/* navbar.css — Barra de navegação fixa */

.navbar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  transition: background-color var(--transition), backdrop-filter var(--transition), box-shadow var(--transition), border-color var(--transition), top 0.35s var(--ease);
  border-bottom: 1px solid transparent;
}

.navbar--scrolled {
  background-color: rgba(13, 13, 13, 0.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 20px rgba(0,0,0,0.4);
}

[data-theme="light"] .navbar--scrolled {
  background-color: rgba(242, 239, 232, 0.88);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: 100%;
  max-width: var(--container-max);
}

/* === LOGO === */
.nav-logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo-wordmark {
  font-family: var(--font-sans);
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-1);
  line-height: 1;
}

.nav-logo-wordmark .k-accent {
  color: var(--accent);
}

.nav-logo-tagline {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-3);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.nav-logo-tagline .sep {
  color: var(--border-hover);
  font-weight: 300;
}

/* === LINKS DE NAVEGAÇÃO === */
.nav-links {
  display: none;
  align-items: center;
  gap: 4px;
}

.nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-2);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  text-decoration: none;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition);
}

.nav-link:hover { color: var(--text-1); }
.nav-link.active { color: var(--text-1); }
.nav-link.active::after { transform: scaleX(1); }

/* === AÇÕES DA NAVBAR === */
.nav-actions {
  display: none;
  align-items: center;
  gap: 8px;
}

/* === TOGGLE DE TEMA === */
.nav-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text-2);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
  flex-shrink: 0;
}

.nav-theme-toggle:hover {
  color: var(--text-1);
  border-color: var(--border-hover);
  background: var(--bg-surface);
}

.nav-theme-toggle svg { width: 16px; height: 16px; }
.icon-moon { display: block; }
.icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: block; }

/* === DROPDOWN DE IDIOMA === */
.lang-dropdown {
  position: relative;
}

.lang-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-2);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 5px 9px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.lang-dropdown-trigger:hover {
  color: var(--text-1);
  border-color: var(--border-hover);
  background: var(--bg-surface);
}

.lang-dropdown-trigger.open {
  border-color: var(--accent);
  color: var(--text-1);
  background: var(--bg-surface);
}

.lang-flag    { font-size: 1rem; line-height: 1; display: inline-block; }
.lang-code    { font-size: 0.7rem; font-weight: 700; letter-spacing: 0.04em; }

.lang-chevron {
  width: 11px;
  height: 11px;
  color: var(--text-3);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.lang-dropdown-trigger.open .lang-chevron { transform: rotate(180deg); }

/* Menu dropdown */
.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 7px);
  right: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  min-width: 148px;
  box-shadow: var(--shadow-lg);
  z-index: 1100;
  overflow: hidden;
  opacity: 0;
  transform: translateY(-6px) scale(0.97);
  pointer-events: none;
  transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
  transform-origin: top right;
}

.lang-dropdown.open .lang-dropdown-menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 14px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  text-align: left;
}

.lang-option:hover {
  background: var(--bg-surface-2);
  color: var(--text-1);
}

.lang-option.active {
  color: var(--accent);
  background: var(--accent-dim);
}

.lang-option .lang-flag { font-size: 1.15rem; }
.lang-option .lang-name { flex: 1; }

.lang-check {
  width: 13px;
  height: 13px;
  color: var(--accent);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity var(--transition);
}

.lang-option.active .lang-check { opacity: 1; }

/* === HAMBURGUER === */
.nav-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  cursor: pointer;
  background: transparent;
  border: none;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.nav-hamburger:hover { background: var(--bg-surface); }

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-1);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), width 0.3s var(--ease);
  transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; width: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === MENU MOBILE === */
.nav-mobile-menu {
  position: fixed;
  top: calc(var(--navbar-height) + var(--topbar-h));
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
  z-index: 999;
}

.nav-mobile-menu.open {
  max-height: 520px;
}

.nav-mobile-inner {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-mobile-link {
  display: block;
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--text-2);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-decoration: none;
  border-left: 2px solid transparent;
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
  color: var(--text-1);
  background: var(--bg-surface);
  border-left-color: var(--accent);
}

.nav-mobile-divider {
  height: 1px;
  background: var(--border);
  margin: 8px 0;
}

.nav-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 8px 0 4px;
}

.nav-mobile-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0 8px;
}

/* Dropdown de idioma no menu mobile — abre para baixo dentro do menu */
.lang-dropdown--mobile .lang-dropdown-menu {
  position: static;
  transform: none;
  box-shadow: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 6px;
  display: none;
}

.lang-dropdown--mobile.open .lang-dropdown-menu {
  display: block;
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.lang-dropdown--mobile .lang-dropdown-trigger {
  width: 100%;
  justify-content: space-between;
}

/* === DESKTOP === */
@media (min-width: 768px) {
  .nav-links    { display: flex; }
  .nav-actions  { display: flex; }
  .nav-hamburger { display: none; }
  .nav-mobile-menu { display: none; }
}