/* ============================================================
   NAV — Header fixo + drawer mobile + language switcher
   ============================================================ */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(5, 5, 5, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--t);
}

.site-nav__inner {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
}

.site-nav__brand {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  text-decoration: none;
}
.site-nav__brand img {
  height: 28px;
  width: auto;
  filter: brightness(0) invert(1);
}
.site-nav__brand-name {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: var(--fw-black);
  color: var(--text);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

.site-nav__menu {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.site-nav__link {
  color: var(--text-muted);
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  padding: 0.5em 0;
  position: relative;
  transition: color var(--t);
}
.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--gold);
}
.site-nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0; right: 0;
  height: 2px;
  background: var(--gold);
}

/* Language switcher */
.lang-switch {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  overflow: hidden;
}
.lang-switch__btn {
  padding: 0.4em 0.75em;
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: var(--fw-bold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--text-muted);
  border: 0;
  cursor: pointer;
  transition: all var(--t);
  text-decoration: none;
  display: inline-block;
}
.lang-switch__btn:hover {
  color: var(--text);
  background: var(--bg-3);
}
.lang-switch__btn[aria-current="true"] {
  background: var(--gold);
  color: var(--bg);
}

/* Mobile drawer button */
.site-nav__toggle {
  display: none;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}
.site-nav__toggle-line {
  width: 18px; height: 2px;
  background: var(--text);
  position: relative;
  transition: transform var(--t);
}
.site-nav__toggle-line::before,
.site-nav__toggle-line::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--text);
  transition: transform var(--t);
}
.site-nav__toggle-line::before { top: -6px; }
.site-nav__toggle-line::after  { top:  6px; }

/* Mobile drawer */
@media (max-width: 880px) {
  .site-nav { height: var(--nav-h-mobile); }
  .site-nav__menu {
    position: fixed;
    top: var(--nav-h-mobile);
    left: 0; right: 0;
    bottom: 0;
    flex-direction: column;
    gap: var(--sp-4);
    padding: var(--sp-7) var(--gutter);
    background: var(--bg);
    border-top: 1px solid var(--border);
    transform: translateX(100%);
    transition: transform var(--t-slow);
  }
  .site-nav[data-open="true"] .site-nav__menu {
    transform: translateX(0);
  }
  .site-nav__link {
    font-size: 1.125rem;
    padding: var(--sp-3) 0;
    border-bottom: 1px solid var(--border);
    display: block;
    width: 100%;
  }
  .site-nav__toggle {
    display: inline-flex;
    order: 3;
  }
  .lang-switch {
    margin-top: var(--sp-5);
    align-self: flex-start;
  }
  .site-nav__brand-name {
    display: none;
  }
}

/* Adiciona padding ao body para evitar overlap com o nav fixo */
body { padding-top: var(--nav-h); }

@media (max-width: 880px) {
  body { padding-top: var(--nav-h-mobile); }
}