    background: var(--blue);
    color: var(--white);
  }
}