/* ═══════════════════════════════
   NADIA GARCÍA — Navigation
   ═══════════════════════════════ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.5rem 5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), padding var(--transition), backdrop-filter var(--transition), border-color var(--transition);
}
.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 1rem 5rem;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-img {
  height: 52px;
  width: auto;
  display: block;
  transition: opacity var(--transition);
}
/* Invert logo in light mode so it stays visible */
[data-theme="light"] .nav-logo-img {
  filter: invert(1) brightness(0.1);
}
.nav-logo:hover .nav-logo-img { opacity: 0.75; }

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}
.nav-links a {
  font-size: var(--fs-label);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-mid);
  text-decoration: none;
  font-weight: 400;
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--ink); }

/* ── Controls group (lang + theme) ── */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Language toggle */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-sm);
  overflow: hidden;
  height: 30px;
}
.lang-btn {
  padding: 0 0.7rem;
  height: 100%;
  background: transparent;
  border: none;
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: var(--font-display);
  font-weight: 400;
  color: var(--ink-mid);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.lang-btn.active {
  background: var(--g1);
  color: white;
  font-weight: 600;
}
.lang-btn:not(.active):hover { background: var(--border); color: var(--ink); }

/* Theme toggle */
.theme-toggle {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-mid);
  background: transparent;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  color: var(--ink-mid);
  padding: 0;
}
.theme-toggle:hover { border-color: var(--purple); color: var(--ink); background: var(--border); }
.theme-toggle svg { width: 14px; height: 14px; stroke: currentColor; fill: none; stroke-width: 1.5; }

/* Hamburger (mobile) */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 1px;
  background: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* Responsive */
@media (max-width: 920px) {
  .nav, .nav.scrolled { padding: 1.25rem 2rem; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 65px; left: 0; right: 0;
    background: var(--nav-mobile-bg);
    backdrop-filter: blur(20px);
    padding: 2rem;
    gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.mobile-open .nav-controls {
    display: flex;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }
}
@media (min-width: 921px) {
  /* On desktop, controls live in nav row, not inside nav-links */
  .nav-links .nav-controls { display: none; }
}

/* Desktop-only controls strip */
.nav > .nav-controls {
  display: flex;
}
@media (max-width: 920px) {
  .nav > .nav-controls { display: none; }
  /* Show inside mobile menu */
  .nav-links li.nav-controls { display: flex; }
}
@media (min-width: 921px) {
  /* Hide the li.nav-controls inside desktop nav-links */
  .nav-links li.nav-controls { display: none; }
}