/* =========================================================================
   Carpeta Estructural Semántica: nav_
   ========================================================================= */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
}

.nav.is-scrolled {
  background: rgba(7,8,9,0.82);
  backdrop-filter: blur(0.875rem);
  -webkit-backdrop-filter: blur(0.875rem);
  border-bottom-color: var(--c-hairline);
}

.nav_inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.375rem 2.5rem;
  transition: padding 0.3s ease;
}

.nav.is-scrolled .nav_inner {
  padding-top: 0.875rem;
  padding-bottom: 0.875rem;
}

/* ─── Wordmark ─── */
.nav_wordmark {
  display: flex;
  align-items: center;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.25rem;      /* 20px */
  letter-spacing: 0.06em;
  color: var(--c-ghost);
  background: none;
  border: none;
  padding: 0;
  text-transform: uppercase;
  cursor: pointer;
}

.nav_wordmark-accent {
  color: var(--c-celeste);
  margin-left: 0.35em;
}

/* ─── Desktop right group ─── */
.nav_right {
  display: flex;
  align-items: center;
  gap: 2.125rem;           /* 34px */
}

.nav_links {
  display: flex;
  align-items: center;
  gap: 2rem;               /* 32px */
}

.nav_link {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.875rem;     /* 14px */
  letter-spacing: 0.12em;
  color: var(--c-ghost-grey);
  padding: 0.375rem 0;
  transition: color 0.2s ease;
}

.nav_link:hover {
  color: var(--c-ghost);
}

/* ─── Hamburger ─── */
.nav_burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.625rem;         /* 42px */
  height: 2.625rem;
  background: none;
  border: 1px solid rgba(216,216,211,0.18);
  border-radius: var(--r-button);
  transition: border-color 0.2s ease;
}

.nav_burger:hover {
  border-color: rgba(216,216,211,0.4);
}

.nav_burger svg {
  width: 1.375rem;         /* 22px */
  height: 1.375rem;
  fill: none;
  stroke: var(--c-ghost);
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ─── Mobile overlay ─── */
.nav_mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: rgba(7,8,9,0.97);
  backdrop-filter: blur(0.5rem);
  -webkit-backdrop-filter: blur(0.5rem);
  display: flex;
  flex-direction: column;
  padding: 1.625rem 1.375rem;
}

.nav_mobile-overlay[hidden] {
  display: none;
}

.nav_mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav_mobile-close {
  width: 2.625rem;
  height: 2.625rem;
  background: none;
  border: 1px solid rgba(216,216,211,0.18);
  border-radius: var(--r-button);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.nav_mobile-close svg {
  width: 1.375rem;
  height: 1.375rem;
  fill: none;
  stroke: var(--c-ghost);
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav_mobile-links {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  margin-top: 2.875rem;   /* 46px */
}

.nav_mobile-link {
  text-align: left;
  background: none;
  border: none;
  border-bottom: 1px solid var(--c-hairline);
  cursor: pointer;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: 1.75rem;     /* 28px */
  letter-spacing: 0.02em;
  color: var(--c-ghost);
  text-transform: uppercase;
  padding: 1.125rem 0;
  transition: color 0.2s ease;
}

.nav_mobile-link:hover {
  color: var(--c-celeste);
}

.nav_mobile-cta {
  margin-top: 2.125rem;   /* 34px */
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Full-width CTAs inside the mobile/tablet menu */
.nav_mobile-cta .button {
  width: 100%;
}

/* ─── Language selector (desktop dropdown) ─── */
.lang {
  position: relative;
}

.lang_btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: none;
  border: 1px solid rgba(216,216,211,0.18);
  border-radius: var(--r-button);
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;      /* 13px */
  letter-spacing: 0.1em;
  color: var(--c-ghost-grey);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.lang_btn:hover,
.lang.is-open .lang_btn {
  color: var(--c-ghost);
  border-color: rgba(216,216,211,0.4);
}

.lang_globe {
  width: 1rem;
  height: 1rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
}

.lang_chev {
  width: 0.85rem;
  height: 0.85rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 0.2s ease;
}

.lang.is-open .lang_chev {
  transform: rotate(180deg);
}

.lang_current {
  min-width: 1.4em;
  text-align: left;
}

.lang_menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 11rem;
  background: rgba(12,13,15,0.98);
  backdrop-filter: blur(0.75rem);
  -webkit-backdrop-filter: blur(0.75rem);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-button);
  box-shadow: var(--shadow-bar);
  padding: 0.375rem;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.lang_menu[hidden] {
  display: none;
}

.lang_opt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem 0.6rem;
  border-radius: var(--r-button);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--c-ghost-grey);
  text-align: left;
  transition: background 0.15s ease, color 0.15s ease;
}

.lang_opt:hover {
  background: var(--c-celeste-hover);
  color: var(--c-ghost);
}

.lang_opt.is-active {
  color: var(--c-celeste);
}

.lang_opt-code {
  font-size: 0.6875rem;      /* 11px */
  letter-spacing: 0.12em;
  color: var(--c-atlantic-sky);
}

.lang_opt.is-active .lang_opt-code {
  color: var(--c-celeste);
}

/* ─── Language selector (mobile segmented) ─── */
.nav_mobile-lang {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.nav_mobile-lang-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-atlantic-sky);
}

.lang_seg {
  display: inline-flex;
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-button);
  overflow: hidden;
  width: 100%;
}

.lang_seg-btn {
  flex: 1;
  background: none;
  border: none;
  border-right: 1px solid var(--c-hairline);
  cursor: pointer;
  padding: 0.75rem 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  color: var(--c-ghost-grey);
  transition: background 0.15s ease, color 0.15s ease;
}

.lang_seg-btn:last-child {
  border-right: none;
}

.lang_seg-btn:hover {
  color: var(--c-ghost);
}

.lang_seg-btn.is-active {
  background: var(--c-celeste-ring);
  color: var(--c-celeste);
}

/* ─── Responsive ─── */
@media (max-width: 900px) {
  .nav_inner {
    padding: 1rem 1.375rem;
  }
  .nav.is-scrolled .nav_inner {
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
  }
  .nav_right {
    display: none;
  }
  .nav_burger {
    display: inline-flex;
  }
}