/* ============================================================
   SÉCULO EXPLORER — Navigation
   ============================================================ */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-primary);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.12);
  transition: box-shadow 0.3s ease;
}

.site-nav.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Logo ── */
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-logo img {
  height: 36px;
  width: auto;
}

.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.02em;
}

.nav-logo-text span {
  color: var(--color-accent);
}

/* ── Nav Links ── */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: color var(--transition);
  padding: 4px 0;
}

.nav-links a:not(.btn):hover {
  color: var(--color-accent);
}

.nav-links .btn {
  padding: 10px 20px;
  font-size: 0.88rem;
}

.nav-links .btn-outline {
  color: var(--color-white);
}

.nav-links .btn-outline:hover {
  color: var(--color-primary);
}

/* ── Language Toggle ── */
.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 16px;
}

.lang-btn {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-body);
  font-size: 0.8rem;
  cursor: pointer;
  letter-spacing: 0.05em;
  padding: 2px 4px;
  transition: var(--transition);
  line-height: 1;
}

.lang-btn.active,
.lang-btn:hover {
  color: var(--color-accent);
  font-weight: 600;
}

.lang-toggle span {
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.8rem;
  user-select: none;
}

/* ── Hamburger ── */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: 12px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

/* Hamburger open animation */
.site-nav.is-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-nav.is-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}

.site-nav.is-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile ── */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--color-primary);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav.is-open .nav-links {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    width: 100%;
  }

  .nav-links .btn {
    width: 100%;
    justify-content: center;
  }

  .lang-toggle {
    margin-left: 0;
    margin-top: 8px;
  }

  .nav-inner {
    position: relative;
  }
}

@media (max-width: 480px) {
  .nav-inner {
    padding: 0 16px;
  }
}